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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    雜志簡介

    主辦單位: 蘇州混凝土水泥制品研究院
    中國混凝土與水泥制品協會
    • 主編 : 李建華
    • 常務副主編 : 王春蓉
    • 刊期 : 月刊
    • 電話 : 0512-68285716
    • E-mail : sccpitg@126.com
    • 國內統一刊號(CN) : 32-1173/TU
    • 國際標準刊號(ISSN) : 1000-4637
    • 郵發代號 : 28-80
    hunnitu 微信公眾號
    hunnitu 掃碼訂購雜志

    混凝土研究

    海洋侵蝕環境下超高性能混凝土的力學與耐久性能研究
    海洋侵蝕環境下超高性能混凝土的力學與耐久性能研究
    • 張志豪1,2,陳露一1,2,黃有強1,2,蓋珂瑜1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:通過加速劣化試驗方法研究了超高性能混凝土(UHPC)在模擬海洋侵蝕環境下的力學和耐久性能。結果表明:海水養護下UHPC的力學性能受開始浸泡時間的影響較小,長期力學性能發展比較穩定;UHPC具有良好的適應性和耐久性能,凍融循環對UHPC性能的影響相對較大,但介質類型對其性能的影響較??;隨著硫酸鹽干濕循環次數的增加,UHPC的相對動彈性模量和抗壓強度耐蝕系數先增加后降低,質量損失增加;硫酸鹽干濕循環會導致UHPC表面露出的鋼纖維銹蝕,但內部結構無損傷,鋼纖維與基體結合緊密。 Abstract: The mechanical properties and durability of ultra-high performance concrete(UHPC) under marine environment were investigated by accelerated deterioration test. The results show that the mechanical properties of UHPC under seawater curing are less affected by the initial immersion time, and the long-term mechanical properties are relatively stable. UHPC has good adaptability and durability. Freeze-thaw cycles have a relatively large effect on UHPC performance, but media type has less effect on UHPC performance. With the increase of the number of dry and wet cycles of sulfate, the relative dynamic elastic modulus and compressive strength corrosion resistance coefficient of UHPC first increase and then decrease, and the mass loss increases. The dry and wet cycles of sulfate lead to steel fiber corrosion on the surface, but the internal structure is not damaged, and the steel fiber is closely combined with the matrix.
    張志豪,陳露一,黃有強,等.海洋侵蝕環境下超高性能混凝土的力學與耐久性能研究[J].混凝土與水泥制品,2022(7):1-4,9. ZHANG Z H,CHEN L Y,HUANG Y Q,et al.Study on Mechanical Proporties and Durability of Ultra-high Performance Concrete Under Marine Erosion Environment[J].China Concrete and Cement Products,2022(7):1-4,9.
    石墨改性EPS顆粒對超輕泡沫混凝土性能的影響
    石墨改性EPS顆粒對超輕泡沫混凝土性能的影響
    • 康升榮,程寶軍,麻鵬飛,史博元
    2022年第7期
    摘要
    引用本文
    摘 ? 要:采用普通硅酸鹽水泥、氣凝膠粉、石墨改性EPS顆粒、發泡劑等制備了干密度約為120 kg/m3的石墨改性EPS顆粒超輕泡沫混凝土,研究了石墨改性EPS顆粒對其密度、力學性能、吸水率、導熱系數和孔結構的影響。結果表明:當石墨改性EPS顆粒摻量為30%時,超輕泡沫混凝土的各項性能最優,抗壓強度為0.25 MPa,吸水率為10.3%,導熱系數為0.032 6 W/(m·K);隨著石墨改性EPS顆粒摻量的增加,損泡率明顯增大,孔徑分布和孔結構參數發生明顯改變。 Abstract: The foam concrete with a dry density of 120 kg/m3 was prepared by ordinary portland cement, aerogel powder, graphite modified EPS particles, foaming agent and additive. The effects of graphite modified EPS particles content on the density, mechanical properties, water absorption, thermal conductivity, and pore structure of foam concrete were studied. The results show that when graphite modified EPS particles with the content of 30% are added, the foam concrete has the best properties, the compressive strength is 0.25 MPa, the water absorption is 10.3%, and the thermal conductivity is 0.032 6 W/(m·K). With the increase of the content of graphite modified EPS particles, the bubble loss rates increase obviously, and the pore size distribution and pore structure parameters change obviously.
    康升榮,程寶軍,麻鵬飛,等.石墨改性EPS顆粒對超輕泡沫混凝土性能的影響[J].混凝土與水泥制品,2022(7):5-9. KANG S R,CHENG B J,MA P F,et al.Influence of Graphite Modified EPS Particles on the Performance of Ultra-light Foam Concrete[J].China Concrete and Cement Products,2022(7):5-9.
    超緩釋降黏型外加劑在泵送頂升自密實混凝土中的應用
    超緩釋降黏型外加劑在泵送頂升自密實混凝土中的應用
    • 李繼存1,趙少鵬2,3,陸加越2,3,楊曉奇2,3
    2022年第7期
    摘要
    引用本文
    李繼存,趙少鵬,陸加越,等.超緩釋降黏型外加劑在泵送頂升自密實混凝土中的應用[J].混凝土與水泥制品,2022(7):10-13,19. LI J C,ZHAO S P, LU J Y,et al.Application of Super Slow-release Viscosity-reducing Admixture in Pumping-up Self-compacting Concrete[J].China Concrete and Cement Products,2022(7):10-13,19.
    膠砂比對UHPC高溫力學性能及微觀結構的影響
    膠砂比對UHPC高溫力學性能及微觀結構的影響
    • 王 宏1,2,王丹丹3,朱 平1,2,何長龍1,2,王桂敏1,2,蓋梅香1,2,孫曉光1,2
    2022年第7期
    摘要
    引用本文
    摘 ? 要:利用鐵尾礦砂制備了超高性能混凝土(UHPC),研究了在高溫環境下不同膠砂比(1∶0.8、1∶0.9、1:1.0、1∶1.1)對UHPC試件力學性能的影響,測定了高溫下UHPC的孔結構,并用SEM表征了UHPC的微觀結構,探討了膠砂比對UHPC高溫性能影響的機理。結果表明,隨著溫度的不斷升高,不同膠砂比的UHPC力學性能出現了不同程度的下降,其中,膠砂比為1∶1.0的UHPC在各個目標溫度下均表現出相對較高的力學性能;微觀分析表明膠砂比為1∶1.0的UHPC基體比膠砂比為1∶0.8的UHPC基體更加密實,在高溫作用下裂縫寬度更小,且基體與鋼纖維的結合能力更強,有效降低了鋼纖維在高溫下的破壞程度。 Abstract: Ultra-high performance concrete(UHPC) was prepared by iron tailings sand. The effect of different binder-sand ratio(1∶0.8, 1∶0.9, 1∶1.0, 1∶1.1) on the mechanical properties of UHPC at high temperature was studied. The pore structure of UHPC at high temperature was determined. The microstructure of UHPC was charactered by SEM, and the mechanism of the effect of binder-sand ratio on the high temperature properties of UHPC was discussed. The results show that with the increase of temperature, the mechanical properties of UHPC with different binder-sand ratio decrease in varying degrees, and the UHPC with 1∶1.0 binder-sand ratio shows relatively high mechanical properties at each target temperature. Pore structure and SEM analysis show that UHPC matrix with 1∶1.0 binder-sand ratio is denser than UHPC matrix with 1∶0.8 binder-sand ratio, and crack width is smaller under high temperature. In addition, UHPC matrix with 1∶1.0 binder-sand ratio has stronger bonding ability with steel fiber, which effectively reduces the damage degree of steel fiber at high temperature.
    王宏,王丹丹,朱平,等.膠砂比對UHPC高溫力學性能及微觀結構的影響[J].混凝土與水泥制品,2022(7):14-19. WANG H,WANG D D,ZHU P,et al.Effect of Binder-sand Ratio on High-temperature Mechanical Properties and Microstructure of UHPC[J].China Concrete and Cement Products,2022(7):14-19.
    納米材料修復混凝土道面微裂縫的研究
    納米材料修復混凝土道面微裂縫的研究
    • 王后裕1,方新宇1,劉海濤2,曹海琳2,任韋波1,呂曉聰3,江志華4,馬 騰4
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為了修復機場混凝土道面微裂縫,采用液相溶膠-凝膠法合成了一種硅聚集體納米修復材料,并研究了該納米修復材料對道面混凝土抗壓、抗折、防水、抗滲、抗氯離子滲透、抗凍、耐磨等性能的改善效果,探討了其修復機理。結果表明:經納米材料修復后,含微裂縫混凝土的抗壓強度提高了1.1倍,抗折強度提高了90%,抗滲性能提高了1.6倍,抗氯離子滲透性能提高了60%,抗凍性能提高了70%,耐磨性能提高了65%,防水性能有顯著改善,摩擦系數變化不大。 Abstract: To repair the micro-cracks in the concrete pavement of the airport, a silicon aggregate nano-repair material was synthesized by liquid sol-gel method. The improvement effects of nano-repair material on the properties of pavement concrete such as compressive strength, flexural strength, waterproofing, impermeability, chloride ion penetration resistance, freeze-thaw resistance and wear resistance were studied, and its repair mechanism was discussed. The results show that the compressive strength, flexural strength, impermeability, chloride ion penetration, freeze-thaw resistance and wear resistance ?of concrete with micro-cracks are increased by 1.1 times, 90%, 1.6 times, 60%, 70% and 65%, respectively. The waterproof performance is significantly improved, and the surface friction coefficient has not changed much.
    王后裕,方新宇,劉海濤,等.納米材料修復混凝土道面微裂縫的研究[J].混凝土與水泥制品,2022(7):20-24. WANG H Y,FANG X Y,LIU H T,et al.Study on Micro-cracks Repairing of Concrete Pavement with Nano-repair Materials[J].China Concrete and Cement Products,2022(7):20-24.
    混凝土彈塑性單軸受壓分形損傷本構關系研究
    混凝土彈塑性單軸受壓分形損傷本構關系研究
    • 謝 明1,汪 鵬1,鄭山鎖2,劉佳豪1,王 梓1,周靜靜1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:考慮混凝土單軸受壓破壞機理,在混凝土靜力損傷基礎上引入彈簧-摩擦塊模型,以模擬混凝土彈塑性階段的細觀結構變化?;诩氂^模型中彈簧、摩擦塊對混凝土斷裂面的影響,分析了混凝土受壓損傷的破壞規律,建立了不同強度等級混凝土彈塑性單軸受壓損傷本構模型,采用混凝土分形曲面模擬方法對所建模型進行了驗證。結果表明:所建立的模型能夠較好描述混凝土的塑性變形,對混凝土彈塑性的離散范圍具有良好的預測能力。 Abstract: Considering the failure mechanism of concrete under uniaxial compression, on the basis of concrete static damage, a spring-friction block model was introduced to simulate the meso-structural changes of concrete in the elastic-plastic stage. Based on the influence of the spring and friction block on the fracture surface of concrete in the mesoscopic model, the failure law of concrete compressive damage was analyzed, and the elastic-plastic uniaxial compressive damage constitutive model of concrete with different strength grades was established. The model was verified by the concrete fractal surface simulation method. The results show that the established model can describe the impact of concrete plastic deformation well, and has a good ability to predict the elastoplastic dispersion range of concrete.
    謝明,汪鵬,鄭山鎖,等.混凝土彈塑性單軸受壓分形損傷本構關系研究[J].混凝土與水泥制品,2022(7):25-29,39. XIE M,WANG P,ZHENG S S,et al.Fractal Damage Constitutive Relation of Concrete Elastoplastic Uniaxial Compression[J].China Concrete and Cement Products,2022(7):25-29,39.
    HCSA抗裂增強混凝土的應用研究
    HCSA抗裂增強混凝土的應用研究
    • 劉 立1,趙宇洋2,徐 寧1,季彩云1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:研究了HCSA抗裂增強材料對混凝土強度、限制膨脹率、溫度應力的影響,并分析了蒸養與非蒸養條件下摻抗裂增強材料混凝土的強度發展變化情況。結果表明:抗裂增強材料可顯著提高混凝土的抗裂性,當水膠比為0.36、抗裂增強材料摻量為70 kg/m3時,混凝土強度發展良好,且限制膨脹率較高;抗裂增強材料可顯著降低混凝土的溫度敏感性,當抗裂增強材料摻量為50 kg/m3時,混凝土試件最大壓應力提高了119%,斷裂應力下降了13%,斷裂溫度降低了37%;采用抗裂增強材料代替粉煤灰,在免蒸養條件下,混凝土1 d強度比提高了192%,在蒸養條件下,1 d強度比提高了196%。 Abstract: The effects of HCSA anti-cracking reinforcement materials on the strength, limiting expansion rate and temperature stress of concrete were investigated. The strength development of concrete under steam curing and non-steam curing after adding anti-cracking reinforcement materials were analyzed. The results show that the ?HCSA anti-cracking reinforcement material can significantly improve the crack resistance of concrete. When the W/B is 0.36 and the content of the anti-cracking reinforcement material is 70 kg/m3, the concrete strength developed well, and the limiting expansion rate is high. The anti-cracking reinforcement material can significantly reduce the temperature sensitivity of concrete. When the anti-cracking reinforcement material is added at 50 kg/m3, the maximum compressive stress of concrete specimens is increased by 119%, the fracture stress is reduced by 13% and the fracture temperature is reduced by 37%. When fly ash is instead by anti-cracking reinforcement material, the 1 d strength ratio of concrete increases by 192% under the non-steam curing conditions, the 1 d intensity ratio increases by 196% under the steam curing conditions.
    劉立,趙宇洋,徐寧,等.HCSA抗裂增強混凝土的應用研究[J].混凝土與水泥制品,2022(7):30-34,39. LIU L, ZHAO Y Y,XU N,et al.Application Study of HCSA Anti-cracking Reinforcement Materials in Concrete[J].China Concrete and Cement Products,2022(7):30-34,39.
    硫酸鹽漬土地區粉煤灰混凝土抗壓強度研究
    硫酸鹽漬土地區粉煤灰混凝土抗壓強度研究
    • 郭佳慶1,2,馬艷霞1,2,聶思凡1,2,魯生斌1,2,白繼雄3
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為了探究硫酸鹽漬土地區粉煤灰混凝土抗壓強度隨侵蝕時間的變化規律,在某典型硫酸鹽漬土地區埋置不同粉煤灰摻量(0、10%、15%、20%)的混凝土試件進行了硫酸鹽侵蝕后的抗壓強度試驗和微觀形貌分析,并基于BP神經網絡模型預測了試件的抗壓強度。試驗結果表明:不同粉煤灰摻量試件的抗壓強度均隨著侵蝕時間的增加先升高后降低;當粉煤灰摻量為10%時,試件的抗壓強度最高。SEM分析表明:540 d時大部分試件出現了微裂縫,840 d時試件均發生了劣化,但尚未破壞;當粉煤灰摻量為10%時,試件的劣化不明顯;預測結果表明,侵蝕時間是影響摻粉煤灰混凝土試件抗壓強度的最主要因素。 Abstract: In order to explore the change rules of the compressive strength of fly ash concrete with erosion time in the sulfate-saline soil area, concrete specimens with different fly ash content(0, 10%, 15%, 20%) were embedded in a typical sulfate-saline soil area, and the compressive strength test and microscopic morphology analysis after sulfate erosion were carried out. The compressive strength of the specimen was predicted based on the BP neural network model. The test results show that the compressive strength of fly ash concrete with different fly ash content increases first and then decreases with the increase of erosion time. At different erosion time nodes, when the fly ash content is 10%, the compressive strength of the specimen is the highest. The SEM results show that at 540 d, most of the specimens appear micro-cracks. At 840 d, all the specimens are deteriorated, but not damaged. When the fly ash content is 10%, the deterioration of the specimens is not obvious. The prediction results show that erosion time is the main factor affecting the service performance of fly ash concrete.
    郭佳慶,馬艷霞,聶思凡,等.硫酸鹽漬土地區粉煤灰混凝土抗壓強度研究[J].混凝土與水泥制品,2022(7):35-39. GUO Jia-qing1,2, MA Yan-xia1,2, NIE Si-fan,et al.Research on the Compressive Strength of Fly Ash Concrete in the Sulfate-saline Soil Area[J].China Concrete and Cement Products,2022(7):35-39.
    透水混凝土的細觀孔隙結構分析
    透水混凝土的細觀孔隙結構分析
    • 劉冠志1,侯澤彪1,廖 霖1,呂永斌2,李子東2,王永明2
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為了探究不同骨料粒徑及不同膠凝材料用量對透水混凝土內部孔隙結構的影響,采用CT掃描技術對不同骨料粒徑以及不同膠凝材料用量的試件進行了試驗,并使用重構軟件對掃描結果進行了二維及三維分析。結果表明:主要影響透水混凝土孔隙結構的因素是骨料粒徑和膠凝材料用量;孔隙結構可以看作由孔室和孔喉兩部分組成,骨料粒徑對孔室的影響較大,孔室的大小隨著骨料粒徑的增大逐漸向大孔室發展;孔喉面積主要受膠凝材料用量的影響;孔喉面積對透水混凝土的透水率有一定的影響。 Abstract: In order to explore the effects of different particle sizes of aggregates and different amounts of cementitious materials on the internal pore structure of permeable concrete, CT scanning technology was used to test specimens with different aggregate particle sizes and different amounts of cementitious materials, and reconstruction software was used. The scan results were analyzed in 2D and 3D. The results show that the factors affecting the pore structure of permeable concrete are the aggregate particle size and the amount of cementitious material. The pore structure can be regarded as consisting of two parts, the pore chamber and the pore throat, and the aggregate particle size has a great influence on the pore chamber. With the increase of aggregate particle size, the size of the pore chamber gradually develops into a large pore, and the pore throat area is mainly affected by the amount of cementitious material. Pore throat area has a certain influence on the permeability of pervious concrete.
    劉冠志,侯澤彪,廖霖,等.透水混凝土的細觀孔隙結構分析[J].混凝土與水泥制品,2022(7):40-44. LIU G Z,HOU Z B,LIAO L,et al.Analysis of Microscopic Pore Structure of Pervious Concrete[J].China Concrete and Cement Products,2022(7):40-44.

    水泥混凝土制品

    雙區域斷絲PCCP極限內水壓力及破壞模式研究
    雙區域斷絲PCCP極限內水壓力及破壞模式研究
    • 張 寬1,馮 新1,李海珍1,劉賢良2
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為研究腐蝕斷裂對預應力鋼筒混凝土管(PCCP)失效的影響,建立了PCCP雙區域斷絲三維非線性管-土相互作用有限元模型,得到了不同間距軸向雙區域斷絲情況下管道的損傷演化、失效模式和極限承載能力。結果表明,斷絲區域間距越大,相互影響越小,當間距大于150 cm后,兩個區域之間基本沒有相互作用,其極限內水壓力與單區域斷絲的結果差別顯著。研究結果可為PCCP實際工程中的雙區域斷絲損傷評價及承載能力分析提供參考。 Abstract: In order to study the effect of corrosion fracture on the failure of prestressed concrete cylinder pipe (PCCP), the 3D nonlinear finite element model of PCCP with double-zone broken wires was established to investigate the structural responses and the ultimate internal pressure by considering the pipe-soil interaction. The results show that the greater the distance between the two regions, the smaller the mutual influence. When the interval is greater than 150 cm, it can be considered that there is no interaction between the two regions, and the ultimate internal pressure is much larger than that of the single-zone broken wires with the same axial length. The research results can provide the theoretical basis for multi-region broken wire damage evaluation and bearing capacity analysis in real applications.
    張寬,馮新,李海珍,等.雙區域斷絲PCCP極限內水壓力及破壞模式研究[J].混凝土與水泥制品,2022(7):45-49,68. ZHANG K,FENG X,LI H Z,et al.Study on Failure Modes and Ultimate Internal Pressure for PCCP with Double-zone Broken Wires[J].China Concrete and Cement Products,2022(7):45-49,68.
    鋼筋混凝土構件疲勞設計研究
    鋼筋混凝土構件疲勞設計研究
    • 許家婧,葉浩天,殷浩天,曹 慧,張邵峰
    2022年第7期
    摘要
    引用本文
    摘 ? 要:對比分析了國內外混凝土結構設計規范中關于疲勞設計的規定后發現:美國混凝土協會ACI 215R—74《疲勞荷載下混凝土結構設計規定》、日本土木工程學會JSCE 2007《混凝土結構設計規范》、我國GB 50010—2010《混凝土結構設計規范(2015年版)》均采用容許應力法進行鋼筋混凝土構件疲勞設計;美國公路運輸協會AASHTO LRFDUS—2017《高速公路橋梁設計規范》和歐洲CEB-FIP(2010)《混凝土結構規范》則采用疲勞極限狀態設計方法,考慮荷載和抗力系數,以結構使用壽命不超過失效壽命為原則進行鋼筋混凝土構件疲勞設計。在總結各國規范基礎上,提出了鋼筋混凝土構件的疲勞設計基本步驟,并進行了算例分析。 Abstract: Fatigue design codes of concrete structures from different countries were summarized and compared. It is found that the fatigue design methods are different. The American Concrete Institute standard ACI 215R—74 Considerations for Design of Concrete Structures Subjected to Fatigue Loading, Japan Society of Civil Engineers standard JSCE 2007Standard Specification for Concrete Structures and Chinese standard GB 50010—2010 Code for Design of Concrete Structures are based on allowable stress method. American Association of State Highway and Transportation Officials standard AASHTO LRFDUS—2017 Bridge Design Specifications and European Concrete Commission and International Prestressed Concrete Association standard CEB-FIP(2010) Model Code for Concrete Structures are based on fatigue limit state method, and the load and resistance coefficient are considered, and the fatigue design of reinforced concrete components is carried out on the principle that the service life of the structure does not exceed the failure life. In addition, the fatigue design procedures and the calculation example are provided.
    許家婧,葉浩天,殷浩天,等.鋼筋混凝土構件疲勞設計研究[J].混凝土與水泥制品,2022(7):50-54. XU J J,YE H T,YIN H T,et al.Study on Fatigue Design Methods of Reinforced Concrete Components[J].China Concrete and Cement Products,2022(7):50-54.
    再生混凝土免燒磚制備工藝研究
    再生混凝土免燒磚制備工藝研究
    • 孫洪浩1,劉紅梅1,2,郭 容1,張 健3,朱晨輝1
    2022年第7期
    摘要
    引用本文
    摘 ?要:利用廢棄混凝土再生細骨料及再生微粉,采用靜壓成型工藝制備了再生混凝土免燒磚,以抗壓強度和抗折強度為優化指標,分別對制磚成型工藝與養護工藝進行了研究。結果表明:再生混凝土免燒磚的強度隨著成型壓力和蒸汽養護時間的增加而增加;再生混凝土免燒磚的強度隨著壓制速度的增加而呈現下降趨勢;最佳成型壓力為15 MPa、壓制速度為0.6 mm/s、蒸汽養護溫度為80 ℃、養護時間為16 h。在此生產條件下,再生混凝土免燒磚的28 d抗壓強度為12.1 MPa。 Abstract: The recycled fine aggregate and recycled micro powder of waste concrete were used to prepare recycled baking-free brick by static pressure forming. Taking the compressive strength and flexural strength of recycled baking-free bricks as the optimization index, the forming process and curing process of recycled concrete baking-free bricks were studied respectively. The results show that the strength of recycled concrete baking-free bricks increases with the increase of molding pressure. The strength of recycled concrete baking-free bricks decreases continuously with the increase of pressing speed. The optimum molding pressure is 15 MPa, pressing speed is 0.6 mm/s and the steam curing system is 80 ℃ for 16 h. Under this condition, the 28 d compressive strength of recycled concrete baking-free bricks reaches 12.1 MPa.?
    孫洪浩,劉紅梅,郭容,等.再生混凝土免燒磚制備工藝研究[J].混凝土與水泥制品,2022(7):55-59. SUN H H,LIU H M,GUO R,et al.Study on Preparation Technology of Recycled Concrete Baking-free Bricks[J].China Concrete and Cement Products,2022(7):55-59.

    纖維水泥及制品

    堿化稻草纖維對尾砂充填體力學性能的影響
    堿化稻草纖維對尾砂充填體力學性能的影響
    • 張 競,李 駿
    2022年第7期
    摘要
    引用本文
    摘 ? 要:將經過濃度為4%的NaOH溶液堿化處理過的稻草纖維作為加筋材料用于尾砂充填體試件的制備,研究了灰砂比、堿化稻草纖維的長度和摻量對尾砂充填體試件抗壓強度的影響,并借助掃描電鏡(SEM)從微觀角度分析了堿化稻草纖維的作用機理。結果表明:隨著堿化稻草纖維摻量的增加,試件的抗壓強度下降;隨著堿化稻草纖維長度的增加,試件的抗壓強度先增大后減??;未堿化稻草纖維對試件抗壓強度的降低程度顯著大于堿化稻草纖維;隨著灰砂比的減小,試件的抗壓強度降低。 Abstract: The straw fiber alkalized by 4% NaOH solution was used as reinforcement material for the preparation of tailings backfill specimens. The effects of cement-sand ratio, length and content of alkalized straw fiber on the compressive strength of tailings backfill specimens were studied, and the action mechanism of alkalized straw fiber was analyzed by SEM. The results show that the compressive strength of the specimen decreases with the increase of the alkalized straw fiber content. With the increase of the length of alkalized straw fiber, the compressive strength of the specimen first increases and then decreases. The reduction degree of the compressive strength of the specimen by the non-alkalized straw fiber is significantly greater than that of the alkalized straw fiber. With the decrease of cement sand ratio, the compressive strength of the specimen decreases.
    張競,李駿.堿化稻草纖維對尾砂充填體力學性能的影響[J].混凝土與水泥制品,2022(7):60-63. ZHANG J,LI J.Effect of Alkalized Straw Fiber on Mechanical Properties of Tailings Backfill[J].China Concrete and Cement Products,2022(7):60-63.
    玄武巖纖維混凝土動態力學性能及數值模擬
    玄武巖纖維混凝土動態力學性能及數值模擬
    • 王 嵩,劉潤清,趙 碩,孫斯慧
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為了研究沖擊荷載作用下玄武巖纖維(BF)對混凝土性能的影響,采用分離式霍普金森壓桿(SHPB),在0.6 MPa沖擊氣壓作用下對不同BF體積摻量(0、0.05%、0.10%、0.15%、0.20%、0.25%、0.30%、0.35%)玄武巖纖維混凝土(BFRC)進行了沖擊壓縮試驗,并基于試驗數據,選用修正后的HJC本構模型對動態沖擊過程進行了模擬。結果表明:BFRC相較于素混凝土具有更好的抗沖擊性能,且0.30%體積摻量的BF對混凝土的增韌效果最好;修正后的HJC模型可以較好地反映出BFRC的應力、應變狀態,體現BFRC破壞過程中裂紋的發展規律,模擬結果與試驗結果吻合較好。 Abstract: In order to study the effect of basalt fiber (BF) on the performance of concrete under impact load, the impact compression test of basalt fiber reinforced concrete(BFRC) with different volume content of BF (0, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, 0.30%, 0.35%) was carried out by using split hopkinson pressure bar(SHPB) under the impact pressure of 0.6 MPa. Based on the test datas, the modified HJC constitutive model was selected to simulate the dynamic impact process. The results show that the BFRC has better impact load resistance than plain concrete, and BF with 0.30% volume content has the best toughening effect on concrete. The modified HJC model can better reflect the stress and strain state of BFRC and reflect the crack development law in the failure process of BFRC. The simulation results are in good agreement with the experimental results.
    王嵩,劉潤清,趙碩,等.玄武巖纖維混凝土動態力學性能及數值模擬[J].混凝土與水泥制品,2022(7):64-68. WANG Song, LIU Run-qing, ZHAO Shuo,et al.Dynamic Mechanical Properties and Numerical Simulation of Basalt Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(7):64-68.

    房建材料及制品

    GFRP增強海水海砂混凝土柱軸壓性能研究
    GFRP增強海水海砂混凝土柱軸壓性能研究
    • 李佳敏a,楊樹桐b,劉 暢b
    2022年第7期
    摘要
    引用本文
    摘 ? 要:研究了GFRP縱筋與GFRP箍筋共同作用、GFRP管與GFRP筋共同作用對海水海砂混凝土(SSC)柱軸壓性能的影響。結果表明:隨著GFRP縱筋配筋率的增加,SSC柱的極限承載力相比對照組提高了4.3%~49.8%;采用GFRP管與GFRP筋共同增強后,SSC柱的承載力和延性進一步提高,試件破壞后整體形狀完整,破壞形式得到了改善。 Abstract: The effects of the interaction of GFRP longitudinal bar and GFRP stirrup and the interaction of GFRP pipe and GFRP bar on the axial compressive behavior of seawater sea sand concrete(SSC) columns were studied. The results show that with the increase of GFRP longitudinal bar ratio, the ultimate bearing capacity of SSC column increases by 4.3%~49.8% compared with the control group. The bearing capacity and ductility of SSC column are further improved after GFRP pipe and GFRP bar are used, and the overall shape of the specimen after failure is complete and the failure form is improved.
    李佳敏,楊樹桐,劉暢.GFRP增強海水海砂混凝土柱軸壓性能研究[J].混凝土與水泥制品,2022(7):69-73,79. LI J M,YANG S T,LIU C.Study on Axial Compressive Behavior of Seawater Sea Sand Concrete Columns Reinforced with GFRP[J].China Concrete and Cement Products,2022(7):69-73,79.
    裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究
    裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究
    • 王洪鎮1,王海瑞1,蘇明明2,馬得俊2,馬 壽2,馬亮亮3
    2022年第7期
    摘要
    引用本文
    摘 ? 要:為研究實際工程中裝配式鋼骨增強微孔混凝土復合樓板的承載能力,通過靜載試驗,得到了其荷載-撓度曲線和裂縫長期發展特征,并對該復合樓板進行了配筋計算、裂縫寬度和撓度驗算。此外,采用有限元軟件MARC對復合樓板進行了受力分析,并與試驗結果進行了對比,發現兩者吻合程度較高。研究結果可為相關復合樓板的設計提供參考。 Abstract: In order to study the bearing capacity of prefabricated steel reinforced microporous concrete composite floor slabs in practical engineering, the loading-deflection relationship and the long-term crack development characteristics of the composite floor slabs were obtained by static loading test. The reinforcement calculation, crack width and deflection checking ?calculation were carried out. The finite element software MARC was used to analyze the stress state of the composite structure slabs, and the results were compared with the test results. The results show that the stress states of theoretical calculation and simulation analysis are quite consistent, which provides a reference for the design of composite structure slabs.
    王洪鎮,王海瑞,蘇明明,等.裝配式鋼骨增強微孔混凝土復合樓板力學性能試驗研究[J].混凝土與水泥制品,2022(7):74-79. WANG H Z,WANG H R,SU M M,et al.Experimental Study on Mechanical Properties of Prefabricated Steel Reinforced Microporous Concrete Composite Floor Slabs[J].China Concrete and Cement Products,2022(7):74-79.
    添加纖維材料的混凝土預制復合墻體應用分析
    添加纖維材料的混凝土預制復合墻體應用分析
    • 張亞東1,段宜棟2,梁美清3
    2022年第7期
    摘要
    引用本文
    摘 ? 要:采用MATLAB軟件中的識別圖像控制技術,對典型混凝土圖像數據進行處理,還原了混凝土中骨料的真實排布情況,同時,探究了基于裝配式預制部品部件的保溫一體化復合墻體的新型構造形式。結果表明:在混凝土中添加纖維材料可有效控制復合墻體的開裂問題;采用外葉板+保溫板+內葉墻的“夾心保溫三明治板”構造形式可有效解決裝配式建筑底部加強區所用墻體超寬、超高及外窗開洞存在的問題。 Abstract: Using the recognition image control technology in MATLAB software, the typical concrete image data were processed to restore the real arrangement of aggregate in concrete. At the same time, the new structural form of thermal insulation integratedcomposite wall based on prefabricated components was explored. The results show that adding fiber materials to concrete can effectively control the cracking of composite wall. The structural form of "sandwich thermal insulation sandwich plate" with outer leaf plate and thermal insulation plate and inner leaf wall can effectively solve the existing thorny problems of super width, super height and additional window holes of the wall used in the bottom reinforcement area of prefabricated buildings.
    張亞東,段宜棟,梁美清.添加纖維材料的混凝土預制復合墻體應用分析[J].混凝土與水泥制品,2022(7):80-82. ZHANG Y D,DUAN Y D,LIANG M Q.Structural Analysis of Precast Concrete Composite Wall with Fiber Materials[J].China Concrete and Cement Products,2022(7):80-82.

    標準解讀

    GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》主要條文解析
    GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》主要條文解析
    • 王春蓉1,鈕如嵩1,胡佳星2,奚飛達1,田 寅1,史星祥1,潘從玲1,鄧稚川1,夏如茜1
    2022年第6期
    摘要
    引用本文
    新制定的國家標準GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》已于 2022年3月1日實施。為便于該標準的使用方準確理解標準條款的具體含義,正確貫徹實施標準條款的具體要求和規定,介紹了該標準的編制背景和意義,并對標準的主要條款及其制定理由進行了解釋和說明。 The newly formulated national standard of GB/T 40399—2021 General Technical Conditions for Precast Concrete Part of Prefabricated Construction has been officially implemented in March 1st, 2022. In order to facilitate understanding the specific meaning of the standard terms and correctly implement the specific requirements and provisions of the standard terms by the users, the purpose and significance of the standard are introduced, and the main provisions of the standard and the revision reasons are expained.
    王春蓉,鈕如嵩,胡佳星,等.GB/T 40399—2021《裝配式混凝土建筑用預制部品通用技術條件》主要條文解析[J].混凝土與水泥制品,2022(6):71-76. WANG C R,NIU R S,HU J X,et al.Analysis of Main Clauses in GB/T 40399—2021 General Technical Conditions for Precast Concrete Part of Prefabricated Construction[J].China Concrete and Cement Products,2022(6):71-76.

    施工技術研究

    混凝土箱梁分層澆筑水化熱實測與模擬分析
    混凝土箱梁分層澆筑水化熱實測與模擬分析
    • 鄒惠瓊,白洪濤,李 梅
    2022年第6期
    摘要
    引用本文
    為探究混凝土箱梁在分層澆筑施工過程中水化熱溫度的發展規律及其溫度應力,對某主跨230 m的大跨度預應力混凝土箱梁橋零號塊水化熱進行了連續觀測,并基于觀測結果和有限元數值模擬計算,分析了零號塊水化過程中底板、腹板和橫隔板的溫度應力發展規律;同時,討論了分層澆筑和整體澆筑兩種不同施工方案對零號塊水化熱溫度應力分布的影響,研究了拆模時間對結構內外溫度的影響程度。結果表明:內外溫差在結構內部產生的溫度應力超過了材料的抗拉強度,從而導致了溫度裂縫的產生;采用分層澆筑施工的零號塊將在上下層混凝土交界面附近形成一條拉應力帶;過早拆模會使混凝土內外溫差迅速擴大,而養護4 d后拆?;炷羶韧鉁夭钕鄬^小,建議零號塊拆模前養護時間不宜少于4 d。 In order to explore the development law of concrete hydration heat temperature of box girder by distinct-layer casting and accurately calculate the temperature stress, the concrete hydration heat in the No.0 block of box girder of a long span (230 m) PC continuous bridge was observed continuously. Based on the field test results and the numerical simulation calculation by FEA, the temperature stress development law of the bottom plate, web and diaphragm were analyzed. Meanwhile, the influence of the construction scheme on the hydration heat temperature stress of the No.0 block of box girder was discussed and the influence of the form removal time on temperature difference was researched. The results show that the excessive temperature difference can cause the excessive temperature stress and the temperature cracks. Besides, the tensile stress field can be formed near the interface between the top and the bottom concrete in the No.0 block of box girder by distinct-layer casting. The research results also show that the form removal time should not be less than 4 days to prevent temperature cracks.
    鄒惠瓊,白洪濤,李梅.混凝土箱梁分層澆筑水化熱實測與模擬分析[J].混凝土與水泥制品,2022(6):77-81. ZOU H Q,BAI H T,LI M.Measurement and Simulation Analysis of Hydration Heat of Layered Pouring Concrete Box Girder[J].China Concrete and Cement Products,2022(6):77-81.

    節能降碳

    核電工程用大摻量礦物摻合料高性能混凝土試驗研究
    核電工程用大摻量礦物摻合料高性能混凝土試驗研究
    • 劉向坤,胡德華,張 偉,涂 濤
    2022年第7期
    摘要
    引用本文
    摘 ? 要:在礦物摻合料總摻量35%~60%和水膠比0.42~0.29的情況下,采用粉煤灰、礦粉復摻,設計了系列大摻量礦物摻合料高性能混凝土(HPC)配合比,試驗研究了礦物摻合料摻量、水膠比對HPC坍落度、抗壓強度、抗碳化性能、抗氯離子滲透性能、早期收縮性能的影響。結果表明:礦物摻合料可顯著改善HPC的性能,且隨著水膠比的降低,礦物摻合料對HPC性能的改善效果更顯著;所制備的大摻量礦物摻合料HPC具有良好的技術可行性,滿足相關核電工程設計要求。 Abstract: With total percentage of mineral admixture of 35%~60% and water-binder ratio of 0.42~0.29, the high-performance concrete was made blending with fly ash and slag. The effects of mineral admixture content and water-binder ratio on slump, compressive strength, chloride ion penetration resistance, carbonation resistance, and early shrinkage properties of concrete were studied. The results show that the properties of HPC can be significantly improved by blending with mineral admixture, and with reduction of water-binder ratio, the affection is more significantly. The prepared HPC with large percentage of mineral admixture has good technical feasibility and meets the design requirements of nuclear power projects.
    劉向坤,胡德華,張偉,等.核電工程用大摻量礦物摻合料高性能混凝土試驗研究[J].混凝土與水泥制品,2022(7):83-86. LIU X K,HU D H,ZHANG W,et al.Study on High-performance Concrete with Large Percentage of Mineral Admixture in Nuclear Power Projects[J].China Concrete and Cement Products,2022(7):83-86.
    再生微粉泡沫混凝土的配合比設計
    再生微粉泡沫混凝土的配合比設計
    • 謝洪陽1,董建軍1,戴宜文1,鄧 勇1,鄧明偉2
    2022年第7期
    摘要
    引用本文
    摘 ? 要:通過正交試驗研究了氣泡群摻量、再生微粉摻量、水料比和羥丙基甲基纖維素醚(HPMC)摻量對再生微粉泡沫混凝土性能的影響,并結合功效系數法確定了再生微粉泡沫混凝土的最優配合比。采用SEM和XRD探究了再生微粉泡沫混凝土的微觀結構。結果表明:再生微粉泡沫混凝土的抗壓強度隨著氣泡群摻量、再生微粉摻量的增加呈下降趨勢,隨著水料比的增加呈先上升后下降的趨勢,隨著HPMC摻量的增加呈上升趨勢;再生微粉泡沫混凝土的最優配合比為氣泡群摻量4%、再生微粉摻量30%、水料比0.6、HPMC摻量0.07%;再生微粉泡沫混凝土抗壓強度的提升主要歸因于孔隙細化和HPMC減少了連通孔的產生。 Abstract: The effects of bubbles content, recycled micropowder content, water-material ratio and HPMC content on the properties of foamed concrete with recycled micropowder were studied by orthogonal test, and the optimal mix proportion was determined combined with the efficacy coefficient method. The microstructure of foamed concrete with recycled micropowder was investigated by SEM and XRD. The results show that the compressive strength of foamed concrete with recycled micropowder decreases with the increase of the content of bubbles and recycled micropowder, increases first and then decreases with the increase of the water-material ratio, and increases with the increase of the content of HPMC. The optimal mix proportion of foamed concrete with recycled micropowder is 4% of bubbles, 30% of recycled micropowder, 0.6 of water-material ratio and 0.07% of HPMC. The improvement of the compressive strength of foamed concrete with recycled micropowder is mainly attributed to the pore refinement and HPMC reducing the generation of connected pores.
    謝洪陽,董建軍,戴宜文,等.再生微粉泡沫混凝土的配合比設計[J].混凝土與水泥制品,2022(7):87-91. XIE H Y,DONG J J,DAI Y W,et al.Mix Proportion Design of Foamed Concrete with Recycled Micropowder[J].China Concrete and Cement Products,2022(7):87-91.
    再生細骨料的級配優化及對混凝土性能的影響
    再生細骨料的級配優化及對混凝土性能的影響
    • 艾洪祥1,劉 洋1,盧 霄1,李紹純2,鄭???,馬旭東1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:研究了再生細骨料的摻量和顆粒級配對混凝土工作性、力學性能、抗凍性能和耐久性能的影響。結果表明:再生細骨料的最佳摻量為20%,此時,混凝土的工作性和力學性能較好;采用再生細骨料(Ⅱ區粗砂)等質量替代20%天然砂配制的混凝土工作性、力學性能較優,其28 d抗壓強度相比于采用天然砂的基準組提高了9%,且其抗凍性能、耐久性能與采用天然砂配制的混凝土相近。 Abstract: The effects of the content and particle gradation of recycled fine aggregate on the workability, mechanical properties, frost resistance and durability of concrete were studied. The results show that the optimum content of recycled fine aggregate is 20%, and the workability and mechanical properties of concrete are better. The concrete prepared with recycled fine aggregate (coarse sand in zone Ⅱ) instead of 20% natural sand has better workability and mechanical properties, and its 28 d compressive strength is 9% higher than that of the reference group with natural sand, and its frost resistance and durability are similar to those of the concrete prepared with natural sand.
    艾洪祥,劉洋,盧霄,等.再生細骨料的級配優化及對混凝土性能的影響[J].混凝土與水泥制品,2022(7):92-96. AI H X,LIU Y,LU X,et al.Gradation Optimization of Recycled Fine Aggregate and Its Influence on the Properties of Concrete[J].China Concrete and Cement Products,2022(7):92-96.
    廢玻璃粉活性激發及對砂漿性能的影響
    廢玻璃粉活性激發及對砂漿性能的影響
    • 岳 龍,季 濤,周鈺鑫,王 晟,蔣銘昊,符 濤,張士萍
    2022年第7期
    摘要
    引用本文
    摘 ? 要:采用堿激發劑和鹽激發劑激發廢玻璃粉的活性,研究了活性激發前后廢玻璃粉對砂漿ASR膨脹和強度的影響。結果表明:未活性激發時,當廢玻璃粉的取代率為10%時,砂漿的抗折強度和膨脹率均優于基準組;堿激發劑可有效侵蝕廢玻璃粉,產生活性SiO2,但堿過量會引起堿骨料反應的發生,降低砂漿的強度和耐久性;鹽激發劑既能促進廢玻璃粉中活性SiO2的釋放,又能生成鈣礬石,提高基體密實度,但摻量過高會造成鈣礬石過量,導致基體結構疏松,從而降低砂漿的強度和耐久性。 Abstract: The activity of waste glass powder was stimulated by alkali activator and salt activator, and the effect of waste glass powder before and after activation on the ASR expansion and strength of mortar was studied. The results show that when the replacement rate of waste glass powder without active excitation is 10%, the flexural strength and expansion rate of mortar are better than those of the reference group. Alkali activator can effectively erode waste glass powder and generate active SiO2, but excessive alkali will cause alkali-aggregate reaction and reduce the strength and durability of mortar. Salt activator can not only promote the release of active SiO2 in waste glass powder, but also generate ettringite and improve the compactness of the matrix, but excessive salt activator will cause excessive ettringite, resulting in loose matrix structure, thereby reducing the mortar strength and durability.
    岳龍,季濤,周鈺鑫,等.廢玻璃粉活性激發及對砂漿性能的影響[J].混凝土與水泥制品,2022(7):97-100. YUE L,JI T, ZHOU Y X,et al.Active Excitation of Waste Glass Powder and Its Effect on the Properties of Mortar[J].China Concrete and Cement Products,2022(7):97-100.
    堿激發礦渣砂漿的介質傳輸性能研究
    堿激發礦渣砂漿的介質傳輸性能研究
    • 羅具乾1,萬小梅1,2,王 騰3,于 琦1,3,徐培蓁1,曾云輝1,劉 杰1
    2022年第7期
    摘要
    引用本文
    摘 ? 要:通過鹽池浸泡試驗研究了非飽和條件下堿激發礦渣砂漿的介質傳輸機理,分析了不同激發劑和粉煤灰摻量對堿激發礦渣砂漿中水分和氯離子傳輸性能的影響。結果表明:水玻璃激發礦渣砂漿的毛細吸水系數較小,強度較高;非飽和條件下,堿激發礦渣砂漿的氯離子傳輸性能顯著低于普通水泥砂漿;水玻璃激發礦渣砂漿的表觀氯離子擴散系數較NaOH激發礦渣砂漿略高。 Abstract: The medium transmission mechanism of alkali activated slag mortar under unsaturated condition was studied by salt pool immersion test, and the effects of different activators and fly ash contents on the moisture and chloride ion transport performance of alkali activated slag mortar were analyzed. The results show that the capillary water absorption coefficient of slag mortar activated by water glass is small and the strength is high. Under the unsaturated conditions, the chloride ion transport performance of alkali activated slag mortar is lower than that of ordinary cement mortar. The apparent chloride ion transport coefficient of slag mortar activated by water glass is slightly higher than that of slag mortar activated by NaOH.
    羅具乾,萬小梅,王騰,等.堿激發礦渣砂漿的介質傳輸性能研究[J].混凝土與水泥制品,2022(7):101-104. LUO J Q,WAN X M,WANG T,et al.Study on Medium Transmission Performance of Alkali Activated Slag Mortar[J].China Concrete and Cement Products,2022(7):101-104.

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    摘 ? 要:研究了裝配式結構用高強套筒灌漿料的性能,通過試配并進行了流動度、強度和膨脹性試驗,優選出了優化配合比。同時基于優化配合比進行了水膠比、減水劑摻量和膨脹劑摻量對高強套筒灌漿料性能影響的研究。試驗結果表明,隨著水膠比(W/B)增加,流動度逐漸增大,但強度隨W/B增加呈現明顯降低趨勢;減水劑可有效改善流動度,而當摻量過多時對強度有一定的影響;膨脹率隨膨脹劑摻量增加呈現增長趨勢,但當摻量小于8.0%時,膨脹效果較差,摻量大于12.0%時,對流動度和強度產生不利影響。 Abstract: The properties of high-strong cementitious grout for prefabricated concrete structure are studied, and the optimum mix proportion is elected by the tests of fluidity, strength and expansibility. The roles of W/B and the content of superplasticizer or expanders in high-strong cementitious grout for coupler are researched respectively based on the optimum mix proportion. The test results show that the fluidity of the grout increases with the increasing of W/B, but its strength has significantly decreasing trend; the fluidity of the grout can be improved effectively by superplasticizer, but its strength will decrease if superplasticizer content is excessive; expansion rate of the grout increases with the increasing of expanders agent content, but the expansibility is poor when the content is less than 8.0%, and it has an adversely affect on the liquidity and strength of the grout when the content is greater than 12.0%.
    汪秀石,楊智良,吳照學.裝配式結構用高強套筒灌漿料性能試驗研究[J].混凝土與水泥制品,,2015(2):65-68. WANG X S,YANG Z L,WU Z X.Experimental Research on Performance of High-strong Cementitious Grouting for Prefabricated Concrete Structure[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(2):65-68.
    再生粗骨料強化處理工藝對再生混凝土性能的影響
    再生粗骨料強化處理工藝對再生混凝土性能的影響
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    2015年第6期
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    摘 ? 要:分別采用物理強化、化學強化和物理-化學復合強化三種不同的強化方式對簡單破碎再生粗骨料進行強化處理,并采用100%取代天然碎石制備再生粗骨料混凝土,研究了不同強化處理后的再生粗骨料對混凝土工作性能、力學性能、抗滲透性能和抗碳化性能的影響。結果表明,經過強化處理的再生粗骨料混凝土的各項性能均有不同程度的提高,其中經二次物理強化處理后的再生粗骨料混凝土的用水量較天然碎石混凝土僅增加了6kg/m3,其抗壓強度也達到最高值,接近于天然碎石混凝土;經二次物理強化和化學浸漬復合強化處理后的再生混凝土氯離子擴散系數降低了13.6%;三種不同的強化方式處理后,再生混凝土的碳化深度和碳化速度均有所降低。 Abstract: Three kinds of different strengthening technologies of physical enhancement, chemical enhancement and physical-chemical compound enhancement to strengthen the simple crushing recycled coarse aggregate are adopted, with 100% replaced natural gravel preparation of recycled coarse aggregate concrete, and the influences of the recycled coarse aggregate of different strengthening treatment on the working performance, mechanical properties, penetration resistance and carbonation resistance of concrete are studied. The research results show that, through strengthening treatment, recycled coarse aggregate concrete properties are improved to different degrees, the water consumption of recycled coarse aggregate concrete after the secondary physical strengthen treatment is only increased by 6kg/m3 than that of natural gravel concrete. The compressive strength also reached the highest value, close to the natural gravel concrete. The chloride ion diffusion coefficient of recycled concrete after the secondary physical-chemical compound strengthening treatment is reduced by 13.6%. The depth of carbonation and carbonation velocity decrease after three kinds of different strengthening treatments.
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    清水混凝土概念、研究現狀、存在問題及配合比設計方 綜述
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    郭偉,路林海,王龍志,等.清水混凝土概念、研究現狀、存在問題及配合比設計方法綜述[J].混凝土與水泥制品,2016(10):23-27. GUO W,LU L H,WANG L Z,et al.Summary for Concept, Research Status, Existing Problems and Mix Proportion Design of Fair-faced Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2016(10):23-27.
    新型裝配式建筑構件生產及其施工技術的研究與應用
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    • 范 玉1,4,徐 華2,黃 新3,黃繼戰4,馬北京4
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    摘 ? 要:通過對建筑PC構件的設計、生產、施工進行的研究,對建筑PC構件進行了再設計及優化,確定了合理的PC構件生產及其施工工藝方案,并對影響PC構件質量的相關因素進行了分析。 Abstract: Through the research on design of PC component, production and construction, ?construction PC component is carried out for re-design and optimization. The reasonable PC component production and construction technology program are determined, and factors affecting the quality of PC are analyzed.
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    引用本文
    摘 ? 要:采用球磨法將石墨烯納米片分散在水泥基體中,研究了石墨烯納米片摻量對水泥基材料抗折強度和抗壓強度的影響。實驗結果表明,適量的石墨烯納米片可均勻分散在水泥基體中,通過橋聯效應和拔出效應對水泥基材料起增強增韌作用,當石墨烯納米片摻量為0.04%時,石墨烯納米片與水泥基體界面結合良好,沒有明顯過渡層,試件3d抗折強度和抗壓強度分別提高了22.84%和23.61%。 Abstract: Graphene nanoplatelets (GNPs) were dispersed in the cement matrix by milling method. The effect of GNPs with different contents on the flexural strength and compressive strength of composites were studied. The results showed that well dispersed GNPs improved the mechanical properties of cement composites, owing to GNPs excellent pulling-out and bridging capability. When the GNPs content was 0.04%, the mechanical properties of cement composites were increased obviously. Its flexural and compressive strength increased by 22.84% and 23.61% respectively compared with the referee sample after curing 3 days. The interface between graphene nanoplatelets and cement was bonded well, with no obvious transition layer.
    王輝,劉愛紅,李航.石墨烯納米片對水泥基復合材料力學性能的影響[J].混凝土與水泥制品,2015(12):25-27. WANG H,LIU A H,LI H.Influence of Graphene Nanoplatelets on Mechanical Properties of Cement-based Composites[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(12):25-27.
    大型智能PC構件自動化生產線簡介
    大型智能PC構件自動化生產線簡介
    • 孫 紅1,孫 健1,吳玉厚1,趙凱軍2
    2015年第3期
    摘要
    引用本文
    摘 ? 要:根據混凝土工廠化生產的需要,闡述了大型智能PC構件生產線的組成部分、工藝過程和技術重點;分析了該生產線中蘊含的微觀物流、信息采集、分布式控制及多智能體的協同過程,總結了PC構件生產線的優點和技術創新突破點,可為大型智能PC構件全自動生產線的研制提供理論基礎和技術依據。 Abstract: According to the needs of the concrete factory production, the large scale intelligent automatic PC production line the technological process and technical keys of PC component are introduced, the cooperative process of microscopic logistics, information acquisition, distributed control and multi-agent systems are analyzed, the advantages and technology innovation of PC components production line are summarized, which can provide theoretical basis and technical basis for large scale intelligent automatic production line of PC components.
    孫紅,孫健,吳玉厚,等.大型智能PC構件自動化生產線簡介[J].混凝土與水泥制品,2015(3):45-48. SUN H,SUN J,WU Y H,et al.Introduction of Large Scale Intelligent PC Automatic Production Line[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(3):45-48.
    建筑垃圾再生微粉的研究現狀
    建筑垃圾再生微粉的研究現狀
    • 毛新奇1,2,屈文俊1,朱 鵬1
    2015年第8期
    摘要
    引用本文
    摘 ? 要:建筑垃圾再生微粉各項性能的研究是推進建筑垃圾資源化的重要基礎。根據近年來國內關于再生微粉的主要研究成果,對材料來源、制備工藝、工作性能、力學性能和耐久性能等方面進行了綜述,并對相關的影響因素進行了探討分析。 Abstract: Research on the properties of utilization regeneration of powder for construction waste is the important foundation of resource utilization of construction waste. Based on the recent domestic research on recycled powder, material source, manufacturing process, workability, mechanical properties and the durability are reviewed. Besides, the related influence factors are discussed and analyzed.
    毛新奇,屈文俊,朱鵬.建筑垃圾再生微粉的研究現狀[J].混凝土與水泥制品,2015(8):89-93. MAO X Q,QU W J,ZHU P.Study Status of Recycled Powder for Construction Waste[J].CHINA CONCRETE AND CEMENT PRODUCTS,2015(8):89-93.
    再生粗骨料及再生混凝土性能研究進展
    再生粗骨料及再生混凝土性能研究進展
    • 甘 福1,周脈席1,3,濮 琦2
    2018年第9期
    摘要
    引用本文
    摘 ? 要:結合國內外再生粗骨料混凝土的研究現狀,綜述了再生粗骨料性能、再生粗骨料混凝土性能、再生混凝土改性方法及改性后的混凝土性能等方面內容,展望了再生粗骨料及再生混凝土未來研究方向。 Abstract: Combining the study of recycled coarse aggregate concrete at home and abroad, the property of recycled coarse aggregate, the performance of recycled coarse aggregate concrete, the modified method of recycled concrete and the performance of modified concrete are reviewed, and the fature research direction on recycled coarse aggregate and recycled concrete is prospected.
    甘福,周脈席,濮琦.再生粗骨料及再生混凝土性能研究進展[J].混凝土與水泥制品,2018(9):102-107. GAN F,ZHOU M X,PU Q.Research Progress of Performance of Recycled Coarse Aggregate and Recycled Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2018(9):102-107.
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