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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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    2022

    盾構隧道回填用自流平泡沫混凝土試驗研究
    盾構隧道回填用自流平泡沫混凝土試驗研究
    • 李春寶1,李笑天1,李 申2,管 笛2,肖 暢1,秦鵬舉3,叢子欽1,張建華4
    2022年第8期
    摘要
    引用本文
    摘 ? 要:通過正交試驗研究了水灰比、HTFC摻合料、減水劑、發泡劑對泡沫混凝土性能的影響,改進了用于輸送、生產和澆筑的施工設備。結果表明,各因素對泡沫混凝土流動度的影響順序大小為:發泡劑摻量>水灰比>減水劑摻量>HTFC摻合料摻量。滿足實際施工要求的自流平泡沫混凝土的配合比為:水灰比0.5~0.6、HTFC摻合料摻量35%~40%、減水劑摻量1.00%、發泡劑摻量3.0%~3.5%。 Abstract: The effects of water-cement ratio, HTFC admixtures, water reducing agent and foaming agent on the properties of foamed concrete were studied through orthogonal test, and the construction equipments for transportation, production and pouring were improved. The results show that the influence order of various factors on the fluidity of foamed concrete is as follows: foaming agent content > water-cement ratio > water reducing agent content > HTFC admixture content. The mix proportion of self-leveling foamed concrete meeting the actual construction requirements is that the water-cement ratio is 0.5~0.6, the HTFC admixture content is 35%~40%, the water reducing agent content is 1.00%, and the foaming agent content is 3.0%~3.5%.
    李春寶,李笑天,李申,等.盾構隧道回填用自流平泡沫混凝土試驗研究[J].混凝土與水泥制品,2022(8):83-86. LI C B,LI X T,LI S,et al.Experimental Study on Self-leveling Foamed Concrete For Shield Tunne Backfill[J].China Concrete and Cement Products,2022(8):83-86.
    高性能復合礦物摻合料的制備及膠砂性能研究
    高性能復合礦物摻合料的制備及膠砂性能研究
    • 李仕彬1,王文濤1,黃從運2,馬繼漢2
    2022年第8期
    摘要
    引用本文
    摘 要:分析了礦渣、鋼渣、建筑垃圾和循環灰的活性,研究了活化劑的類型(M型、N型、P型、Q型)和摻量對摻礦物合料膠砂性能的影響,通過SEM和XRD分析了活化劑的作用機理。結果表明:4種礦物摻合料中,礦渣的活性指數最大,而循環灰的活性指數最??;不同類型的活化劑均能有效提高摻復合礦物摻合料膠砂的強度,其中,P型活化劑的提高效果最好,其適宜摻量為2.5%;活化劑的摻入促進了AFt和C-S-H凝膠的生成,從而提升了強度。 Abstract: The activity of slag, steel slag, construction waste and circulating ash were analyzed. The effects of the type (M-type, N-type, P-type, Q-type) and content of activator on the properties of mortar mixed with composite mineral admixtures were studied. The action mechanism of activators was analyzed by SEM and XRD. The results show that among the four mineral admixtures, the activity index of slag is the largest, while that of circulating ash is the smallest. Different types of activators can effectively improve the strength of mortar mixed with composite mineral admixtures. Among them, the P-type activator has the best effect, and its appropriate content is 2.5%. The activator promotes the formation of AFt and C-S-H gel, thus enhancing the strength.
    李仕彬,王文濤,黃從運,等.高性能復合礦物摻合料的制備及膠砂性能研究[J].混凝土與水泥制品,2022(8):87-90,95. LI S B,WANG W T,HUANG C Y,et al.Study on Preparation of High Performance Composite Mineral Admixtures and Properties of Mortar[J].China Concrete and Cement Products,2022(8):87-90,95.
    玻璃粉-粉煤灰基地聚合物混凝土力學及微觀性能研究
    玻璃粉-粉煤灰基地聚合物混凝土力學及微觀性能研究
    • 陳劍剛1,潘澤濱2,馬云龍1,舒本安1,成 浩1,楊騰宇1
    2022年第8期
    摘要
    引用本文
    摘 ? 要:研究了玻璃粉的粒徑和取代率、復合堿激發劑的模數和濃度對玻璃粉-粉煤灰基地聚合物混凝土(GAGC)力學性能和微觀結構的影響。結果表明:隨著玻璃粉取代率的增加,GAGC的抗壓強度呈先增大后減小的趨勢,最佳取代率為40%;隨著玻璃粉粒徑的增大,GAGC體系中的凝膠體和團簇結構減少,微觀結構由密實轉為松散,力學性能降低,最優粒徑為(10±2)μm;隨著復合堿激發劑模數和濃度的增大,GAGC的抗壓強度呈先增大后減小的趨勢,最佳模數和濃度分別為1.5和1.4 mol/kg。 Abstract: The effects of particle size and substitution rate of glass powder, modulus and concentration of composite alkali activator on the mechanical properties and microstructure of glass powder and fly ash based geopolymer concrete (GAGC) were studied. The results show that the compressive strength of GAGC increases first and then decreases with the increase of glass powder substitution rate, and the optimal substitution rate is 40%. With the increase of glass powder particle size, the gel and cluster structures in GAGC system decrease, the microstructure changes from dense to loose, and the mechanical properties decrease, and the optimal particle size is(10±2)μm. With the increase of the modulus and concentration of composite alkali activator, the compressive strength of GAGC increases first and then decreases, and the optimal modulus and concentration are 1.5 and 1.4 mol/kg respectively.
    陳劍剛,潘澤濱,馬云龍,等.玻璃粉-粉煤灰基地聚合物混凝土力學及微觀性能研究[J].混凝土與水泥制品,2022(8):91-95. CHEN J G,PAN Z B,MA Y L,et al.Study on Mechanical and Microscopic Properties of Glass Powder and Fly Ash Based Geopolymer Concrete[J].China Concrete and Cement Products,2022(8):91-95.
    機制砂混凝土抗壓強度分析及預測
    機制砂混凝土抗壓強度分析及預測
    • 陶松濤1,2,延永東1,鄭玉龍1,劉甲琪1,梁曉封1,王 鑫1
    2022年第8期
    摘要
    引用本文
    摘 ? 要:為了探究機制砂混凝土的抗壓強度變化規律,進行了不同機制砂替代率(0、30%、50%、70%)、粉煤灰摻量(0、20%、30%、40%)和機制砂石粉含量(0、5.8%、11.6%)混凝土試件的抗壓強度試驗,并結合試驗數據建立了BP神經網絡模型預測抗壓強度。結果表明:隨著機制砂替代率的增加,試件的7 d、28 d抗壓強度呈先增大后減小的趨勢,且在機制砂替代率為50%時達到最大,機制砂替代率對試件的60 d抗壓強度影響較??;摻入粉煤灰使試件的早期抗壓強度降低,但30%摻量的粉煤灰有利于提高試件的60 d抗壓強度;隨著機制砂石粉含量的增加,試件的7 d抗壓強度先增大后減小,28 d、60 d抗壓強度則逐漸增大;建立的機制砂混凝土28 d抗壓強度預測模型的精度較高。 Abstract: In order to explore the change law of the compressive strength of manufactured sand concrete, the compressive strength tests of concrete specimens with different manufactured sand replacement rates(0, 30%, 50%, 70%), fly ash contents(0, 20%, 30%, 40%) and stone powder contents(0, 5.8%, 11.6%) in manufactured sand were carried out. Combined with the test datas, the BP neural network model was established to predict the compressive strength. The results show that the 7 d and 28 d compressive strength of the specimen increase first and then decrease with the increase of manufactured sand replacement rate, and reaches the maximum when the manufactured sand replacement rate is 50%. The manufactured sand replacement rate has little effect on the 60 d compressive strength of the specimen. Adding fly ash reduces the early compressive strength of the specimen, but 30% fly ash is beneficial to improve the 60 d compressive strength of the specimen. With the increase of stone powder content in manufactured sand, the 7 d compressive strength of the specimen first increases and then decreases, and the 28 d and 60 d compressive strength increase gradually. The established model for predicting the 28 d compressive strength of manufactured sand concrete has high accuracy.
    陶松濤,延永東,鄭玉龍,等.機制砂混凝土抗壓強度分析及預測[J].混凝土與水泥制品,2022(8):96-100,104. TAO S T,YAN Y D,ZHENG Y L,et al.Analysis and Prediction of Compressive Strength of Manufactured Sand Concrete[J].China Concrete and Cement Products,2022(8):96-100,104.
    農業廢棄物在混凝土中的資源化利用研究進展
    農業廢棄物在混凝土中的資源化利用研究進展
    • 張思雨1,屈曉明2,李長江1,于 琦1,許 冬1,羅金壘3
    2022年第8期
    摘要
    引用本文
    摘 ? 要:介紹了農業廢棄物在資源化利用過程中存在的問題及在混凝土中的應用研究現狀,并提出了相應的改善措施,可為拓寬農業廢棄物的資源化利用途徑提供參考,并推進我國鄉村生態振興建設和碳中和進程。 Abstract: The problems existing in the process of resource utilization of agricultural waste and the research status of its application in concrete are introduced, and the corresponding improvement measures are put forward, which can provide a reference for broadening the resource utilization of agricultural waste, and further promote the process of rural ecological revitalization and carbon neutrality in China.
    張思雨,屈曉明,李長江,等.農業廢棄物在混凝土中的資源化利用研究進展[J].混凝土與水泥制品,2022(8):101-104. ZHANG S Y,QU X M,LI C J,et al.Research Progress on Resource Utilization of Agricultural Waste in Concrete[J].China Concrete and Cement Products,2022(8):101-104.
    表面硬度法檢測灌漿料實體強度試驗研究
    表面硬度法檢測灌漿料實體強度試驗研究
    • 趙建華1,凌良建2,呂 嘉2,謝慧晟2
    2022年第8期
    摘要
    引用本文
    摘 ? 要:研究了灌漿料標準試塊抗壓強度隨齡期的變化規律,分析了表面硬度法檢測灌漿料實體抗壓強度的影響因素,建立了工程現場灌漿料表面硬度與抗壓強度之間的測強曲線,并通過分析工程現場構件注漿孔端與出漿孔端灌漿料的表面硬度差異確定了合適的檢測部位。結果表明:灌漿料抗壓強度在前期增長較快,14 d后增長變緩,且14 d抗壓強度能夠達到28 d抗壓強度的90%左右,故建議表面硬度法檢測灌漿料實體抗壓強度的最佳齡期應在14 d之后;出漿孔端灌漿料的表面硬度與抗壓強度之間的相關性較差,而注漿孔端灌漿料的表面硬度與抗壓強度之間的相關性較好,故建議表面硬度法檢測灌漿料實體抗壓強度的檢測部位應選擇注漿孔端;根據注漿孔端灌漿料的表面硬度與標準試塊表面硬度之間的差異確定了二者之間的表面硬度修正量,可為表面硬度法檢測灌漿料實體抗壓強度的實際應用提供參考。 Abstract: The variation law of the compressive strength of the grouting material standard test block with age was studied, the influencing factors of testing the compressive strength of grouting material by surface hardness method were analyzed, and the strength-measurement curve between the surface hardness and compressive strength of grouting material in the project site was established, and the appropriate testing position was determined by analyzing the surface hardness difference between the grouting hole and the outlet hole of the components in the project site. The results show that the compressive strength of grouting material increases rapidly in the early stage, and slows down after 14 d, and the 14 d compressive strength can reach about 90% of the 28 d compressive strength. Therefore, it is suggested that the best age for testing the solid compressive strength of grouting materials by surface hardness method should be after 14 d. The correlation between the surface hardness at the location of the outlet hole and the compressive strength of the grouting material is poor, while the correlation between the surface hardness at the location of the grouting hole and the compressive strength of the grouting material is good. Therefore, it is suggested that the grouting hole should be selected as the detection position for testing the compressive strength of grouting material by surface hardness method. According to the difference between the surface hardness of the grouting hole position and the surface hardness of the grouting material standard test block, the surface hardness correction between the two is determined, which can provide a reference for the practical application of the surface hardness method to detect the compressive strength of the grouting material.
    趙建華,凌良建,呂嘉,等.表面硬度法檢測灌漿料實體強度試驗研究[J].混凝土與水泥制品,2022(8):78-82. ZHAO J H,LING L J,LYU Jia,et al.Experimental Study on Testing Solid Strength of Grouting Materials by Surface Hardness Method[J].China Concrete and Cement Products,2022(8):78-82.
    BIM技術在裝配整體式結構正向設計中的應用研究
    BIM技術在裝配整體式結構正向設計中的應用研究
    • 劉 爽1,龔 鑘1,2,周 理1.2
    2022年第8期
    摘要
    引用本文
    摘 ? 要:以某大學裝配式框架結構宿舍項目為例,分析了BIM技術應用于裝配式建筑正向設計的流程,研究了預制構件拆分、構件節點鋼筋碰撞避讓等問題,可為裝配整體式結構的設計、生產及施工提供參考。 Abstract:Taking the prefabricated frame structure dormitory project of a university as an example, the process of applying BIM technology to the forward design of prefabricated buildings is analyzed, and the problems such as the separation of prefabricated components and collision avoidance of reinforcement at component nodes were studied, which can provide a reference for the design, production and construction of assembled integral structures.
    劉爽,龔鑘,周理.BIM技術在裝配整體式結構正向設計中的應用研究[J].混凝土與水泥制品,2022(8):64-69. LIU S,GONG L,ZHOU L.Study on the Application of BIM Technology in Forward Design of Assembled Integral Structure[J].China Concrete and Cement Products,2022(8):64-69.
    泡沫混凝土復合保溫墻板研究
    泡沫混凝土復合保溫墻板研究
    • 項澤強1,李曉寧1,趙 敦1,顏小波1,梁澤鋒2,孟志武1
    2022年第8期
    摘要
    引用本文
    摘 ? 要:以普通硅酸鹽水泥、粉煤灰、硫鋁酸鹽水泥、石膏為膠凝材料,摻入減水劑、保水劑、纖維、發泡劑等制備了泡沫混凝土,通過分析發泡劑穩泡時間、泡沫混凝土的凝結時間、抗壓強度和膨脹率確定了最優配合比,并對最優配合比下的墻板進行了中試試驗。結果表明:發泡劑的最佳穩泡時間為1 h以內;當m普通硅酸鹽水泥∶m粉煤灰∶m硫鋁酸鹽水泥∶m石膏=5.0∶4.0∶0.4∶0.6時,泡沫混凝土的初凝時間小于60 min,抗壓強度>3.5 MPa,膨脹率達到鎂基水泥水平,抗開裂性能良好,且此配合比下的墻板各項性能指標良好。 Abstract: Foamed concrete was prepared by using ordinary portland cement, fly ash, sulfoaluminate cement and gypsum as cementing materials, adding water reducing agent, water retaining agent, fiber and foaming agent. The optimal mix proportion was determined by analyzing the foam stabilization time of the foaming agent and the setting time, the compressive strength and the expansion rate of foamed concrete, and the pilot test was carried out for the wallboard under the optimal mix proportion. The results show that the optimum foam stabilization time of the foaming agent is within 1 h. When mordinary portland cement ∶ mfly ash ∶ msulphoaluminate cement ∶ mgypsum is 5.0∶4.0∶0.4∶0.6, the initial setting time of foamed concrete is less than 60 min, the compressive strength is more than 3.5 MPa, the expansion rate reaches the level of magnesium based cement, the cracking resistance is good, and all performance indexes of wallboard under this mix proportion are good.
    項澤強,李曉寧,趙敦,等.泡沫混凝土復合保溫墻板研究[J].混凝土與水泥制品,2022(8):70-73,82. XIANG Z Q,LI X N,ZHAO D,et al.Study on Foamed Concrete Composite Insulation Wallboards[J].China Concrete and Cement Products,2022(8):70-73,82.
    后澆自密實混凝土拼接疊合梁抗彎性能試驗研究
    后澆自密實混凝土拼接疊合梁抗彎性能試驗研究
    • 薛建英,曹小飛
    2022年第8期
    摘要
    引用本文
    摘 ? 要:設計制作了5根后澆自密實混凝土拼接疊合梁,預制部分用C30普通混凝土,后澆部分用C30自密實混凝土;同時設計了1根用C30普通混凝土澆筑的整澆梁作為對照梁。通過抗彎性能試驗,得到了試驗梁的跨中撓度、裂縫發展規律和破壞特征。結果表明:拼接疊合梁的受彎破壞形態與對照梁類似,均為適筋破壞;增大拼接疊合面的粗糙度可以提高拼接疊合梁的抗彎承載力,但抗彎承載力與粗糙度不成正相關關系,這與預制部分混凝土中的粗骨料粒徑和級配有關;采用箍筋加密和拼接疊合面插筋的方式均可以保證拼接疊合梁的抗彎承載力。 Abstract: Five post-cast self-compacting concrete spliced composite beams were designed, the precast part was poured with C30 ordinary concrete, and the post-cast part was poured with C30 self-compacting concrete. In addition, one cast-in-place beam poured with C30 ordinary concrete was designed as the control beam. Through the flexural performance test, the mid-span deflection, crack development law and failure characteristics of test beams were obtained. The results show that the flexural failure form of the spliced composite beam is similar to that of the control beam, both of which are the appropriate reinforcement failure. Increasing the roughness of the spliced composite surface can improve the flexural capacity of the spliced composite beam, but the flexural capacity is not positively related to the roughness, which is related to the particle size and gradation of coarse aggregate in the precast concrete. Both stirrup encryption and spliced reinforcement can improve the flexural capacity of the spliced composite beam.
    薛建英,曹小飛.后澆自密實混凝土拼接疊合梁抗彎性能試驗研究[J].混凝土與水泥制品,2022(8):74-77,86. XUE J Y,CAO X F.Experimental Study on Flexural Performance of Post-cast Self-compacting Concrete Spliced Composite Beams[J].China Concrete and Cement Products,2022(8):74-77,86.
    混雜纖維UHPC力學性能試驗研究
    混雜纖維UHPC力學性能試驗研究
    • 李福海1,李繼蕓1,唐慧琪1,穆勃江1,姜怡林1,馮 立2
    2022年第8期
    摘要
    引用本文
    摘 ? 要:研究了水膠比、砂膠比、鋼纖維摻量、合成粗纖維摻量以及混摻鋼纖維和合成粗纖維對超高性能混凝土(UHPC)力學性能的影響。結果表明:水膠比越小、砂膠比越大,UHPC的抗折、抗壓強度越高;單摻鋼纖維時,UHPC的抗折、抗壓強度隨鋼纖維摻量的增加總體呈增大趨勢,鋼纖維的最佳摻量為2.0%;單摻合成粗纖維時,UHPC的抗折、抗壓強度隨合成粗纖維摻量的增加總體呈先增大后減小的趨勢,合成粗纖維的最佳摻量為2.0%;混摻鋼纖維和合成粗纖維且鋼纖維摻量≤2.0%時,合成粗纖維摻量宜≤1.0%。 Abstract: The effects of water-binder ratio, sand-binder ratio, steel fiber content, synthetic coarse fiber content, and blend of steel fiber and synthetic coarse fiber on the mechanical properties of ultra-high performance concrete(UHPC) were studied. The results show that the smaller the water-binder ratio and the larger the sand-binder ratio, the higher the flexural and compressive strength of UHPC. When the steel fiber is mixed alone, the flexural and compressive strength of UHPC generally increase with the increase of the steel fiber content, and the optimal steel fiber content is 2.0%. When the synthetic coarse fiber is mixed alone, the flexural and compressive strength of UHPC generally increase first and then decrease with the increase of the synthetic coarse fiber content, and the optimal synthetic coarse fiber content is 2.0%. When mixing steel fiber and synthetic coarse fiber and the content of steel fiber is ≤2.0%, the content of synthetic coarse fiber should be ≤1.0%.
    李福海,李繼蕓,唐慧琪,等.混雜纖維UHPC力學性能試驗研究[J].混凝土與水泥制品,2022(8):56-59. LI F H,LI J?Y,TANG H?Q,et al.Experimental Study on Mechanical Properties of Hybrid Fiber UHPC[J].China Concrete and Cement Products,2022(8):56-59.
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