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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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    第一期

    生態型超高強混凝土的制備與性能研究
    生態型超高強混凝土的制備與性能研究
    • 張志豪1,2,余 睿2,水中和2,王鑫鵬2,曾志軍3,潘躍進3
    2018年第1期
    摘要
    引用本文
    摘 要:通過最緊密堆積理論設計了生態型超高強混凝土(UHSC),研究了粉煤灰、礦粉以及礁石粉對UHSC流變性能、抗壓強度以及水化過程的影響,并對其環境影響進行了評價。結果表明,相比之下,礦粉的加入能夠降低UHSC漿體的屈服應力與塑性黏度,提高UHSC的流動度,塑性黏度最低降到3.04Pa·s,UHSC流動度增加到304mm;礦粉對UHSC的早期和后期抗壓強度提高較明顯,分別提高了14.4%、10%,而粉煤灰、礁石粉會降低UHSC的早期強度;礦粉、粉煤灰以及礁石粉會延緩UHSC的水化反應過程,降低72h的水化放熱總量,且降低UHSC對環境的影響。結合緊密堆積理論,采用輔助膠凝材料部分取代水泥、選擇較低的減水劑摻量(2.5%)的方法可以制備出生態型超高強混凝土。 Abstract:An eco-friendly Ultra-High Strength Concrete(UHSC) is prepared based on the optimized particle packing model. The effects of fly ash, slag and coral powders on the rheological properties, compressive strength and hydration process of UHSC are studied, and the impacts of UHSC on the environmental is evaluated. The results show that the addition of slag can reduce the yield stress and plastic viscosity of UHSC, the minimum value of plastic viscosity can achieve 3.04Pa·s, and it can increase slump flow diameter of UHSC to 304mm; In contrast with reference mixtures, the designed UHSC with slag have higher early and later compressive strength, increased by 14.4%, 10% respectively, while mixtures with fly ash and coral powders have obvious decline in early strength development. The addition of slag, fly ash and coral powders can significantly delay the UHSC hydration reaction and reduce the total amount of hydration heat in 72hours, Moreover, the ecological evaluation demonstrates that the designed UHSC with slag, fly ash and coral powders has relatively low environmental impact. Combined with the optimized particle packing model, the auxiliary cementitious material partially replaces the cement and the relatively low dosages of superplasticizer(2.5%) can produce the ecological ultra high strength concrete.
    張志豪,余睿,水中和,等.生態型超高強混凝土的制備與性能研究[J].混凝土與水泥制品,2018(1):1-5+16. ZHANG Z H,YU R,SHUI Z H,et al.Research on Preparation and Performance of Ecological Ultra-high Strength Concrete (UHSC)[J].China Concrete and Cement Products,2018(1):1-5+16.
    緩釋型聚羧酸減水劑的低溫制備工藝
    緩釋型聚羧酸減水劑的低溫制備工藝
    • 杜新康1,齊靈水2,莫祥銀1,林 軍1
    2018年第1期
    摘要
    引用本文
    摘 要:以異丁烯醇聚氧乙烯醚(HPEG)、丙烯酸(AA)為主要聚合單體,甲基丙烯酸羥乙酯(HEA)部分取代AA,巰基丙酸(MPA)為鏈轉移劑,通過雙氧水(H2O2)-抗壞血酸(Vc)引發,采用一步合成方法,在低溫條件下制備了一種緩釋型聚羧酸減水劑。研究分析了反應溫度、酸醚比、HEA取代量、MPA用量、H2O2與Vc摩爾比、滴加時間等因素對合成減水劑產品性能的影響。利用正交試驗,篩選出低溫條件下較優的合成工藝:反應溫度40℃,n(AA)∶n(HPEG)=4∶1,n(HEA)∶n(HPEG)=4.38:1,MPA用量(按HPEG單體質量分數計,下同)為0.65%,引發劑用量為1.17%,n(H2O2)∶n(Vc)=2.5∶1,滴加時間3h。當減水劑折固摻量為0.22%時,水泥初始凈漿流動度達到280mm,0.5h后凈漿流動度達到295mm,1h后凈漿流動度達到302mm,相同摻量下與其他減水劑產品相比具有更好的分散性和分散保持性,且膠砂減水率達到37.5%。此外,通過傅里葉紅外(FTIR)和熱重分析(TGA)等手段對共聚物進行了表征。 Abstract: Sustained-release polycarboxylate superplasticizer was prepared in one step at low-temperature by using modified polyether macromer(HPEG), acylic acid(AA) as raw materials, AA partly replaced by hydroethyl methacrylate(HEA), mecraptopropionic acid(MPA) as the chain transfer agent, initiated by hydrogen peroxide(H2O2)-Vitamin C(Vc). The effect of the reaction temperature, the molar ratio of n(AA) to n(HPEG), the replace amount of HEA, the amount of MPA, the molar ratio of n(H2O2) to n(Vc), and the adding time, etc. on the properties of the production were studied. The orthogonal experimental results indicate that the optimum technology of synthesis are shown as follows: the reaction temperature is 40℃, n(AA)∶n(HPEG)=4∶1, n(HEA)∶n(AA)=4.38∶1, the MPA addition (based on the weight of HPEG, similarly hereinafter) is 0.65%, the weight of initiator is 1.17%, n(H2O2)∶n(Vc)=2.5∶1, and the adding time is 3h. The results show that the initial fluidity of cement paste can exceed 280mm, exceed 295mm after 0.5h and exceed 302mm after 1h when the dosage of polycarboxylate water reducer is 0.22% of cement mass. The polycarboxylate superplastic synthesized has higher dispersity and dispersion retention with the same addition amount than others, and the water reducing rate of mortar reaches 37.5%. In addition, the copolymer is characterized by Fourier transform infrared spectrometer(FTIR) and thermal gravimetric analysis(TGA).
    杜新康,齊靈水,莫祥銀,等.緩釋型聚羧酸減水劑的低溫制備工藝[J].混凝土與水泥制品,2018(1):6-10. DU X K,QI L S,MO X Y,et al.Synthesis Process of Sustained-release Polycarboxylate Superplasticizer at Low-temperature[J].China Concrete and Cement Products,2018(1):6-10.
    二水石膏和普通水泥復摻對鋁酸鹽水泥基砂漿性能的影響
    二水石膏和普通水泥復摻對鋁酸鹽水泥基砂漿性能的影響
    • 丁汝茜1,高禮雄1,姚 燕2,榮 輝3,4,5,王海良4,張 磊3
    2018年第1期
    摘要
    引用本文
    摘 要:以鋁酸鹽水泥為主要膠凝材料,復摻二水石膏(11%、13%、15%、17%)和普通水泥(2%、4%、6%、8%),制備出鋁酸鹽水泥基砂漿。通過測試宏觀抗壓強度,同時采用物相分析(XRD)和微觀結構(SEM)兩種表征手段,探究了二水石膏和普通水泥復摻對鋁酸鹽水泥基砂漿性能的影響。研究結果表明:改性鋁酸鹽水泥基砂漿試件抗壓強度隨著養護齡期的增長而逐漸增加,且二水石膏摻量在11%~13%,普通水泥摻量在2%~4%時,鋁酸鹽水泥基砂漿力學性能較好;各鋁酸鹽水泥基砂漿28d齡期試件內部主要含有AFt和鋁膠,AFt、CAH10及C3AH6等水化產物相互交叉、搭接,鋁膠和C-S-H凝膠將各水化產物膠結在一起,且各水化產物數量的分布差異,造成其力學性能差異。 Abstract: Aluminum cementitious mortars were prepared using aluminum cement and combined admixture of dihydrate gypsum (11%、13%、15%、17%) and ordinary cement (2%、4%、6%、8%). The influence of combined admixture of dihydrate gypsum and ordinary cement on performance of aluminum cementitious mortar were studied by testing compressive strength, using phase analysis(XRD) and microstructure(SEM) as characterization means. The results show that the compressive strength of the modified aluminum cementitious mortars gradually increase with the increase of curing age, and when the amount of dihydrate gypsum is 11%~13% and the amount of ordinary cement is 2%~4%, the mechanical properties of aluminum cementitious mortars are better. The aluminum cementitious mortar specimens of 28d age contain AFt and Al(OH)3. Al(OH)3 , C-S-H gel and hydration products, such as AF, CAH10 and C3AH6, will be cemented together. The difference of the distribution of hydration products results in the difference of mechanical properties.
    丁汝茜,高禮雄,姚燕,等.二水石膏和普通水泥復摻對鋁酸鹽水泥基砂漿性能的影響[J].混凝土與水泥制品,2018(1):11-16. DING R Q,GAO L X,YAO Y,et al.Influence of Compound Admixture of Dihydrate Gypsum and Ordinary Cement on Properties of Aluminum Cementitious Mortar[J].China Concrete and Cement Products,2018(1):11-16.
    增稠劑對新拌水泥基材料性能影響的研究進展
    增稠劑對新拌水泥基材料性能影響的研究進展
    • 孫德易1,2,李化建1,2,易忠來1,2,黃法禮1,2,王 振1,2,謝永江1,2
    2018年第1期
    摘要
    引用本文
    摘 要:從工程適用性出發,介紹了水泥基材料用增稠劑的發展歷程、類型及其特點等,探討了增稠劑對水泥基材料抗離析性能改善機制,總結了增稠劑對水泥基材料流變性能、含氣量、凝結時間的影響規律,指出了摻增稠劑水泥基材料的研究趨勢。 Abstract: The history, type and thickening mechanism of cement-based materials were introduced from the practical point of view. The mechanism of improving the anti-segregatio performance of viscosity-enhancing admixtures to cement-based materials was explained.The rheological properties, the air content and the setting time of the cement-based materials were put forward, and the research trend of cement-based materials with viscosity-enhancing admixtures was pointed out.
    孫德易,李化建,易忠來,等.增稠劑對新拌水泥基材料性能影響的研究進展[J].混凝土與水泥制品,2018(1):17-21. SUN D Y,LI H J,YI Z L,et al.Study Progress of Effects of Viscosity-enhancing Admixtures on Fresh Cementitious Materials[J].China Concrete and Cement Products,2018(1):17-21.
    赫巴流體在圓管內層流流動理論及混凝土泵送應用實例
    赫巴流體在圓管內層流流動理論及混凝土泵送應用實例
    • 王衍偉1,冉千平1,劉加平2
    2018年第1期
    摘要
    引用本文
    摘 要:對赫巴流體在圓管內的層流流動問題進行理論分析,建立了流體在圓管截面上的流速分布、剪應力分布、流核速度、壁面剪應力、體積流量、平均流速、等效黏度等若干物理量的解析表達式和數值求解策略;以實際新拌混凝土的赫巴流體參數為例,考察了單位管長壓降與平均流速之間的關系。 Abstract: The steady-state, laminar flow problem of a Herschel-Bulkley (HB) fluid through a long circular pipe, a problem analogous to the Hagen-Poiseuille flow of a Newtonian fluid, was studied. The HB fluid model is a three-parameter, yield-power law model, where the three parameters are the yield stress, the fluid consistency index, and the flow behavior index, and certain special parameter values, the HB model can be simplified to the Bingham fluid model, the power-law fluid model and the simple Newtonian model, and is believed to better describe the rheological behaviors of complex fluids like sewage sludges, drilling fluids, cements pastes, mortars, and fresh concretes than the simpler Bingham or power-law fluid models. Rigorous analytical expressions are derived for the velocity profile, shear stress distribution, yield radius, average flow velocity, Metzner-Reed model parameters, etc. A numerical recipe is reported, and as a demonstration on the application side, the flow of a fresh concrete is investigated and is discussed in the context of concrete pumping. To simplify the relationship between pressure drop and average velocity, the concept of “equivalent fluid viscosity” is introduced.
    王衍偉,冉千平,劉加平.赫巴流體在圓管內層流流動理論及混凝土泵送應用實例[J].混凝土與水泥制品,2018(1):22-26. WANG Y W,RAN Q P,LIU J P.Flow Theory of Herschel-bulkley Fluid in Circular Pipes and Application of Concrete Pumping[J].China Concrete and Cement Products,2018(1):22-26.
    腐蝕環境下帶裂鋼筋混凝土的侵蝕作用研究
    腐蝕環境下帶裂鋼筋混凝土的侵蝕作用研究
    • 余 亮1,何 旸2,呂 健1,束 偉2
    2018年第1期
    摘要
    引用本文
    摘 要:以我國西北地區干濕循環鹽堿環境下氯離子對帶裂工作的鋼筋混凝土侵蝕破壞為背景,設計了預置不同寬度表面裂縫的混凝土試件,研究了在若干個干濕循環內不同配比帶裂鋼筋混凝土的氯離子侵蝕的程度與速率。結果表明:高性能耐腐蝕混凝土能夠有效延緩氯離子滲透侵蝕的時間,相對減輕侵蝕程度;鋼筋阻銹劑能夠顯著提升鋼筋混凝土抗氯離子侵蝕能力;在帶裂工作的情況下,高性能耐腐蝕混凝土對氯離子侵蝕作用的抑制更為明顯。 Abstract: Based on the erosion of chloride ions to the reinforced concrete with cracks under dry and wet cyclic saline alkali environment in the Northwest China, concrete specimens with different width surface cracks are designed in the experiment to investigate the degree and rate of chloride corrosion in several dry wet cycles of reinforced concrete. The results illustrate that high performance corrosion resistant concrete can effectively retard chloride penetration time and relatively reduce the erosion. The reinforcing bar rustproof can remarkably improve the resistance to the chloride ion erosion of concrete. In case of load with cracks, it is more obvious that the high performance corrosion resistant concrete possess a better ability to restrain the chloride ion erosion.
    余亮,何旸,呂健,等.腐蝕環境下帶裂鋼筋混凝土的侵蝕作用研究[J].混凝土與水泥制品,2018(1):27-31. YU L,HE Y,LYU J,et al.Research on Erosion of Reinforced Concrete with Cracks under Corrosive Environment[J].China Concrete and Cement Products,2018(1):27-31.
    百米基坑巨型柱不同配合比水泥水化熱研究
    百米基坑巨型柱不同配合比水泥水化熱研究
    • 劉 哲,燕雷鳴,曾 維,李 曦,蔣 震,冷 政
    摘要
    引用本文
    摘 要:通過對不同生產工藝的水泥水化放熱量進行試驗,得到各水泥的水化放熱曲線和擬合公式,可以用于預測不同時間段內水化放熱量,并結合各工藝水泥的抗壓強度對水泥進行了選擇。對基準C60P10和C40P10進行優化,同時,通過四種配合比膠材的水化熱量化試驗,發現降低水泥用量,增加粉煤灰和礦粉用量可以有效降低混凝土水化熱,其中,優化后C60P10的7d水化熱降低10.4%,優化后C40P10的7d水化熱降低25.4%。 Abstract: The experiment with heat of hydration of different cement craft in the mixing stations was carried out, the hydrothermal curve and the fitting formula for each cement were obtained. Different periods of heat of hydration of different cement craft could be properly predicted. The compressive strength of each process cement is combined to choose the cement. The mixture ratio benchmark C60P10 and C40P10 was optimized with heat of hydration of four kinds of rubber mixture material quantitative test. The results show that reducing the dosage of cement, increasing the dosage of fly ash and mineral powder can effectively reduce heat of hydration of concrete, including after optimization, the 7d hydration heat of C60P10 is reduced by 10.4%, the optimization of C40P10 is reduced by 25.4%.
    劉哲,燕雷鳴,曾維,等.百米基坑巨型柱不同配合比水泥水化熱研究[J].混凝土與水泥制品,2018(1):32-34+46. LIU Z,YAN L M,ZENG W,et al.Study on Heat of Hydration of Huge Columns in 100-meter Pit with Different Mix Proportion[J].China Concrete and Cement Products,2018(1):32-34+46.
    預制混凝土綜合管廊接口密封設計方法
    預制混凝土綜合管廊接口密封設計方法
    • 曹生龍
    2018年第1期
    摘要
    引用本文
    摘 要:結合多年實際工程經驗,總結了近幾年工程中預制混凝土綜合管廊接口出現的問題,并提出了相應推薦的接口形式,最后給出了預制混凝土綜合管廊的接口密封設計方法,以期為預制混凝土綜合管廊接口密封設計提供參考,促進預制混凝土綜合管廊的工程質量進一步改進提高。 Abstract: Based on years of practical experience, the interface problems of precast concrete utility tunnel in recent years are concluded, the corresponding interface forms recommended are put forward, the interface sealing design methods of precast concrete utility tunnel are given finallys, which can provide references for the sealing design of precast concrete utility tunnel and promote the further improvement of quality of precast concrete utility tunnel gallery engineering.
    曹生龍.預制混凝土綜合管廊接口密封設計方法[J].混凝土與水泥制品,2018(1):35-42. CAO S L.Methods for Seal Design of Interface of Precast Concrete Utility Tunnel[J].China Concrete and Cement Products,2018(1):35-42.
    北美PCCP管道生產及安裝考察紀實
    北美PCCP管道生產及安裝考察紀實
    • 宋克軍
    2018年第1期
    摘要
    引用本文
    摘 要:針對PCCP發展過程中出現的一些問題,結合兩次對北美地區PCCP生產的考察經歷,簡要介紹了北美地區PCCP生產制造、安裝技術等情況,以期學習北美地區先進的PCCP生產技術和管理經驗,為國內PCCP生產管理提供借鑒。 Abstract: In view of the problems in the development of PCCP, combined with the two study experiences on the production of PCCP in North America, in order to learn advanced PCCP production technology and management experience in North America, the manufacturing and installation technology of PCCP in North America were briefly introduced,which provides reference for domestic PCCP production.
    宋克軍.北美PCCP管道生產及安裝考察紀實[J].混凝土與水泥制品,2018(1):43-46. SONG K J.Manufacturing and Installation of PCCP Pipeline in North America[J].China Concrete and Cement Products,2018(1):43-46.
    預應力混凝土空心樁換算截面受拉邊緣彈性抵抗矩公式推導及分析
    預應力混凝土空心樁換算截面受拉邊緣彈性抵抗矩公式推導及分析
    • 魏宜齡
    2018年第1期
    摘要
    引用本文
    摘 要:根據預應力混凝土空心樁配筋均勻布置的特點,推導出預應力混凝土管樁和空心方樁的換算截面受拉邊緣彈性抵抗矩公式,并做簡單分析。以期在標準設計中采用。 Abstract: According to the uniform layout of reinforcement of prestressed concrete hollow pile, the formula for elastic resistance moment of the transfer section of prestressed concrete tubular pile and hollow square pile is derived, and analyzed simply. It is expected to be used in standard design.
    魏宜齡.預應力混凝土空心樁換算截面受拉邊緣彈性抵抗矩公式推導及分析[J].混凝土與水泥制品,2018(1):47-49. WEI Y L.Formula Derivation and Analysis on Elastic Resistance Moment of the Converted Section of Prestressed Concrete Hollow Piles at the Drawing Edge[J].China Concrete and Cement Products,2018(1):47-49.
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