节能降碳_2024_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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节能降碳

超细低碳胶凝材料的制备及应用研究

崔雷1，范凯1，周桃义2，周新2，陈浩2，王裕银3，王麟4，柏立果5，陈勤丰6，马友来6，郦军科7，刘斌8

2024年第1期

摘要

引用本文

摘要：为了在减碳的同时实现建材企业的降本增效，以矿渣粉和粉煤灰（质量比5∶5）为主要原材料，制备了一种超细低碳胶凝材料，研究了其对混凝土和水泥性能的影响。结果表明：在混凝土制备过程中，用适量超细低碳胶凝材料等质量部分替代水泥，可以有效提高混凝土的力学性能；在水泥生产过程中，用超细低碳胶凝材料等质量替代0~15%的水泥原料，对水泥的标准稠度用水量和凝结时间影响不大，但能有效提高水泥的抗折、抗压强度。研究结果可为建筑行业减碳增效途径的选择提供参考。 Abstract: In order to achieve cost reduction and efficiency improvement for building materials enterprises while reducing carbon emissions, a ultra-fine low-carbon cementitious material was prepared by using slag powder and fly ash (the mass ratio of 5∶5) as the main raw materials, and its impact on the properties of concrete and cement was studied. The results show that in the process of concrete preparation, replacing cement with appropriate amounts of ultra-fine low-carbon cementitious materials can effectively improve the mechanical properties of concrete. In the process of cement production, replacing 0~15% of cement raw materials with ultra-fine low-carbon cementitious materials has little effect on the standard consistency water consumption and setting time of cement, but can effectively improve the flexural and compressive strength of cement. The research results can provide reference for the selection of carbon reduction and efficiency improvement pathways in the construction industry.

崔雷,范凯,周桃义,等.超细低碳胶凝材料的制备及应用研究[J].混凝土与水泥制品,2024(1):87-89. CUI L,FAN K,ZHOU T Y,et al.Preparation and application research of ultra-fine low-carbon cementitious materials[J].China Concrete and Cement Products,2024(1):87-89.

矿渣-脱硫石膏-水泥复合胶凝材料的性能研究

王安辉1，黄虎2，*，张艳芳1，倪娇娇1，荣辉2，3，*，戴骁蒙4，刘鑫4，樊立龙5，赵健5

2024年第1期

摘要

引用本文

摘要：制备了矿渣-脱硫石膏-水泥复合胶凝材料，通过抗压强度试验确定了其最佳配合比，并进行了微观机理分析。抗压强度结果表明：相同水泥掺量（10%）下，随着脱硫石膏掺量的增加，试件的28 d抗压强度先增大后减小；相同m矿渣∶m脱硫石膏（8.0∶1.0）下，随着水泥掺量的增加，试件的28 d抗压强度先增大后减小；最佳m矿渣∶m脱硫石膏∶m水泥为75.5∶9.5∶15.0。28 d微观结果表明：随着脱硫石膏掺量的增加，水化产物生成量增多，AFt由针状变为粗棒状，但同时CaSO4·2H2O量也较多；随着水泥掺量的增加，CaSO4·2H2O和矿渣颗粒减少，无胶结性的SiO2增多，AFt由针状先变为粗棒状再变为针状和粗棒状共同存在。 Abstract: A slag-desulfurization gypsum-cement composite cementitious material was prepared, and its optimal mix proportion was determined through compressive strength tests, and the microscopic analysis was conducted. The compressive strength results show that under the same cement content (10%), with the increase of desulfurization gypsum content, the 28 d compressive strength of the specimens first increases and then decreases. Under the same mslag ∶ mdesulfurization gypsum (8.0:1.0), with the increase of cement content, the 28 d compressive strength first increases and then decreases. The optimal mslag ∶ mdesulfurization gypsum ∶ mcement is 75.5∶9.5∶15.0. The 28 d microscopic results show that with the increase of desulfurization gypsum content, the amount of hydration products increases, and the AFt changes from needle shaped to coarse rod shaped, but the amount of CaSO4·2H2O is higher. With the increase of cement content, the amount of CaSO4·2H2O and slag particles decrease, and non-cementitious SiO2 increases, and the AFt changes from needle shaped to coarse rod shaped first, and then to needle shaped and coarse rod shaped coexisting.

王安辉,黄虎,张艳芳,等.矿渣-脱硫石膏-水泥复合胶凝材料的性能研究[J].混凝土与水泥制品,2024(1):90-93. WANG A H,HUANG H,ZHANG Y F,et al.Performance study of slag-desulfurization gypsum-cement composite cementitious material[J].China Concrete and Cement Products,2024(1):90-93.

再生细骨料混凝土的性能研究进展

陈春红1，2，俞江1，刘荣桂2，*，朱平华1，王磊1，伍金龙1，陈云春1

2024年第1期

摘要

引用本文

摘要：合理使用再生细骨料（以下简称RFA）可同时解决建筑垃圾的资源化利用问题和天然砂、石过度开采引起的环境问题。介绍了RFA的颗粒形状、空隙率、吸水率、有害物质含量等性能，总结了RFA的性能强化措施，综述了再生细骨料混凝土（以下简称RFAC）的工作性、力学性能和耐久性能，并对其机理进行了分析，可为RFA的进一步推广应用提供参考。 Abstract: The rational use of recycled fine aggregate(RFA) can simultaneously solve the problem of resource utilization of construction waste and environmental problems caused by excessive exploitation of natural sand and stone. The particle shape, porosity, water absorption and harmful substance content of RFA are introduced, and the performance strengthening measures of RFA are summarized. The workability, mechanical properties and durability of recycled fine aggregate concrete(RFAC) are summarized, and its mechanism is analyzed, which can provide a reference for the further promotion and application of RFA.

陈春红,俞江,刘荣桂,等.再生细骨料混凝土的性能研究进展[J].混凝土与水泥制品,2024(1):94-99. CHEN C H,YU J,LIU R G,et al.Research progress on performance of recycled fine aggregate concrete[J].China Concrete and Cement Products,2024(1):94-99.

水泥浆废水对MgO激发矿渣胶凝材料水化特性的影响

陶良敬，荆喆，谭园园

2024年第1期

摘要

引用本文

摘要：研究了水泥浆废水（以下简称CWw）等质量替代0、20.0%、25.0%、33.3%、50.0%的水对MgO激发矿渣胶凝材料（以下简称WAAS）水化特性的影响，并测试了其抗压强度和孔结构。结果表明：掺入CWw有效促进了WAAS的水化进程，且CWw掺量越大，WAAS的主要水化放热峰越显著，热失重量越大，水化产物生成量越多；随着CWw掺量的增加，WAAS的抗压强度先增大后减小，最佳掺量为33.3%；WAAS的累计孔隙率随着CWw掺量的增加而减小，微观结构更密实。 Abstract: The effects of replacing 0, 20.0%, 25.0%, 33.3% and 50.0% of water with cement slurry wastewater (CWw) on the hydration characteristics of MgO activated slag cementitious materials(WAAS) were studied, and the compressive strength and pore structure were tested. The results show that the addition of CWw effectively promotes the hydration process of WAAS, and the larger the CWw content, the more significant the main hydration heat release peak of WAAS, the greater the heat loss weight, and the more hydration products are generated. With the increase of CWw content, the compressive strength of WAAS first increases and then decreases, and the optimal content is 33.3%. The cumulative porosity of WAAS decreases with the increase of CWw content, resulting in a denser microstructure.

陶良敬,荆喆,谭园园.水泥浆废水对MgO激发矿渣胶凝材料水化特性的影响[J].混凝土与水泥制品,2024(1):100-103. TAO L J,JING Z,TAN Y Y.Effect of cement slurry wastewater on hydration characteristics of MgO activated slag cementitious materials[J].China Concrete and Cement Products,2024(1):100-103.

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