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电解锰渣粉对混凝土孔结构及力学性能的影响
电解锰渣粉对混凝土孔结构及力学性能的影响
  • 吴 锐1,王超林1,*,夏 晔2,张 坤1
2024年第5期
摘要
引用本文
摘   要:研究了电解锰渣粉等质量取代0、10%、20%、30%、40%、50%的水泥对混凝土孔结构和力学性能的影响。结果表明:不同电解锰渣粉掺量试件中大孔、中孔、小孔的连通性均较差,且小孔数量较多;随着电解锰渣粉掺量的增加,试件中的孔隙数量增多,孔隙率增大,抗压强度降低,弹性模量基本呈降低趋势;与基准组相比,掺电解锰渣粉试件的应力-应变曲线的压密阶段和峰后失稳破坏阶段明显变长,说明延性有所提高。 Abstract: The effects of replacing 0, 10%, 20%, 30%, 40%, and 50% of cement with electrolytic manganese slag powder on the pore structure and mechanical properties of concrete were studied. The results show that the connectivity of macropores, mesopores, and micropores in specimens with different contents of electrolytic manganese slag powder is poor, and there are more micropores. With the increase of the content of electrolytic manganese slag powder, the number of pores in the specimen increases, the porosity increases, the compressive strength decreases, and the elastic modulus basically shows a decreasing trend. Compared with the benchmark group, the compression stage and post peak instability failure stage of the stress-strain curve of the specimen mixed with electrolytic manganese slag powder are significantly longer, indicating an improvement in ductility.
吴锐,王超林,夏晔,等.电解锰渣粉对混凝土孔结构及力学性能的影响[J].混凝土与水泥制品,2024(5):94-97. WU Rui, WANG Chaolin, XIA Ye,et al.Effect of electrolytic manganese slag powder on pore structure and mechanical properties of concrete[J].China Concrete and Cement Products,2024(5):94-97.
废玻璃粉在水泥基材料中的研究和应用进展
废玻璃粉在水泥基材料中的研究和应用进展
  • 王春福,王瑜玲
2024年第5期
摘要
引用本文
摘   要:基于“双碳”背景,总结了废玻璃粉的物理化学性质及其活性激发方式(机械粉磨、化学活化、高温激发、纳米改性),综述了废玻璃粉对水泥基材料工作性、水化反应、力学性能和耐久性能的影响,并对废玻璃粉的未来研究和应用方向进行了展望,可为提高废玻璃的资源化利用率和助力水泥行业的碳减排提供参考。 Abstract: Based on the background of "Double-Carbon", the physical and chemical properties, and several commonly used activation methods(mechanical grinding, chemical activation, high-temperature excitation, nano modification) of waste glass powder are summarized. The effects of waste glass powder on the workability, hydration reaction, mechanical properties, and durability of cement-based materials are summarized, and the future research and application directions of waste glass powder are discussed, which can provide reference for improving the resource utilization rate of waste glass and assisting the carbon reduction of the cement industry.
王春福,王瑜玲.废玻璃粉在水泥基材料中的研究和应用进展[J].混凝土与水泥制品,2024(5):98-103. WANG C F,WANG Y L.Research and application progress of waste glass powder in cement- based materials[J].China Concrete and Cement Products,2024(5):98-103.
煤矸石掺量对混凝土性能的影响研究
煤矸石掺量对混凝土性能的影响研究
  • 付鹏辉
2024年第5期
摘要
引用本文
摘   要:研究了煤矸石分别等体积替代粗骨料、细骨料(0、5%、10%、15%、20%、25%)对混凝土工作性、干表观密度和力学性能的影响。结果表明:掺入煤矸石粗骨料或细骨料总体上会导致混凝土的工作性、干表观密度和力学性能下降;综合考虑,推荐煤矸石粗骨料或细骨料的掺量均为5%。 Abstract: The effects of gangue replacing coarse and fine aggregates (0, 5%, 10%, 15%, 20%, 25%) in equal volume on the workability, dry apparent density and mechanical properties of concrete were studied. The results show that the addition of gangue coarse or fine aggregates generally leads to a decrease in workability, dry apparent density and mechanical properties of concrete. The recommended content of gangue coarse aggregate or fine aggregate is 5%.
付鹏辉.煤矸石掺量对混凝土性能的影响研究[J].混凝土与水泥制品,2024(5):104-108. FU P H.Research on the effect of gangue content on concrete properties[J].China Concrete and Cement Products,2024(5):104-108.
GS土体硬化剂对车站基坑加固土抗渗 性能的影响
GS土体硬化剂对车站基坑加固土抗渗 性能的影响
  • 王社江1,袁志刚2,薛永健1,李德猛2,王 飞1
2024年第5期
摘要
引用本文
摘   要:基于苏州某地铁车站基坑工程,研究了GS土体硬化剂对不同养护龄期下的粉质黏土和粉砂夹粉土抗渗性能的影响,并进行了现场试验验证。结果表明:掺入GS土体硬化剂能有效提高粉质黏土和粉砂夹粉土的抗渗性能,且随着GS土体硬化剂掺量和养护龄期的增加,提高效果更好;GS土体硬化剂在现场试桩试验中的应用效果较好,可为其在相关工程中的进一步推广应用提供参考。 Abstract: Based on the foundation pit project of a subway station in Suzhou, the influence of GS soil hardening agent on the impermeability performance of silty clay and silty sand mixed with silty soil at different curing ages was studied, and on-site tests were conducted to verify the results. The results show that the addition of GS soil hardening agent can effectively improve the impermeability of silty clay and silty sand mixed with silty soil, and the improvement effect is better with the increase of GS soil hardening agent content and curing age. The application effect of GS soil hardening agent in on-site pile testing is good, which can provide reference for its further promotion and application in related engineering.
王社江,袁志刚,薛永健,等.GS土体硬化剂对车站基坑加固土抗渗性能的影响[J].混凝土与水泥制品,109-111 WANG S J,YUAN Z G,XUE Y Jet al.Effect of GS soil hardening agent on impermeability performance of soil for station foundation pit[J].China Concrete and Cement Products,2024(5):109-111.
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