固废基胶凝材料水化特性及其掺量对C30混凝土力学性能影响研究  

Study on hydration characteristics of solid waste based cementitious materials and effect of its content on mechanical properties of C30 concrete

作　　者：张广田 张艳佳 贺光炜 ZHANG Guangtian;ZHANG Yanjia;HE Guangwei(Hebei Provincial Institute of Building Science and Technology Co.,Ltd.,Shijiazhuang 050021,China;Hebei Province Science and Technology Key Laboratory of Solid Waste for Building Materials,Shijiazhuang 050021,China)

机构地区：[1]河北省建筑科学研究院有限公司,石家庄050021 [2]河北省固废建材化利用科学与技术重点实验室,石家庄050021

出　　处：《建筑结构》2024年第23期133-137,26,共6页Building Structure

基　　金：河北省科技重大专项项目重大科技成果转化专项资助(21283801Z);石家庄市科技计划项目(226160507A);中央引导地方科技发展资金项目(自由探索类基础研究)(246Z3806G)。

摘　　要：通过粒度分析、力学性能测试及XRD、SEM、热分析手段,考察了固废基胶凝材料基本物理性能及水化特性,在此基础上考察了固废基胶凝材料掺量对C30混凝土力学性能的影响。结果表明:固废基胶凝材料粒度比水泥细,水化产物主要为AFt和C-S-H凝胶。固废基胶凝材料用量360~400kg/m^(3)时,C30混凝土28d抗压强度36.9~40.4MPa。固废基胶凝材料与水泥双掺且水泥用量为80kg/m^(3)时,C30混凝土28d抗压强度43.7MPa。固废基胶凝材料与水泥、粉煤灰三掺时,C30混凝土具有较好的28d抗压强度保证率。固废基胶凝材料与粉煤灰双掺时,C30混凝土整体强度较差。Through particle size analysis,mechanical performance testing,XRD,SEM,and thermal analysis methods,the basic physical properties and hydration characteristics of solid waste based cementitious materials were investigated.On this basis,the influence of the content of solid waste based cementitious material on the mechanical properties of C30 concrete was investigated.The results show that particle size of solid waste based cementitious material is thinner than cement,and the hydration products are mainly AFt and C-S-H gel.When the amount of solid waste based cementitious material is 360~400kg/m^(3),the compressive strength of C30 concrete at 28d is 36.9~40.4MPa.The 28d compressive strength of C30 concrete is 43.7MPa,when the solid waste based cementitious material and cement are mixed and the cement content is 80kg/m^(3).When the solid waste based cementitious material is mixed with cement and fly ash,C30 concrete has a good 28d compressive strength guarantee rate.When the solid waste based cementitious material and fly ash are mixed together,the overall strength of C30 concrete is poor.

关 键 词：固废基胶凝材料 水化特性 混凝土 力学性能 固废资源化 

分 类 号：TU528[建筑科学—建筑技术科学]