多源固废制备掺合料的活性评价及水泥水化产物微观性能  

Activity Evaluation of Multi-Source Solid Waste Preparation Admixtures and Microscopic Properties of Cement Hydration Products

作　　者：司马笑情 谢祥兵 李广慧 刘晨晨 张艺林 司斌 季旸 邵景干 SIMA Xiaoqing;XIE Xiangbing;LI Guanghui;LIU Chenchen;ZHANG Yilin;SI Bin;JI Yang;SHAO Jinggan(School of Materials,School of Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Civil Engineering and Environment,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Hydraulic Engineering,Henan Vocational College of Water Conservancy and Environment,Zhengzhou 450008,China;China Construction First Engineering Group Second Construction Co.,Ltd.,Beijing 100068,China;Henan Jiaotong Institute Engineering Technology Group Co.,Ltd.,Zhengzhou 450046,China)

机构地区：[1]郑州航空工业管理学院材料学院,郑州450046 [2]郑州航空工业管理学院土木环境学院,郑州450046 [3]河南水利与环境职业学院水利工程学院,郑州450008 [4]中建一局集团第二建筑有限公司,北京100068 [5]河南交院工程技术集团有限公司,郑州450046

出　　处：《硅酸盐通报》2025年第3期1069-1079,共11页Bulletin of the Chinese Ceramic Society

基　　金：河南省自然科学基金面上项目(242300421257);郑州航空工业管理学院青年科研基金支持计划专项资助(23ZHQN01007);河南省交通运输科技计划项目(2016-2-3,2021T7,2021J5);郑州航空工业管理学院研究生教育创新计划基金(2024CX137,2024CX115);河南省科学技术厅项目(232102240027)。

摘　　要：工业废渣中的粒化高炉矿渣粉(BFS)和粉煤灰(FA)因典型的火山灰活性已成为制备硅酸盐水泥的主要掺合料,而建筑固废中的再生砖粉(RBP)和再生混凝土粉(RCP)与BFS和FA混合制备活性掺合料是拓展多源固废资源利用的重要途径。本文以RBP、RCP、FA、BFS为原料,采用湿法球磨制备掺合料,以掺合料掺量为变量进行胶砂的抗压强度试验,采用火山灰比强度法对掺合料的活性进行评价,并通过XRD、TG-DTG、SEM及EDS对水化产物进行分析。结果表明:四种固废粉制备的掺合料可以有效替代部分水泥,含掺合料的水泥胶砂90 d抗压强度最高可达74.2 MPa;RCP与RBP因具有火山灰反应活性,反应后水化产物氢氧化钙(CH)相的衍射峰强度下降、水化硅酸钙凝胶(C-S-H)衍射峰加宽;RCP和RBP中的Ca^(2+)、Si^(2+)可促进FA和BFS中硅铝物质活化作用,利用活性硅铝矿物协同作用制备的活性掺合料BCFFS1的各组分最佳配合比(质量分数)为15%RBP、15%RCP、15%FA、5%BFS。活性掺合料的应用不仅有助于提高多种固废材料的利用效率,还有助于降低建筑行业对普通水泥依赖。Granulated blast furnace slag(BFS)powder and fly ash(FA)in industrial waste have become the main admixtures for preparing Portland cement due to their typical pozzolanic properties.Whether recycled brick powder(RBP)and recycled concrete powder(RCP)in construction solid waste can be mixed with BFS and FA to prepare active admixtures is an important way to expand the utilization of multi-source solid waste resources.In this study,RBP,RCP,FA and BFS were used as raw materials to prepare admixtures by wet ball milling.The compressive strength test of binder was carried out with the content of the admixture as the variable,and activity of admixture was evaluated by the pozzolanic specific strength method.The hydration products were analyzed by XRD,TG-DTG,SEM and EDS.The results show that the admixtures prepared from four types of solid waste powders can effectively replace a portion of cement.The compressive strength of cement mortar containing admixtures can reach up to 74.2 MPa at 90 d.Due to the pozzolanic reactivity of RCP and RBP,the diffraction peak intensity of the hydration product CH phase decreases and the C-S-H peak widens after the reaction.Ca^(2+)and Si^(2+)in RCP and RBP promote the activation of siliceous and aluminum minerals in FA and BFS.The optimal mass fractions of each component in the active admixture prepared by the synergistic effect of active silicon and aluminum minerals are 15%RBP,15%RCP,15%FA,and 5%BFS.The application of active admixtures not only helps improve the utilization efficiency of various solid waste materials,but also helps reduce the dependence of the construction industry on ordinary cement.

关 键 词：多源固废 掺合料 火山灰活性 硅铝物质 水化产物 湿法球磨 

分 类 号：U414[交通运输工程—道路与铁道工程] TQ172[化学工程—水泥工业]