基于响应曲面法的快凝高强胶凝体系配比优化研究  

Mixture Ratio Optimization of Fast-Setting and High-Strength Cementitious System Based on Response Surface Methodology

作　　者：刘凤利[1] 冯冠翔 杨飞华 马保国[3] 战佳宇 李沙 LIU Fengli;FENG Guanxiang;YANG Feihua;MA Baoguo;ZHAN Jiayu;LI Sha(Laboratory for Recycled and Functional Building Materials,Henan University,Henan Kaifeng 475004,China;State Key Laboratory of Solid Waste Reuse for Building Materials,Beijing 100041,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]河南大学循环与功能建材实验室,河南开封475004 [2]固废资源化利用与节能建材国家重点实验室,北京100041 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《河南大学学报（自然科学版）》2022年第4期449-456,共8页Journal of Henan University:Natural Science

基　　金：固废资源化利用与节能建材国家重点实验室开放基金资助项目(SWR-2020-007);河南省科技攻关项目(212102310565)

摘　　要：快凝高强胶凝材料是现代建筑预制装配化,模块化和抢修抢建工程中应用的重要材料.以普通硅酸盐水泥为实验对象,以硫铝酸盐水泥、硅灰和粉煤灰为改性剂,以三者对普通硅酸盐水泥的取代率为响应因素,对普通硅酸盐水泥—硫铝酸盐水泥—硅灰—粉煤灰四元体系进行响应曲面优化.以四元体系28 d抗压强度为响应值,建立四元体系抗压强度预测模型.基于预测模型,确定复合胶凝材料体系的最优配比,并研究复合胶凝材料28 d抗压强度在各响应因素交互作用下的变化规律.在此基础上,对所得预测优配比进行凝结时间与抗压强度实验验证,并进行SEM微观分析.结果表明,硫铝酸盐水泥、硅灰和粉煤灰的取代率分别为12.84%、9.28%和12.11%时,预测配比28 d抗压强度最大,硫铝酸盐水泥、硅灰、粉煤灰之间存在明显的交互作用;与空白样相比,工作性满足要求时,优配比初终凝时间分别缩短了84.32%和82.20%;1 d和28 d抗压强度分别提高了47.07%和29.71%.研究结果可为快凝、早强和高强复合胶凝体系研究提供参考.With the gradual industrialization of the construction industry,prefabricated buildings and high-rise buildings have great potential for future development.Therefore,the construction industry has put forward higher requirements for the performance of cement-based materials.Ordinary portland cement can no longer meet the needs of cement-based materials for fast-setting and high-strength of cementitious material systems in the future.Using sulphoaluminate cement(SAC),silica fume(SF)and fly ash(FA)as modifiers,and taking the substitution rate of the three to ordinary portland cement(OPC)as the response factor,the response surface methodology(RSM)was used to design the four-element system of OPC-SAC-SF-FA to improve the compressive strength of OPC and adjust its setting time.The 28 days compressive strength of the quaternary system was used as the response value to establish the compressive strength prediction model and determine the optimal ratio of the composite cementitious material system.The effects of various factors and their interaction on the 28 d compressive strength of composite cementitious materials were analyzed.The predicted results were verified by experiments of condensation time and compressive strength,and the micromorphology of the samples was observed by SEM.The results show that there is obvious interaction between raw materials and the compressive strength of composite cementitious material system at 28 d,which reaches the maximum when the substitution rates of SAC,SF and FA are 12.84%,9.28%and 12.11%,respectively.Compared with the control group,initial and final setting time of the optimal matching group was reduced by 84.32%and 82.20%,while the workability met the requirements.The compressive strength at 1 day and 28 days increased by 47.07%and 29.71%,respectively.It provides reference for the research of fast-curing hardening,early-strength and high-strength composite cementitious system.

关 键 词：普通硅酸盐水泥 响应曲面法 抗压强度 凝结时间 预测模型 

分 类 号：TU528[建筑科学—建筑技术科学]