基于响应面法的可控低强度材料配合比优化研究  

Optimization of Mixture Ratio Research of Controlled Low Strength Materials Based on Response Surface Methodology

作　　者：朱祐增 刘浩[1] 黄锐 张鹏[1] ZHU Youzeng;LIU Hao;HUANG Rui;ZHANG Peng(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430074

出　　处：《硅酸盐通报》2021年第8期2670-2679,共10页Bulletin of the Chinese Ceramic Society

基　　金：湖北省自然科学基金面上项目(2020CFB477)。

摘　　要：针对混凝土再生细骨料利用率不高的问题,可将再生细骨料用于制备可控低强度材料(CLSM),并利用响应面分析(RSM)为CLSM配合比设计提供一种新的方法。以水固比、聚羧酸减水剂掺量、水泥占胶凝材料比例(灰胶比)为试验因素,以流动度和泌水率的比值(流泌比)和28 d抗压强度为响应值,进行多指标优化。单因素试验表明,水固比和聚羧酸减水剂掺量提高会导致CLSM流动性和泌水率上升,而随着灰胶比提高CLSM流动度和泌水率呈逐渐减小的趋势。双响应面分析结果表明,水固比和灰胶比、减水剂掺量和灰胶比对流泌比交互作用显著,而各参数之间对28 d抗压强度的交互作用一般。最后,通过对两个响应值同时优化得到CLSM的最优配合比,经验证与实际基本一致,实现了对CLSM工作性能和抗压强度的多指标优化。To solve the problem of low utilization rate of the recycled fine aggregate in concrete,the recycled fine aggregate was used to prepare controlled low strength materials(CLSM),and a new method for CLSM mixture ratio design was provided by response surface methodology(RSM).In this study,the water-solid ratio,the content of polycarboxylic acid superplasticizer,the ratio of cement to the total cementitious material(pc/cm)were used as experimental factors,and the ratio of fluidity to bleeding rate and 28 d compressive strength were used as response values to conduct multi-index optimization.According to the single factor experiment,the increase of water-solid ratio and polycarboxylic acid superplasticizer content leads to the increase of CLSM fluidity and bleeding rate.With the increase of pc/cm ratio,the fluidity and the bleeding rate of CLSM gradually decrease.The results of dual response surface analysis show that the interaction of water-solid ratio and pc/cm ratio,polycarboxylic acid superplasticizer content and pc/cm ratio is significant on the ratio of fluidity to bleeding rate,while the interaction of the parameters on the 28 d compressive strength is not significant.Finally,by simultaneously optimizing the two response values,the optimal mixture ratio of CLSM is obtained,which is basically consistent with the actual results,and the multi-index optimization of CLSM working performance and compressive strength is realized.

关 键 词：再生细骨料 可控低强度材料 响应面分析 配合比设计 多指标优化 

分 类 号：TU528[建筑科学—建筑技术科学]