基于响应面法的可控低强度材料配合比优化研究

摘要/Abstract

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。

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

Abstract: 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-solidratio, 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.

Key words: recycled fine aggregate, controlled low strength material, response surface analysis, mixture ratio design, multi-index optimization

中图分类号:

TU528

朱祐增, 刘浩, 黄锐, 张鹏. 基于响应面法的可控低强度材料配合比优化研究[J]. 硅酸盐通报, 2021, 40(8): 2670-2679.

ZHU Youzeng, LIU Hao, HUANG Rui, ZHANG Peng. Optimization of Mixture Ratio Research of Controlled Low Strength Materials Based on Response Surface Methodology[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2670-2679.

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