基于响应面法的混杂纤维-复合胶凝材料体系优化设计

摘要/Abstract

摘要： 为克服大掺量复合胶凝材料体系力学性能差的缺点,采用响应面法对混杂纤维复合胶凝材料体系进行优化,以钢纤维掺量、聚丙烯纤维掺量和脱硫石膏掺量为变量因素,以胶砂28 d抗折强度和抗压强度为评价指标,建立预测模型,并进行胶砂及混凝土试验验证。结果表明:当钢纤维体积掺量为0.4%、聚丙烯纤维体积掺量为0.116%和脱硫石膏质量掺量为8%时,复合材料的工作性能和力学性能均达到最优,28 d抗折强度和抗压强度预测值分别可达7.0和37.4 MPa;抗折强度和抗压强度的预测值和试验值相对误差仅为2.86%和1.32%,抗折强度和抗压强度试验值的标准差分别为0.148 8和1.345 9,该响应面法预测模型预测精度高,具有准确性和科学性。本研究印证了复合胶凝材料体系的优化效果,为复合材料多目标优化问题提供新的解决思路和试验依据。

关键词: 复合胶凝材料, 钢纤维, 聚丙烯纤维, 混杂纤维, 响应面法, 多目标优化

Abstract: In order to overcome the disadvantage of poor mechanical properties of composite cementitious material system with large dosage, the response surface method was adopted to optimize the hybrid fiber composite cementitious material system, and the prediction model was established by taking the dosage of steel fiber, polypropylene fiber and desulphurization gypsum as the variable factors, and 28 d flexural strength and compressive strength of cement mortar as the evaluation indexes. Besides, the test of cement mortar and concrete was carried out to verify the predictive model. The results show that when the volume dosage of steel fiber is 0.4%, the volume dosage of polypropylene fiber is 0.116% and the mass dosage of desulphurization gypsum is 8%, the working and mechanical properties of composite materials reach the optimum, the predicted values of the 28 d flexural and compressive strength can be up to 7.0 and 37.4 MPa. The relative errors of flexural and compressive strength between the predicted values and the experimental values are only 2.86% and 1.32% and the standard deviation of the test values of flexural strength and compressive strength is 0.148 8 and 1.345 9, proving that the response surface method has high prediction precision, accuracy and scientificity. The optimisation effect of the composite cementitious material system is proved through this study, which provides a new solution idea and test basis for the multi-objective optimisation problem of composite materials.

Key words: composite cementitious material, steel fiber, polypropylene fiber, hybrid fiber, response surface methodology, multi-objective optimization

中图分类号:

TU502

刘子仪, 宋少民. 基于响应面法的混杂纤维-复合胶凝材料体系优化设计[J]. 硅酸盐通报, 2023, 42(12): 4197-4207.

LIU Ziyi, SONG Shaomin. Optimal Design of Hybrid Fiber-Composite Cementitious Material System Based on Response Surface Methodology[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4197-4207.

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