基于正交试验的粉煤灰-硅锰渣再生混凝土力学性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (9): 3190-3201.

基于正交试验的粉煤灰-硅锰渣再生混凝土力学性能研究

王晨晨¹, 王学志¹, 陈东林¹, 贺晶晶²

1.辽宁工业大学土木建筑工程学院,锦州 121001;
2.中国电建集团西北勘测设计研究院有限公司,西安 710100

收稿日期:2022-04-13 修回日期:2022-07-11 出版日期:2022-09-15 发布日期:2022-09-27
通讯作者: 王学志,博士,教授。E-mail:myemailwxz@163.com
作者简介:王晨晨(1996—),女,硕士研究生。主要从事固废在混凝土中综合利用的研究。E-mail:wangchenchenemail@163.com
基金资助:
辽宁省教育厅基金项目(JJL201915402,LJKY2019113);中国电建集团西北勘测设计研究院工程实验监测院(SYY-KJ-2020-02)

Mechanical Properties of Fly Ash-Silicon Manganese Slag Recycled Concrete Based on Orthogonal Test

WANG Chenchen¹, WANG Xuezhi¹, CHEN Donglin¹, HE Jingjing²

1. School of Civil and Architectural Engineering, Liaoning University of Technology, Jinzhou 121001, China;
2. Power China Northwest Engineering Corporation Limited, Xi'an 710100, China

Received:2022-04-13 Revised:2022-07-11 Online:2022-09-15 Published:2022-09-27

摘要/Abstract

摘要： 为研究固体废弃物取代混凝土原材料的适用性及对混凝土性能的影响,对16组粉煤灰-硅锰渣再生混凝土试块进行正交试验,研究当粉煤灰体积取代胶凝材料、硅锰渣体积取代砂、再生骨料质量取代粗骨料时不同取代量对混凝土坍落度、立方体抗压强度和劈裂抗拉强度的影响。结果表明:当粉煤灰取代量为40%(体积分数)时,混凝土坍落度提高率最大,为14.5%,立方体抗压强度和劈裂抗拉强度均降低,降低率分别为7.2%、22.8%;硅锰渣的取代会降低混凝土坍落度,当硅锰渣取代量为80%(体积分数)时,立方体抗压强度和劈裂抗拉强度的降低率最小,分别为0.5%、11.5%;再生骨料的取代会降低混凝土坍落度,当再生骨料取代量为100%(质量分数)时,立方体抗压强度的降低率为1.9%,劈裂抗拉强度的降低率为12.4%。通过优化模型NSGM(1,4)对混凝土立方体抗压强度进行模型预测,模型模拟平均相对误差为0.542%,模型预测平均相对误差为2.727%。

关键词: 混凝土, 粉煤灰, 硅锰渣, 再生骨料, 正交试验, 坍落度, 强度

Abstract: To study the applicability of solid waste replacement of concrete raw materials and the effect on concrete properties, through the orthogonal test of 16 groups of fly ash-silica manganese slag recycled concrete test blocks, the effects of fly ash volume substitution for cementitious material, silicon manganese slag volume substitution for sand, and recycled aggregate mass substitution for coarse aggregate on concrete slump, cube compressive strength and splitting tensile strength were studied under different substitution amounts. The results show that when the substitution amount of fly ash is 40% (volume fraction), theincreasing rate of concrete slump is the largest, which is 14.5%, and the cube compressive strength and splitting tensile strength are reduced, and the reduction rate are 7.2% and 22.8%, respectively. The substitution of silicon manganese slag reduces the slump of concrete, and when the substitution amount of silicon manganese slag is 80% (volume fraction), the reduction rate of the compressive strength and splitting tensile strength is the smallest, which are 0.5% and 11.5%, respectively. The substitution of recycled aggregate reduces the slump of concrete, and when the substitution amount of recycled aggregate is 100% (mass fraction), the reduction rate of the cube compressive strength is 1.9%, and the reduction rate of splitting tensile strength is 12.4%. The cube compressive strength of concrete is predicted by the optimized model NSGM(1,4). The average relative error of model simulation is 0.542%, and the average relative error of model prediction is 2.727%.

Key words: concrete, fly ash, silicon manganese slag, recycled aggregate, orthogonal test, slump, strength

中图分类号:

TU528

王晨晨, 王学志, 陈东林, 贺晶晶. 基于正交试验的粉煤灰-硅锰渣再生混凝土力学性能研究[J]. 硅酸盐通报, 2022, 41(9): 3190-3201.

WANG Chenchen, WANG Xuezhi, CHEN Donglin, HE Jingjing. Mechanical Properties of Fly Ash-Silicon Manganese Slag Recycled Concrete Based on Orthogonal Test[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(9): 3190-3201.

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