基于熵权法和灰色理论的钢渣粗骨料混凝土耐久性评估及寿命预测

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (10): 3710-3721.

基于熵权法和灰色理论的钢渣粗骨料混凝土耐久性评估及寿命预测

兰素恋^1,2, 田威³, 张红日^2,4, 高晋峰³, 韩祖丽⁵, 李红明^2,4

1.广西交通职业技术学院,南宁 530007;
2.广西道路与结构重点实验室,南宁 530007;
3.长安大学建筑工程学院,西安 710061;
4.广西交科集团有限公司,南宁 530007;
5.广西理工职业技术学院,崇左 532200

收稿日期:2023-05-24 修订日期:2023-07-01 出版日期:2023-10-15 发布日期:2023-10-17
通信作者: 张红日,博士,正高级工程师。E-mail:1051583104@qq.com
作者简介:兰素恋(1987—),女,高级工程师。主要从事地质、路基教学等方面的研究。E-mail:lansulian2022@163.com
基金资助:
2020年度第三批广西交通运输行业重点科技项目清单-科技成果推广项目;广西道路与结构重点实验室开放基金(2021gxjgclkf004);2022年度广西交通运输行业重点科技项目清单-创新研发项目

Durability Evaluation and Life Prediction of Steel Slag Coarse Aggregate Concrete Based on Entropy Weight Method and Grey Theory

LAN Sulian^1,2, TIAN Wei³, ZHANG Hongri^2,4, GAO Jinfeng³, HAN Zuli⁵, LI Hongming^2,4

1. Guangxi Transport Vocational and Technical College, Nanning 530007, China;
2. Guangxi Key Laboratory of Road and Structure, Nanning 530007, China;
3. School of Civil Engineering, Chang’an University, Xi’an 710061, China;
4. Guangxi Transportation Science and Technology Group Co., Ltd., Nanning 530007, China;
5. Guangxi Vocational Institute of Technology, Chongzuo 532200, China

Received:2023-05-24 Revised:2023-07-01 Online:2023-10-15 Published:2023-10-17

摘要/Abstract

摘要： 为探究钢渣粗骨料对混凝土抗硫酸盐侵蚀性能的影响,对不同钢渣粗骨料替代率(0%、30%、60%、90%,质量分数)混凝土在不同浓度(5%、10%、15%,质量分数)硫酸钠(Na₂SO₄)溶液中进行了侵蚀试验。基于熵权法建立了以混凝土质量、抗压强度和相对动弹性模量三个典型耐久性指标为参数的钢渣粗骨料混凝土耐久性综合评价指标D。通过D值反映钢渣粗骨料替代率和Na₂SO₄溶液浓度对混凝土耐久性的影响,并通过灰色理论的GM(1,1)模型对不同侵蚀条件下钢渣粗骨料混凝土的使用寿命进行预测。结果表明,整个侵蚀过程中,钢渣替代率低于60%的钢渣粗骨料混凝土的D值均高于普通混凝土,钢渣替代天然骨料配制混凝土可以提高混凝土抗硫酸盐侵蚀性能。GM(1,1)模型预测结果与试验结果基本一致,60%钢渣粗骨料替代率下混凝土的使用寿命均优于其他组。

关键词: 钢渣粗骨料混凝土, 硫酸盐侵蚀, 熵权法, 灰色理论, 寿命预测

Abstract: In order to explore the effect of steel slag coarse aggregate on sulfate resistance of concrete, erosion tests of concrete in different concentrations (5%, 10%, 15%,mass fraction) of sodium sulfate (Na₂SO₄) solution were carried out under different substitution rates of steel slag coarse aggregate (0%, 30%, 60%, 90%). Based on the entropy weight method, the comprehensive durability evaluation index D of steel slag coarse aggregate concrete was established with three typical durability indexes of concrete mass, compressive strength and relative dynamic elastic modulus as parameters. The influence of substitution rate of steel slag coarse aggregate and the concentration of Na₂SO₄ solution on durability of concrete were reflected by D value, and the service life of steel slag coarse aggregate concrete under different erosion conditions was predicted by GM(1,1) model of grey theory. The results show that in the whole erosion process, the D value of steel slag coarse aggregate concrete with steel slag substitution rate less than 60% is higher than that of ordinary concrete, indicating that concrete prepared with steel slag instead of natural aggregate can improve the sulfate resistance of concrete. The prediction results of GM(1,1) model are basically consistent with the experimental results, and the service life of concrete with 60% steel slag coarse aggregate substitution rate is better than that of other groups.

Key words: steel slag coarse aggregate concrete, sulfate attack, entropy weight method, grey theory, life prediction

中图分类号:

TU528

兰素恋, 田威, 张红日, 高晋峰, 韩祖丽, 李红明. 基于熵权法和灰色理论的钢渣粗骨料混凝土耐久性评估及寿命预测[J]. 硅酸盐通报, 2023, 42(10): 3710-3721.

LAN Sulian, TIAN Wei, ZHANG Hongri, GAO Jinfeng, HAN Zuli, LI Hongming. Durability Evaluation and Life Prediction of Steel Slag Coarse Aggregate Concrete Based on Entropy Weight Method and Grey Theory[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(10): 3710-3721.

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