低温作用下钢纤维地聚合物混凝土力学性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (9): 3203-3213.

低温作用下钢纤维地聚合物混凝土力学性能研究

王萧萧^1,2,3, 董培森¹, 杨鑫瑞¹, 张菊^1,3,4, 闫长旺^1,3,4, 董宇飞¹

1.内蒙古工业大学土木工程学院,呼和浩特 010051;
2.内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室,呼和浩特 010051;
3.生态型建筑材料与装配式结构内蒙古自治区工程研究中心,呼和浩特 010051; 4.内蒙古工业大学矿产资源绿色开发重点实验室,呼和浩特 010051

收稿日期:2024-02-20 修订日期:2024-04-29 出版日期:2024-09-15 发布日期:2024-09-19
通信作者: 张菊,博士,教授。E-mail:zj970741@126.com
作者简介:王萧萧(1987—),女,博士,副教授。主要从事固废、建材资源化方面的研究。E-mail:wxiaoxiao.good@163.com
基金资助:
中央引导地方科技发展资金项目(2021ZY0024);内蒙古自然科学基金(2022MS05034);国家级大学生创新创业训练计划项目(202210128007);内蒙古自治区高等学校科学技术研究项目(NJZY23060)

Mechanical Properties of Steel Fiber Geopolymer Concrete under Low Temperature

WANG Xiaoxiao^1,2,3, DONG Peisen¹, YANG Xinrui¹, ZHANG Ju^1,3,4, YAN Changwang^1,3,4, DONG Yufei¹

1. School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;
2. Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region, Inner Mongolia University of Technology, Hohhot 010051, China;
3. Inner Mongolia Engineering Research Center of Ecological Building Materials and Prefabricated Construction, Hohhot 010051, China;
4. Key Laboratory of Green Development of Mineral Resources, Inner Mongolia University of Technology, Hohhot 010051, China

Received:2024-02-20 Revised:2024-04-29 Published:2024-09-15 Online:2024-09-19

摘要/Abstract

摘要： 为研究低温作用下钢纤维地聚合物混凝土(SFGPC)力学性能的变化规律,利用自制低温环境试验装置研究不同温度(-30、-20、-10、0、20 ℃)、不同钢纤维体积掺量(0%、0.5%、1.0%、1.5%)对地聚合物混凝土破坏特征及抗压、抗折强度的响应规律,并借助扫描电子显微镜(SEM)对SFGPC进行微观结构分析,同时应用响应面法(RSM)构建SFGPC力学性能关系模型,提供一种可行的抗压、抗折强度预测方法。结果表明:-30 ℃下,当钢纤维掺量为1.5%时,SFGPC抗压、抗折强度分别为59.8、6.6 MPa,与-30 ℃下钢纤维掺量为0%时相比分别提升75%、65%,与20 ℃下钢纤维掺量为1.5%时相比分别提升41%、144%;随着钢纤维掺量增加,SFGPC内部黏结性与吸附能力增强,力学性能提高;利用RSM得到SFGPC抗压、抗折强度的预测模型,预测值与试验值的相对误差分别小于5.7%、8.0%。

关键词: 钢纤维, 地聚合物混凝土, 低温环境, 力学性能, 微观形貌

Abstract: In order to study the variation of mechanical properties of steel fiber geopolymer concrete (SFGPC) under low temperature, a self-made low temperature environment test device was used to study the failure characteristics and compressive strength and flexural strength of geopolymer concrete at different temperatures (-30, -20, -10, 0, 20 ℃) and different steel fiber volume content (0%, 0.5%, 1.0%, 1.5%). The microstructure of SFGPC was analyzed by scanning electron microscope (SEM). At the same time, the response surface method (RSM) was used to construct the mechanical property relationship model of SFGPC, which provided a feasible prediction method of compressive strength and flexural strength. The results show that when steel fiber content is 1.5%, the compressive strength and flexural strength of SFGPC at -30 ℃ are 59.8 and 6.6 MPa, respectively, which are 75% and 65% higher than those when steel fiber content is 0% at -30 ℃, and 41% and 144% higher than those when steel fiber content is 1.5% at 20 ℃, respectively. With the increase of steel fiber content, the internal adhesion and adsorption capacity of SFGPC enhance, and the mechanical properties are improved. The prediction models of compressive strength and flexural strength of SFGPC are obtained by RSM, and the relative errors between the predicted values and the tested values are less than 5.7% and 8.0%, respectively.

Key words: steel fiber, geopolymer concrete, low temperature environment, mechanical property, micromorphology

中图分类号:

TU528

王萧萧, 董培森, 杨鑫瑞, 张菊, 闫长旺, 董宇飞. 低温作用下钢纤维地聚合物混凝土力学性能研究[J]. 硅酸盐通报, 2024, 43(9): 3203-3213.

WANG Xiaoxiao, DONG Peisen, YANG Xinrui, ZHANG Ju, YAN Changwang, DONG Yufei. Mechanical Properties of Steel Fiber Geopolymer Concrete under Low Temperature[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(9): 3203-3213.

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