PE/PP混杂纤维应变硬化碱激发复合材料力学性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (8): 2879-2887.

PE/PP混杂纤维应变硬化碱激发复合材料力学性能研究

王彦朝¹, 吕景辉², 王英倡², 郭永昌²

1.广州越通公路运营管理有限公司武汉分公司,武汉 430070;
2.广东工业大学土木与交通工程学院,广州 510006

收稿日期:2024-03-07 修订日期:2024-05-01 出版日期:2024-08-15 发布日期:2024-08-12
通信作者: 郭永昌,博士,教授。E-mail:guoyc@gdut.edu.cn
作者简介:王彦朝(1981—),男。主要从事绿色高性能混凝土材料的研究。E-mail:2997673801@qq.com
基金资助:
国家自然科学基金(12272099)

Mechanical Properties of Strain-Hardening Alkali-Activated Composites with Hybrid PE/PP Fibers

WANG Yanzhao¹, LYU Jinghui², WANG Yingchang², GUO Yongchang²

1. Guangzhou Yuetong Highway Operation and Management Co., Ltd. Wuhan Branch, Wuhan 430070, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

Received:2024-03-07 Revised:2024-05-01 Online:2024-08-15 Published:2024-08-12

摘要/Abstract

摘要： 应变硬化碱激发复合材料(SHAAC)兼具低碳环保和高韧性的优点,但高昂的成本限制了其工程应用。为降低成本,研究采用PP纤维替代PE纤维,开发了一种混杂PE/PP纤维SHAAC,并通过轴压与轴拉试验及成本分析,探讨了不同PP纤维替代率(0%、25%、50%、75%和100%,体积分数)对混杂PE/PP纤维SHAAC的轴压、轴拉性能和成本的影响。结果表明:采用PP纤维替代PE纤维时,SHAAC的轴压、轴拉强度及裂缝控制能力随着纤维替代率的增加而降低,但在PP纤维替代率低于75%时,SHAAC仍可呈现伪应变硬化和多缝开裂现象;当PP纤维替代率为50%时,SHAAC极限拉伸应变最高(8.40%),且能保持较高的轴压和轴拉性能,同时成本可降低29.00%,且综合性能与成本比值最高。

关键词: 应变硬化碱激发复合材料, 混杂纤维, PP纤维, PE纤维, 轴拉性能, 轴压性能, 成本分析

Abstract: Strain-hardening alkali-activated composites (SHAAC) is featured by both low carbon footprint and high toughness, but the high cost has limited the engineering applications. To reduce costs, this study explored the substitution of PE fibers with PP fibers to develop a hybrid PE/PP fibers SHAAC. Through axial compression and tension tests, along with cost analysis, the study investigated the influences of different replacement ratios of PP fibers (0%, 25%, 50%, 75% and 100%, volume fraction) on the axial compressive, axial tensile performance, and cost of the hybrid PE/PP fiber SHAAC. The results indicat that the axial compressive and tensile strength of SHAAC decrease when PE fibers are replaced with PP fibers, along with its crack control ability. However, SHAAC can still exhibit pseudo-strain hardening and multiple-cracking phenomenon when the PP fiber replacement ratio is below 75%. When the PP fiber replacement ratio is 50%, SHAAC shows the highest ultimate tensile strain (8.40%) while maintaining high axial compression and tension strength. Moreover, costs can be reduced by 29.00%, and the ratio of tensile parameters to cost is maximized.

Key words: strain-hardening alkali-activated composites, hybrid fiber, PP fiber, PE fiber, axial tensile property, axial compressive property, cost analysis

中图分类号:

TU528

王彦朝, 吕景辉, 王英倡, 郭永昌. PE/PP混杂纤维应变硬化碱激发复合材料力学性能研究[J]. 硅酸盐通报, 2024, 43(8): 2879-2887.

WANG Yanzhao, LYU Jinghui, WANG Yingchang, GUO Yongchang. Mechanical Properties of Strain-Hardening Alkali-Activated Composites with Hybrid PE/PP Fibers[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(8): 2879-2887.

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