PE/PP混杂纤维应变硬化碱激发复合材料力学性能研究  

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

作　　者：王彦朝 吕景辉 王英倡 郭永昌[2] WANG Yanzhao;LYU Jinghui;WANG Yingchang;GUO Yongchang(Guangzhou Yuetong Highway Operation and Management Co.,Ltd.Wuhan Branch,Wuhan 430070,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[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

出　　处：《硅酸盐通报》2024年第8期2879-2887,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(12272099)。

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。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.

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 

分 类 号：TU528[建筑科学—建筑技术科学]