玄武岩纤维对磷石膏基复合材料耐久性能的影响  

Effect of Basalt Fiber on Durability of Phosphogypsum-Based Composites

作　　者：黄莹蓥 孔德文 崔庚寅 谢浪 王玲玲 HUANG Yingying;KONG Dewen;CUI Gengyin;XIE Lang;WANG Lingling(College of Civil Engineering,Guizhou University,Guiyang 550025,China;Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety,Guiyang 550025,China)

机构地区：[1]贵州大学土木工程学院,贵阳550025 [2]贵州省岩土力学与工程安全重点实验室,贵阳550025

出　　处：《硅酸盐通报》2023年第7期2521-2531,共11页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(52168027,51968009,12162009);贵州省科技计划项目([2020]1Y244)。

摘　　要：通过在磷石膏基复合材料(PGC)中掺入不同直径、长度和掺量的玄武岩纤维(BF),探究BF对PGC耐久性能的影响。结果表明,BF的掺入能显著降低PGC的溶蚀率。随着BF掺量的增加,试样干湿循环和冻融循环强度整体提高,且与绝干强度变化机制类似,其中干湿循环的抗压和抗折强度较空白组分别提高了约22.3%和100.3%,冻融循环的抗压和抗折强度则分别提高了近46.5%和124.0%。同时,PGC的干湿循环与冻融循环强度系数整体随着BF掺量的增多而增大,干湿循环抗压和抗折强度系数分别上升至0.95和0.92,冻融循环抗压和抗折强度系数分别增长至0.71和0.62,这表明PGC耐久性能得到显著改善。此外,BF直径对PGC耐久性能的影响并不显著。本研究结果可以为纤维改性石膏基复合材料的耐久性能研究提供一定的参考。Basalt fiber(BF)was blended into phosphogypsum-based composites(PGC),and the effects of BF diameter,length and content on the durability of PGC were investigated.The results show that the BF addition can significantly reduce the corrosion ratio of PGC.With the increase of BF content,the strength of samples in wet-dry cycle and freeze-thaw cycle increases generally,and the change mechanism is basically consistent with that of the absolute dry strength.The compressive strength and flexural strength in wet-dry cycle increase by 22.3%and 100.3%compared with blank group,respectively.The compressive strength and flexural strength in freeze-thaw cycle increase by 46.5%and 124.0%,respectively.At the same time,the dry-wet cycle and freeze-thaw cycle strength coefficients of PGC increase with the increase of BF content.The dry-wet cycle compressive strength and flexural strength coefficients increase to 0.95 and 0.92,and the freeze-thaw cycle compressive strength and flexural strength coefficients increase to 0.71 and 0.62,respectively,indicating that the durability of PGC has been significantly improved.In addition,the diameter of BF has no significant effect on the durability of PGC.The results provide a reference for the study of durability of fiber modified gypsum-based composites.

关 键 词：玄武岩纤维 磷石膏基复合材料 耐久性能 溶蚀率 干湿循环强度 冻融循环强度 

分 类 号：TQ177[化学工程—硅酸盐工业]