玄武岩纤维粉煤灰增强陶粒混凝土力学性能试验研究

Experimental study on mechanical properties of basalt fiber fly ash reinforced ceramsite concrete

为研究玄武岩纤维(BF)、陶粒(C)和粉煤灰(FA)对玄武岩陶粒粉煤灰混凝土(BCFC)力学性能的影响,应用正交试验法开展9组BCFC抗压强度、劈裂抗拉强度和抗折强度试验并进行极差和方差分析。结果表明:当玄武岩纤维体积率为0.3%,陶粒代石子率为8%,粉煤灰代水泥率为5%时,BCFC强度综合表现最佳;玄武岩纤维掺入混凝土中能显著提高BCFC的强度,三因素对BCFC抗折强度的增强效应最大,玄武岩纤维、陶粒和粉煤灰对BCFC抗折强度的最大提升幅度分别为34.9%、5.08%和1.94%;玄武岩纤维体积率是影响BCFC强度的特别显著性因素。对玄武岩纤维增韧BCFC机理进行分析,最后建立BCFC强度回归方程且精确度较高。

In order to study the influence of basalt fiber(BF),ceramsite(C)and fly ash(FA)on the mechanical properties of basalt ceramsite fly ash concrete(BCFC),nine groups of BCFC compression tests were carried out using the orthogonal test method.Strength,split tensile strength and flexural strength were tested and analyzed by range and variance.The results show that When the volume ratio of basalt fiber is 0.3%,the replacement ratio of ceramsite for stone is 8%,and the replacement ratio of fly ash for cement is 5%,the comprehensive performance of bcfc is the best;the incorporation of basalt fiber into concrete can significantly increase the strength of BCFC,and the three factors have the greatest enhancement effect on BCFC flexural strength.Basalt fiber,ceramsite and fly ash can increase the BCFC flexural strength by 34.9%,5.08%and 1.94%.The volume fraction of basalt fiber is a significant factor affecting the strength of BCFC.The mechanism of basalt fiber toughening BCFC was analyzed,and finally the BCFC strength regression equation was established with high accuracy.