程浩;苑兆迪;孙启润;万海峰;
CHENG Hao;YUAN Zhao-di;SUN Qi-run;WAN Hai-feng;School of Civil Engineering, Yantai University;Shandong Institute of Transportation Science;

• 1:烟台大学土木工程学院
• 2:山东省交通科学研究院

摘要(Abstract)：

为了研究聚乙烯醇(PVA)纤维的掺量对水泥胶砂力学性能的影响，采用硫铝酸盐水泥、粉煤灰、硅灰、聚乙烯醇纤维等材料制备40 mm×40 mm×160 mm胶砂试件，通过流动度试验、抗折试验、抗压试验测试7组试件的力学性能。试验结果表明，随着纤维掺量的增加，胶砂的流动度逐渐降低。抗折、抗压试验中，试件的抗折强度均比不加纤维的有不同程度提高，掺加质量分数0.20%的PVA纤维的试件3、7、28 d的抗折强度均最大；试件的抗压强度和抗折强度的变化规律相同。韧性数值表明，试件在龄期为3 d的测试结果呈上升趋势，龄期为7 d和28 d呈下降趋势。经综合比较，PVA纤维质量分数为0.20%时，试件的力学性能最佳。
In order to study the influence of the content of polyvinyl alcohol fiber(PVA) on the mechanical properties of cement mortar, sulphoaluminate cement, fly ash, silica fume, polyvinyl alcohol fiber and other materials were used to prepare 40 mm×40 mm×160 mm mortar specimens. The properties of seven groups of mortar specimens were tested by fluidity test, flexural test and compressive test. The results show that the fluidity of mortar decreases with the increase of PVA fiber content. In the flexural and compressive test, the flexural strength of the specimens is improved in different degrees than that of the specimens without fiber,and the flexural strength of the specimens with mass fraction 0.20% PVA fiber is the highest at 3,7,28 days.The variation of compressive strength and flexural strength of specimens is the same. Toughness values show that the test results at the age of 3 days show an upward trend, while those at the age of 7 days and28 days show a downward trend. By comprehensive comparison, the mechanical property of the specimens is the best when the PVA fiber mass fraction is 0.20%.

关键词(KeyWords)： 聚乙烯醇纤维;水泥胶砂;抗折强度;抗压强度;韧性
polyvinyl alcohol fiber;cement mortar;flexural strength;compressive strength;toughness

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 程浩;苑兆迪;孙启润;万海峰;
CHENG Hao;YUAN Zhao-di;SUN Qi-run;WAN Hai-feng;School of Civil Engineering, Yantai University;Shandong Institute of Transportation Science;

DOI: 10.16090/j.cnki.hcxw.2023.03.016

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