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通过对11组聚乙烯醇纤维水泥基复合材料(PVA-ECC)试件的抗压强度、抗折强度及单面盐冻试验,探究粉煤灰掺量和纤维掺量对PVA纤维水泥基复合材料力学性能及抗冻性能的影响。结果表明:抗压强度与抗折强度均随粉煤灰掺量的增加而降低;纤维掺量对抗折强度影响较大,而对抗压强度影响很小。单面盐冻试验中,试件单位面积质量损失与相对动弹性模量损失率均随冻融循环次数增加而增长,粉煤灰掺量为45%~50%、纤维掺量为1.75%时,抗冻性能达到最佳。
Through the compressive strength, flexural strength and single-sided salt frost test of 11 groups of polyvinyl alcohol fiber cement-based composites (PVA-ECC) specimens to explore the effect of fly ash content and fiber content on the PVA fiber cement- Material mechanical properties and frost resistance. The results show that the compressive strength and flexural strength all decrease with the increase of fly ash content. The fiber content has a great influence on the flexural strength and has little effect on the compressive strength. In the single-side salt frost experiment, the mass loss per unit area and the loss rate of relative dynamic elastic modulus both increased with the increase of freeze-thaw cycles. The content of fly ash was 45% -50% and the fiber content was 1.75% , Frost resistance to achieve the best.