Attenuation Law of Tensile Property of PVA-ECC after Freezing-Thawing Cycles

Abstract

Abstract: In order to study the tensile property of polyvinyl alcohol fiber-reinforced engineered cementitious composite (PVA-ECC) after freezing-thawing cycles, the tensile tests were carried out on PVA-ECC specimens with 0, 25, 50, 75, 100, 125, 150 freezing-thawing cycles. The tensile property of PVA-ECC after different freezing-thawing cycles was comprehensively evaluated by surface characteristic and tensile characteristic parameter. In addition, the vector autoregressive moving average (VARMA) model was used to explore the law of tensile characteristic parameter after freezing-thawing cycles. The results show that after freezing-thawing cycles, the specimens are all damaged to varying degrees, and the damage degree gradually increases with the increase of freezing-thawing cycles. The initial crack strength and tensile strength become smaller with the increase of freezing-thawing cycles, and the tensile strain and strain energy increase first and then decrease with the increase of freezing-thawing cycles. Based on the experimental data, some formulas relating to tensile characteristic parameter are proposed, which further reveal the attenuation law of tensile characteristic parameter after freezing-thawing cycles.

Key words: polyvinyl alcohol fiber-reinforced engineered cementitious composite, initial crack strength, tensile strength, tensile strain, strain energy, freezing-thawing cycle, attenuation law, VARMA model

CLC Number:

TU525.9

GAO Xiumei, LIU Shuguang, YAN Min. Attenuation Law of Tensile Property of PVA-ECC after Freezing-Thawing Cycles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(3): 837-844.

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