Fatigue Properties of Polyvinyl Alcohol Fiber Cement Stabilized Crushed Stone

Abstract

Abstract: In order to study the fatigue performance of cement stabilized crushed stone mixed with polyvinyl alcohol (PVA) fiber, firstly, according to the influence law of polyvinyl alcohol fiber on the mechanical properties of cement stabilized crushed stone, the optimal fiber content and length were determined. Based on the indirect tensile fatigue test and Weibull distribution, the fatigue life test results were analyzed and the fatigue equation was established. The results show that the optimum content and length of PVA fiber are 0.06% (mass fraction) and 24 mm. Under the optimum content and length, the unconfined compressive strength of PVA fiber cement stabilized crushed stone increases by about 24%, and the cracking strength increases by about 26%, compared with the cement stabilized crushed stone material without fiber addition, basides its fatigue life also presents a significant advantage. When the cement mass dosage is 4%, the ratio of slope b of polyvinyl alcohol fiber-doped and non-fiber-doped cement stabilized crushed stone is 0.94~0.99, and the ratio of intercept a is 1.06~1.23.

Key words: cement stabilized crushed stone, polyvinyl alcohol fiber, fiber content, compressive strength, fatigue performance

CLC Number:

U414

XIONG Yanhua, QU Huipeng, YANG Yingrong, WANG Xiaohong. Fatigue Properties of Polyvinyl Alcohol Fiber Cement Stabilized Crushed Stone[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(10): 3493-3500.

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