聚乙烯醇纤维水泥稳定碎石的疲劳性能研究

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (10): 3493-3500.

聚乙烯醇纤维水泥稳定碎石的疲劳性能研究

熊延华¹, 屈会朋², 阳应荣¹, 汪晓洪²

1.贵州省公路建设养护集团有限公司,贵阳 550000;
2.苏交科集团股份有限公司,南京 211112

收稿日期:2022-07-10 修回日期:2022-08-23 出版日期:2022-10-15 发布日期:2022-10-26
作者简介:熊延华(1965—),男,高级工程师。主要从事公路桥梁工程施工技术及材料应用等方面的研究。E-mail:tgzy2022@tom.com
基金资助:
贵州省公路局科技项目(2021QLM14)

Fatigue Properties of Polyvinyl Alcohol Fiber Cement Stabilized Crushed Stone

XIONG Yanhua¹, QU Huipeng², YANG Yingrong¹, WANG Xiaohong²

1. Guizhou Highway Construction and Maintenance Group Co. Ltd., Guiyang, 550000, China;
2. JSTI GROUP, Nanjing, 211112, China

Received:2022-07-10 Revised:2022-08-23 Online:2022-10-15 Published:2022-10-26

摘要/Abstract

摘要： 为研究掺聚乙烯醇纤维水泥稳定碎石的疲劳性能,首先根据聚乙烯醇纤维对水泥稳定碎石力学性能的影响规律,确定纤维最佳掺量和长度。基于间接拉伸疲劳试验和Weibull分布,对其疲劳寿命测试结果进行分析并建立疲劳方程。结果表明,聚乙烯醇纤维最佳掺量和长度为0.06%(质量分数)和24 mm;在最佳掺量和长度下,与未掺加纤维的水泥稳定碎石材料相比,聚乙烯醇纤维水泥稳定碎石的无侧限抗压强度提高约24%,劈裂强度提高约26%;对比不掺纤维的水稳碎石材料,其疲劳寿命也呈显著优势,当水泥用量为4%(质量分数)时,掺聚乙烯醇纤维与不掺纤维水泥稳定碎石斜率b之比为0.94~0.99,截距a之比为1.06~1.23。

关键词: 水泥稳定碎石, 聚乙烯醇纤维, 纤维掺量, 抗压强度, 疲劳性能

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

中图分类号:

U414

熊延华, 屈会朋, 阳应荣, 汪晓洪. 聚乙烯醇纤维水泥稳定碎石的疲劳性能研究[J]. 硅酸盐通报, 2022, 41(10): 3493-3500.

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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