聚乙烯醇纤维水泥稳定碎石的抗裂性和抗冲刷性能
Crack Resistance and Anti-Erosion Performance of Cement Stabilized Macadam Reinforced with Polyvinyl Alcohol Fiber

DOI: 10.12677/HJCE.2019.88149, PP. 1284-1292

Keywords: 聚乙烯醇纤维，水泥稳定碎石，抗裂性能，抗冲刷性能
Polyvinyl Alcohol Fiber, Cement Stabilized Macadam, Crack Resistance, Anti-Erosion Performance

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Abstract:

为改善高海拔地区水泥稳定碎石的抗裂性和抗冲刷能力，分别研究了水泥用量、聚乙烯醇纤维掺量与龄期对水泥稳定碎石的路用性能的影响规律，确定了适用于高海拔地区水泥稳定碎石的合理水泥用量和聚乙烯醇纤维掺量。结果表明，随着龄期的增长，干缩系数显著下降，且下降幅度主要集中在前7天；较高的聚乙烯醇纤维掺量和较低的水泥用量有利于水泥稳定碎石抗裂性的提升，当纤维掺量在0.9 vt‰、水泥用量为5.0 wt%时水泥稳定碎石不仅具有良好的抗裂性能，而且具有优良的抗冲刷性能。
To improve the crack resistance and anti-erosion performance of cement stabilized macadam in high altitude area, the effects of cement content, PVA fiber content and curing period on mechanical properties and crack resistance were investigated. This paper reasonably quantified cement and PVA fiber content. The results showed that dry shrinkage coefficient significantly decreased with increase of curing period, mainly in the first seven days. The increase of fiber content and decrease of cement content improved the crack resistance of cement stabilized macadam. When the fiber content was 0.9 wt‰ and the cement content was 5.0 vt%, both crack resistance and anti-erosion performance of cement stabilized macadam were excellent.

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