聚酯-玻璃混杂纤维水泥稳定碎石无侧限抗压强度试验研究

为了研究水泥稳定碎石材料在聚酯-玻璃混杂纤维作用下的7天无侧限抗压强度的变化规律，通过对不同掺量的混杂纤维进行组合，得到了在聚酯-玻璃混杂纤维作用下的最佳掺量。试验结果表明:当聚酯纤维掺量为0.5 ‰~0.7 ‰，玻璃纤维掺量为1.3 ‰~1.7 ‰时，水泥稳定碎石材料7天无侧限抗压强度呈快速增长趋势。其中，在聚酯纤维掺量为0.7 ‰、玻璃纤维掺量为1.3 ‰时达到峰值，其7天无侧限抗压强度为5.20 MPa，相比不掺纤维的水泥稳定碎石的7天无侧限抗压强度增长了30%。聚酯-玻璃混合纤维的最佳掺量配比为聚酯纤维掺量0.7 ‰、玻璃纤维掺量1.3 ‰。

Test Study on Unconfined Compression Strength of Polyester-glass Hybrid Fiber Cement Stabilized Macadam

In order to study the change rule of the 7 d unconfined compression strength of cement stabilized macadam changes under the action of polyester-glass hybrid fiber, the hybrid fiber with different mixture ratio was composed so as to find out optimum percentage. The test result shows that, when the content of polyester fiber is 0.5 ‰~0.7 ‰ and the content of glass fiber is 1.3 ‰~1.7 ‰, the 7 d unconfined compression strength of cement stabilized macadam presents a rapid growth trend and peaks at 0.7 ‰ polyester fiber and 1.3 ‰ glass fiber; at this time, the 7 d unconfined compression strength is 5.2 MPa and, compared to that without fiber, it is improved by 30%. As a result, it is concluded that the optimum mixture ratio of polyester-glass hybrid fiber is that the content of polyester fiber is 0.7 ‰ and the content of glass fiber is 1.3 ‰.