土工材料及其加铺位置对沥青混合料抗裂性能影响研究

摘要

By comparing bending test, cracking test, uniaxial compression test, and fatigue test on sample beams of fiber glass geo - grid, paving polyester filament singeing Geotextile and geo - grid with no paving, this paper studies influence to performance of asphalt mixture by different geotextile material and its laying position. Analysis on test results shows that laying fiber glass geo-grid has obvious influence to rupture strain of asphalt mixture which has greatly improved the stiffness modulus as well as the anti -fatigue performance. As temperature reduces, test samples paved with fiber glass geo-grid has better anti-tensile strength comparing with test sample paved with geo-textile cloths. However, the influence on rupture strain or stiffness modulus was not so obvious.%通过比较玻璃纤维土工格栅、加铺聚酯长丝烧毛土工布以及不加铺土工格栅的试样小梁弯曲试验、劈裂试验、单轴压缩试验、疲劳试验，研究不同种类土工材料及其铺设位置对沥青混合料性能的影响。试验分析表明：铺设玻璃纤维格栅对沥青混合料破坏应变影响显著，对其劲度模量有较大改善，且其疲劳性能也得到明显改善；随着温度降低，加铺玻璃纤维格栅后试件抗拉强度提高幅度明显高于加铺土工布的，但对其破坏应变、劲度模量的影响不是很显著。