土工材料及其加铺位置对沥青混合料抗裂性能影响研究

Study on Influence of Geotextile and Its Laying Position to Anti-Cracking Performance of Asphalt Mixture

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。

By comparing bending test, cracking test, uniaxial compression test, and fatigue test on samplebeams of fiber glass geo - grid, paving polyester filament singeing Geotextile and geo - grid with nopaving, this paper studies influence to performance of asphalt mixture by different geotextile material andits laying position. Analysis on test results shows that laying fiber glass geo - grid has obvious influence torupture 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 onrupture strain or stiffness modulus was not so obvious.