纳米材料改性沥青混合料路用性能对比研究

Comparison study on road performance of nano-material modified asphalt mixture

为了给纳米改性沥青路面推荐较优纳米材料,通过室内试验对比研究了TiO_(2)、ZnO和SiO_(2)纳米材料在不同添加剂量条件下,对基质沥青混合料的性能作用效果。结果表明:添加TiO_(2)纳米材料,在添加剂量为6%时,动稳定度达到最大值1 652次/mm,抗弯拉强度达到最大值14.01 MPa;在添加剂量为7%时,冻融劈裂强度比(TSR)达到最大值87.5%。添加ZnO纳米材料,在添加剂量为7%时,动稳定度达到最大值1 794次/mm, TSR达到最大值89.1%,抗弯拉强度达到最大值13.04 MPa。添加SiO_(2)纳米材料,在添加剂量为6%时,动稳定度达到最大值1 493次/mm, TSR达到最大值92.7%;在添加剂量为7%时,抗弯拉强度达到最大值11.45 MPa。

In order to recommend optimal nano-materials for nano-modified asphalt pavement,the effects of TiO_(2),ZnO and SiO_(2) nano-materials on the performance of matrix asphalt mixture under different additive dosage were studied through laboratory tests.The results showed that the dynamic stability of the matrix asphalt mixture with TiO_(2) nanomaterials reached a maximum of 1652 times/mm and the flexural strength reached a maximum of 14.01 MPa when the additive dosage was 6%.When the additive dosage was 7%,the TSR reached a maximum of 87.5%.When the additive dosage of matrix asphalt mixture added with ZnO nanomaterials was 7%,the dynamic stability reached a maximum of 1794 times/mm,the TSR reached a maximum of 89.1%,and the flexural tensile strength reacheds a maximum of 13.04 MPa.The dynamic stability of the matrix asphalt mixture with SiO_(2) nanomaterials reached a maximum of 1493 times/mm and the TSR reaches a maximum of 92.7%when the additive dosage was 6%.When the additive dosage was 7%,the flexural strength reached a maximum of 11.45 MPa.