山皮水锈石对沥青混合料性能的影响研究

Study on the Influence of Hill Rust Stone on The Performance of Asphalt Mixture

试验研究表明,山皮水锈石集料与石油沥青的黏附性差,与纯石灰岩集料相比,毛体积相对密度比小,吸水率大,对沥青混合料体积性能和沥青路面现场压实度评价具有一定的影响;在相同油石比和矿料级配下,分别在粗集料中掺加山皮水锈石含量为0%、5%、10%、20%、30%进行AC-25C沥青混合料性能评价。试验研究表明,粗集料中的山皮水锈石降低了沥青混合料的黏结力,掺量超过10%时对沥青混合料的体积性能、水稳定性能、高温稳定性影响较大。

The experimental studies have shown that the adhesion between the hillside rust stone aggregate and the petroleum asphalt is poor.Compared with the pure limestone aggregate,the gross volume relative density ratio is small,and the water absorption is large,which has a certain impact on the volume performance of the asphalt mixture and the on-site compaction evaluation of the asphalt pavement;Under the same asphalt aggregate ratio and mineral aggregate gradation,the performance evaluation of AC-25C asphalt mixture is carried out by adding 0%,5%,10%,20%and 30%of hillside water rust stone into the coarse aggregate respectively.The experimental studies have shown that the rust stone with mountain cover in the coarse aggregate reduces the adhesion of the asphalt mixture,and the volume performance,water stability and high temperature stability of the asphalt mixture are greatly affected when the content exceeds 10%.