薄层罩面层间黏结材料性能评价

Evaluation on Properties of Bonding Materials between Thin Overlays

随着道路交通事业的发展,对一些表面功能衰减的道路进行养护成为一种趋势。薄层罩面即是一种合理有效的养护方案。为改善薄层罩面层间黏结性能,进一步提高薄层罩面的养护寿命,对四种不同的层间黏结材料进行研究试验。具体包括SBS改性沥青,ESSO70#基质沥青,橡胶沥青,TB改性沥青。试验方法采用自主提出的材料黏结强度简易检测方法,即杠杆拉拔法。通过四种不同黏结材料不同洒布量下的拉拔力,黏结强度,评价其作为层间材料的黏结性能。试验结果表明,4种材料均能满足较为苛刻的黏结强度要求值不小于0.48 MPa。其中黏结性能较好的材料为SBS改性沥青,最佳推荐洒布用量为0.6 kg/m2。

With the development of road transportation industry, it is a trend to maintain some roads with weakened surface function. Thin overlay is a reasonable and effective maintenance scheme. In order to improve the bonding performance between the thin overlays and further improve the maintenance life of thin overlays, four different interlayer bonding materials of SBS modified asphalt, ESSO70# matrix asphalt, rubberized asphalt and TB modified asphalt are studied and tested. The test method is a self-developed simple method for detecting the bond strength of materials, that is, a lever drawing method.The drawing force and bonding strength of four different bonding materials with the different spraying amounts are used to evaluate the bonding performances as interlayer materials. The test results show that the four materials can all meet the more stringently required value of bond strength not less than0.48 MPa, in which SBS modified asphalt is the best bonding material. The best recommended spraying amount is 0.6 kg/m^2.