差异改性沥青路面层间抗剪强度影响研究

为了提高沥青路面的使用性能,本文主要对沥青路面层间抗剪强度的影响因素进行研究,主要分为温度、湿度、道路线型对沥青路面的层间抗剪强度的影响规律,通过数值模拟、试验研究得到:环境温度为30℃~60℃作用下的沥青路面层间抗剪强度,层间抗剪强度随着环境温度的升高而呈现减小的趋势,在40℃、60℃的转折点下速率变化较快,横向剪应力随着路面坡度从0°~5°逐渐增大,在3%时发生转折。分析了四种粘层材料作用下的层间抗剪强度,并进行优劣排序:SBS改性沥青、液体沥青、乳化沥青以及90号基质沥青。并且对应相应的影响,从差异改性沥青角度给出了解决措施。

in order to improve the per formance of asphalt pavement,this paper mainly studies the inf luencing factors of the interlaminar shear strength of asphalt pavement,mainly including the inf luence law of temperature,humidity a nd road line type on the interlaminar s hear s trength of a sphalt pavement.T hrough numerical s imulation and experimental research,it can be concluded that the interlaminar shear strength and interlaminar shear strength of asphalt pavement under the action of environmental temperature of 30-60℃The degree decreases with the increase of ambient temperature,and the rate changes rapidly at the turning point of 40℃and 60℃.The transverse shear stress increases g radually with the road slope from 0-5°a nd turns at 3%.This paper a nalyzes the interlaminar shear strength under the action of four kinds of bonding materials,and sorts the advantages and disadvantages:SBS modif ied asphalt,liquid asphalt,emulsif ied asphalt and 90 matrix asphalt.And corresponding to the corresponding impact,from the point of view of different modif ied asphalt,the solutions are given.