高渗透型温再生剂渗透性量化评价方法研究

Research on Quantitative Evaluation Method for Permeability of High Permeability Temperature Regenerants

针对目前再生剂渗透性评价方法不系统,试验方法不精确且操作复杂等问题,首先采用RTFOT延时老化方法制备老化沥青,然后通过接触角试验所得数据作接触角随时间变化的散点图,并进行拟合,得到评价再生剂渗透效果的关键指标——摊铺速率b。最后通过对已知渗透性的两种再生剂进行渗透性试验,量化评价两种再生剂的渗透效果,以此论证该试验方法的可行性。建议在进行再生剂再生效果验证的同时,需考虑其在RAP老化沥青中的渗透作用。

At present,the permeability evaluation method of regenerator is not systematic,the test method is not accurate and the operation is complicated.Firstly,the aging asphalt was prepared by RTFOT delay aging method.Then,the data obtained from the contact angle test were used to make the scatter plot of the contact angle changing with time,and the key index of evaluating the permeability of regenerator,spreading rate b was obtained.Finally,the permeability test of two regenerants with known permeability was carried out to evaluate the permeability effect quantitatively,and the feasibility of the test method was demonstrated.It is suggested that the permeability of regenerant in RAP aged asphalt should be considered while verifying the regenerant's regeneration eff ect.