期刊论文

中文

长沙理工大学学报(自然科学版)

1672-9331

2018

15

4

1-8+51

10.3969/j.issn.1672-9331.2018.04.001

国家自然科学基金资助项目(51878077).

本校为第一机构

委内瑞拉岩沥青(Venezuela Rock Asphalt,简称VRA)中沥青含量高达95％以上,是一种沥青含量高、灰分杂质少且易于加工的硬质天然沥青.为了分析其用于沥青改性剂的适用性,选取表面层常用AC-13C型沥青混合料,在0％～1％范围内按0.25％间隔选取5种不同VRA掺量,对其改性沥青混合料进行了配合比设计和路用性能检验.首先,以普通沥青混合料配合比设计结果为基准,根据VRA中纯沥青和矿物质分别等量替代普通沥青混合料中基质沥青和矿粉的原则,提出了VRA改性沥青混合料配合比设计调整的计算公式;同时,通过干法和湿法两种拌和工艺对比,确定了适宜于VRA改性沥青混合料拌制的温度范围与干法工艺.然后,分别进行了...

The asphalt content is up to95%or more in Venezuela Rock Asphalt(VRA),which is a kind of hard natural asphalt with high in asphalt content,less in ash and impurities and easy to process.In order to analyze the applicability of VRA for being used to asphalt modifier,and through selecting the AC-13C type of asphalt mixture commonly used in the surface layer and five different mixing amounts of VRA mass ratio of VRA to its modified asphalt mixture from0%to1%in accordance with the0.25%intervals,the mix design and pavement performance verification for VRA modified asphalt mixture are carried out.Fi...