混合再生沥青混合料路基土工程特性研究
Research on Engineering Properties of Subgrade Soil Using Mixtures of Reclaimed Asphalt Pavement
舒明旺1
作者信息
- 1. 上饶市赣东公路工程咨询有限公司,江西 上饶 334600
- 折叠
摘要
为研究混合再生沥青混合料路基土工程特性,制备不同再生沥青混合料掺量(质量比 0%,15%,30%,50%,75%)和含水率(5.5%,6.1%,6.9%,7.5%)混合路基土试件,在不同侧限应力、偏应力和体应力水平下测试了试件回弹模量变化规律.研究结果表明,混合路基土回弹模量随着侧限应力、偏应力和体应力的增加而增大,混合路基土对侧限应力的敏感性较低;混合路基土含水率越接近最佳含水率,其回弹模量越大;随着再生沥青混合料掺量的增加,混合路基土回弹模量近似线性增大;可向路基土中掺入再生沥青混合料,以有效提高路基土承载力.
Abstract
In order to investigate the engineering properties of subgrade soils using mixtures of reclaimed asphalt pavement,test specimens were fabricated with varying reclaimed asphalt pavement contents and moisture contents,reclaimed asphalt pavement contents is 0%,15%,30%,50%and 75%respectively,the moisture contents is 5.5%,6.1%,6.9%and 7.5%respectively.The variations in resilient modulus of these mixed subgrade soil specimens were examined under differing levels of lateral confinement stress,deviator stress,and total stress.The research results show that the resilient modulus of the mixed subgrade soil increases as lateral confinement stress,deviator stress and total stress escalate,with a relatively low sensitivity to lateral confinement stress observed.Moreover,the closer the moisture content of the mixed subgrade soil is to the optimal moisture level,the higher its resilient modulus becomes.Additionally,there is an approximately linear increase in the resilient modulus of the mixed subgrade soil as the reclaimed asphalt pavement content rises.Consequently,incorporating reclaimed asphalt pavement into subgrade soils can effectively enhance their load-bearing capacity.
关键词
道路/沥青/路基土/含水率/回弹模量/应力Key words
highway/asphalt/subgrade soil/moisture content/resilient modulus/stress引用本文复制引用
出版年
2024
NETL
NSTL
万方数据