摘要
为实现隧道花岗岩弃渣的资源化利用,解决花岗岩与沥青黏附性较差的问题,通过黏附性等级试验、浸水马歇尔试验和冻融劈裂试验等试验,得到了花岗岩碎石胶粉复合改性沥青混凝土配合比的最佳组成、优选出了最适宜的抗剥落剂种类和掺量。通过浸水马歇尔试验检验了残留稳定度、冻融劈裂试验强度比、动稳定度和低温弯曲性能等路用性能,并与玄武岩碎石胶粉复合改性沥青混凝土的路用性能进行了对比,进行了疲劳试验。结果表明:各项路用性能满足高速公路沥青混凝土表面层的技术要求;花岗岩碎石胶粉复合改性沥青混凝土的疲劳寿命略低于玄武岩胶粉复合改性沥青混凝土,但对应变水平的敏感程度较低。
The achieve the resource utilization of tunnel granite slag and solve the issue of poor adhesion between granite and asphalt,by adhesion grade test,immersion Marshall test and freeze-thaw splitting test,the optimal mix proportion of granite gravel rubber powder composite modified asphalt concrete is obtained,and the most suitable type and dosage of anti-stripping agent are optimized.The residual stability,freeze-thaw splitting test strength ratio,dynamic stability and low-temperature bending performance are tested through the immersion Marshall test,and the result is compared with the road performance of basalt gravel rubber powder composite modified asphalt concrete.The fatigue test is conducted.The result shows that(1)all the road performance meets the technical requirements of expressway asphalt concrete surface layer;(2)the fatigue life of granite gravel rubber powder composite modified asphalt concrete is slightly lower than that of basalt rubber powder composite modified asphalt concrete,but its sensitivity to strain level is relatively low.
作者
马耀举
张甘成
马进学
郭德宁
罗凯元
MA Yao-ju;ZHANG Gan-cheng;MA Jin-xue;GUO De-ning;LUO Kai-yuan(CCCC Investment Co.,Ltd.,Beijing 100020,China;Zhejiang CICO Expressway Construction Management Co.,Ltd.,Hangzhou Zhejiang 310051,China;Beijing Xinqiao Technology Development Co.,ltd.,Beijing 100088,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2022年第S02期41-48,共8页
Journal of Highway and Transportation Research and Development
基金
河北省遵秦高速科技示范工程项目(RP2021003700)
关键词
道路工程
隧道弃渣
水浸法
花岗岩碎石
胶粉复合改性沥青混凝土
抗剥落剂
水稳定性
路用性能
road engineering
discarded tunnel slag
water immersion method
granite gravel
rubber powder composite modified asphalt concrete
anti-stripping agent
water stability
road performance
