采用砾石骨料的心墙沥青混凝土水稳定性能试验研究  

Experimental Research on the Gravel Aggregate Water Stability Performance of Asphalt Concrete Core Wall

作　　者：何建新[1] 朱西超 杨海华[1] 王文政[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]中电建路桥集团有限公司,北京100048

出　　处：《中国农村水利水电》2014年第11期109-112,共4页China Rural Water and Hydropower

基　　金：新疆水利水电重点学科基金项目(XJXZ-2003-16);新疆维吾尔自治区产学研联合培养研究生示范基地项目资助(xjaucxy-yjs-20131004);新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2014I016)

摘　　要：为进一步研究采用砾石骨料的心墙沥青混凝土水稳定性能,以砾石骨料为原材料制备沥青混凝土试件,进行了水稳定试验、浸水及真空饱水马歇尔试验和改进的冻融劈裂试验,试验结果表明：水稳试件的水稳定系数为0.99,满足规范大于0.90的要求;浸水及真空饱水试件随着浸泡时间的增加其残留稳定度有所下降,浸水试件及真空饱水试件残留稳定度最大下降率分别为1.4%、3.9%,下降不明显。劈裂抗拉强度比随冻融循环次数的增加有所下降,劈裂抗拉强度比最大下降率为5%;冻融劈裂试件密度随着冻融循环次数的增加略有下降,下降值在0.2%~0.9%之间,但孔隙率仍能满足规范中不大于2%的要求,可以看出心墙沥青混凝土在恶劣试验条件下水稳定性仍然是有保证的。为完善心墙沥青混凝土水稳定性试验方法及砾石骨料的应用提供参考依据。To further study the water stable performance of using gravel aggregate＇s core wall asphalt concrete ,gravel aggregate as raw material preparation of asphalt concrete specimen ,water stability test ,soaking and vacuum saturated marshal test and improved freeze-thaw splitting test were carried out .The results show that water stability specimen stability coefficient is 0 .99 ,and meets the regulatory requirements .immersion and vacuum water saturated specimens with immersion time increasing the residual stability decline ,the immersion specimens and vacuum saturated specimens＇residual stability biggest decline rates are 1 .4% and 3 .9% respec‐tively ,the decline is not obvious .The porosity was still able to meet the specification requirements of within 2% .It can be seen that the core wall asphalt concrete＇s water stability is still guaranteed under harsh conditions .This paper serves as a reference for improving the water stability of asphalt concrete core wall test methods and gravel aggregate applications .

关 键 词：砾石骨料 心墙沥青混凝土 水稳定性 劈裂抗拉强度 

分 类 号：TV431.5[水利工程—水工结构工程]