氧化镁膨胀剂对半柔性路面材料性能的影响  

Influence of MgO Expansion Agent on Properties of Semi-flexible Pavement Materials

作　　者：吴博 WU Bo(Xinjiang Luqiao Construction Group Beijiang Company,Urumqi 830000,China)

机构地区：[1]新疆路桥建设集团北疆公司,乌鲁木齐市830000

出　　处：《北方交通》2020年第7期63-66,共4页Northern Communications

摘　　要：针对水泥灌浆半柔性路面结构内部易收缩变形、开裂等问题,通过水泥灌浆料添加氧化镁膨胀剂对半柔性路面沥青混合料的相关性能进行试验,研究结果表明:随着氧化镁膨胀剂增加,水泥灌浆料的初始流动度、30min流动度先增加后降低,3d、7d、28d龄期抗压强度都逐渐降低,半柔性路面沥青混合料的动稳定度先增加后降低、低温抗裂性逐渐增加;当氧化镁膨胀剂掺量为4%时,半柔性路面沥青混合料试件的干缩性明显降低。In view of the problems of shrinkage,deformation and cracking in the cement grouting semi-flexible pavement structure,the test on the related performance of semi-flexible pavement asphalt mixture is carried out by adding MgO expansion agent into the cement grouting material.The research results show that:with the increase of MgO expansion agent,the initial fluidity and 30min fluidity of cement grouting material increase first and then decrease,the compressive strength at the age of 3d,7d and 28d decreases gradually;the dynamic stability of the semi-flexible pavement asphalt mixture increases first and then decreases,and the low temperature crack resistance increases gradually;when the content of MgO expansion agent is 4%,the dry shrinkage of the semi-flexible pavement asphalt mixture specimen decreases obviously.

关 键 词：半柔性路面 氧化镁膨胀剂 动稳定度 干缩性 

分 类 号：U416.221[交通运输工程—道路与铁道工程]