次轻骨料混凝土预制路面板力学性能研究  

Study on Mechanical Properties of Precast Pavement Slab with Underweight Aggregate

作　　者：孙舒[1] 陈鹏[1] 王月华[1] 叶伟[1] Sun Shu;Chen Peng;Wang Yuehua

机构地区：[1]泰州职业技术学院建筑工程学院,江苏泰州225300

出　　处：《江苏建材》2021年第2期14-16,共3页Jiangsu Building Materials

基　　金：2019泰州职业技术学院院级一般课题(TZYKY-19-10)“预制混凝土板快速修复水泥路面结构设计研究”;2018泰州职业技术学院院级一般课题(TZYKY-19-10)“装配式混凝土结构楼梯平面整体表示方法研究”。

摘　　要：水泥混凝土预制路面板快速修复是目前水泥路面修复技术中耗时短、影响小的实用技术,但是预制路面板尺寸会对构件质量和拼装质量产生影响。采用页岩陶粒部分替换粗骨料,可降低混凝土自重,通过配合比计算得到替换率分别为20%、30%、40%、50%和60%的次轻骨料混凝土的配比,分别检测其3 d、7 d及28 d的抗压强度和抗折强度。研究发现,陶粒的掺入可显著降低混凝土的自重,但也会导致其强度降低。替换率30%的次轻骨料混凝土能够达到较佳的路用性能。The rapid repairment of cement concrete precast pavement slab is the practical technology with the shorter time consumption and the less impact in the current cement pavement repair technology,but the size of precast pavement slab will affect the quality of components and assembly quality.Using the shale ceramsite to replace coarse aggregate to reduce concrete weight.The proportion of sub lightweight aggregate concrete with replacement rate of 20%,30%,40%,50%and 60%was obtained through the calculation of mix proportion.The compressive strength and flexural strength of the concrete at 3d,7d and 28d were tested respectively.It is found that the addition of ceramsite can significantly reduce the weight of concrete,but also lead to the decrease of its strength.The sub lightweight aggregate concrete with 30%replacement rate can achieve better road performance.

关 键 词：次轻骨料混凝土 路面修复 陶粒 力学性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]