建筑垃圾再生混合砂混凝土力学性能试验研究  

Experimental Research on Mechanical Property of Construction Wastes Recycled Mixed Sand Concrete

作　　者：刘俊华[1] 刘勇[1] 刘凤利[2] 张承志[2] 

机构地区：[1]开封大学土木建筑工程学院,475004 [2]河南大学材料与结构研究所,开封475004

出　　处：《混凝土与水泥制品》2014年第6期94-97,共4页China Concrete and Cement Products

基　　金：河南省教育厅科学技术研究重点项目(13B560136);河南省教育厅科学技术研究重点项目(12B560012)河南省科技厅科技攻关项目(132102310113)

摘　　要：为实现建筑垃圾的再生利用和特细砂的大宗利用,将废混凝土再生粗砂、废砖再生粗砂分别与特细砂掺配,得到建筑垃圾再生混合砂,研究其对混凝土表观密度、和易性、抗压强度和劈裂抗拉强度的影响。试验结果表明,建筑垃圾再生混合砂替代天然砂配制混凝土,可达到设计和易性和强度要求,并有利于降低容重;废砖再生混合砂混凝土的韧性优于普通混凝土,而废混凝土再生混合砂混凝土的韧性劣于普通混凝土。In order to achieve the recycling of construction wastes and comprehensive utilization of super-fine sand, the construction wastes mixed sand is made by super-fine sand partly replaced by recycled concrete coarse sand or recy-cled brick coarse sand. The influences of construction wastes mixed sand on the apparent density, workability, compressive strength and tensile splitting strength of concrete are studied. Based on comparison tests, conclusions can be drawn that concrete using construction wastes mixed sand instead of natural sand can meet the standard of the workability and strength design while decreasing concrete unit weight. The toughness of recycled brick mixed sand concrete is better than that of common concrete. However, the toughness of recycled concrete mixed sand concrete is just on the contrary.

关 键 词：废混凝土再生粗砂 废砖再生粗砂 特细砂 再生混凝土 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]