再生混凝土剪切性能试验研究  

Experimental study on shear strength of recycled aggregate concrete

作　　者：黄莹[1] 邓志恒[1] 罗延明 杨海峰[1] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]南京天菱能源技术有限公司,江苏南京210018

出　　处：《混凝土》2010年第2期14-17,31,共5页Concrete

基　　金：国家自然科学基金项目(50868001);广西研究生教育创新计划(2008105930814D012)

摘　　要：为研究再生混凝土的抗剪强度,对再生混凝土的结构性能有更深入的认识,通过对四点受力等高变宽梁进行剪切试验,探讨水灰比相同的条件下,再生骨料取代率对再生混凝土剪切性能的影响。研究表明:再生混凝土剪切破坏形态和普通混凝土相似,但其抗剪强度和变形能力均低于普通混凝土。在对再生混凝土抗剪强度、剪切变形和剪切模量分析的基础上,绘制了再生混凝土的剪应力-应变曲线,建议了剪应力-应变曲线方程和剪切模量的计算公式。In order to study shear capacity of recycled aggregate concrete（RAC）and have deeper understand of stucture performance of RAC, the influence of replacement of recycled aggregate on shear strength of RAC with the same W/C is discussed though the shear test of four-point-stress beam with the same height and different width.The result is shown that failure mode of the sheared RAC girders is similar to that of common concrete,but shear strength and deformability of the girders are lower than those of common concrete.On the basis of analysis of shear strength,shear deformation and shear modulus of RAC,The shear stress-strain curves of RAC are drawn,and the expressions for stress-strain curve and the shear modulus of RAC are suggested.

关 键 词：再生混凝土 再生骨料取代率 受剪破坏 

分 类 号：TU528.01[建筑科学—建筑技术科学]