Mechanical and Frost-resistance Properties of Rural Area Building Waste Hollow Bricks  

作　　者：刘军 

机构地区：[1]School of Material Science and Engineering,Shenyang Jianzhu University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2010年第6期1017-1021,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Key Technology R&D Program of China for the 11th Five-Year Plan(2006BAJ04A04);the 100 Million Human Resources Foundation of Liaoning Province (2008921034);the Human Resource Development in Shenyang Special Foundation (2008140403011)

摘　　要：Serving as recycled coarse aggregate,the pretreated rural building waste was added into the concrete hollow bricks in the varying replacement of 0,20%,40%,60%,80% and 100%.By testing its compressive strength,flexural strength,mass and strength loss after freeze-thaw cycles,the impact of the different replacement on mechanical and frost-resistance properties of concrete hollow bricks was presented through SEM analysis.The experimental results show that,with the increase in recycled coarse aggregate replacement rate,the mechanical and frost-resistance properties show a downward trend;when the replacement rate is 40%,28 d compressive strength and flexural strength of concrete hollow brick demonstrate the good peak value which meet the requirement of the national standard for ordinary small concrete hollow bricks;the interfacial structures of the pretreated recycled concrete is more complicated than those of concrete made of natural aggregate,but the former enjoys better interface bonding and tight structure.Serving as recycled coarse aggregate,the pretreated rural building waste was added into the concrete hollow bricks in the varying replacement of 0,20%,40%,60%,80% and 100%.By testing its compressive strength,flexural strength,mass and strength loss after freeze-thaw cycles,the impact of the different replacement on mechanical and frost-resistance properties of concrete hollow bricks was presented through SEM analysis.The experimental results show that,with the increase in recycled coarse aggregate replacement rate,the mechanical and frost-resistance properties show a downward trend;when the replacement rate is 40%,28 d compressive strength and flexural strength of concrete hollow brick demonstrate the good peak value which meet the requirement of the national standard for ordinary small concrete hollow bricks;the interfacial structures of the pretreated recycled concrete is more complicated than those of concrete made of natural aggregate,but the former enjoys better interface bonding and tight structure.

关 键 词：replacement rate waste clay brick mechanical properties frost-resistance properties MICROSTRUCTURE 

分 类 号：TU522.1[建筑科学—建筑技术科学]