无砂大孔生态混凝土关键指标评述  

Review of key indicators for large-porous ecological non-fines concrete

作　　者：邢振贤[1] 柴琰琰[1] 张艳鸽[1] 

机构地区：[1]华北水利水电学院土木与交通学院,河南郑州450011

出　　处：《人民长江》2011年第7期74-76,共3页Yangtze River

基　　金：水利部堤防安全与病害防治工程技术研究中心开放课题基金项目"无砂大孔生态混凝土在堤防护岸工程中的应用研究"(200902)

摘　　要：为了研究无砂大孔生态混凝土植生性的影响因素,配制既能提供草木植被生长所需条件,又能满足施工作业要求的混凝土。通过对比普通混凝土与土壤内部结构、成分含量,提出了无砂大孔生态混凝土的植生性控制指标：连通孔隙率大于25%、沉浆面积率小于5%、抗压强度为5~15 MPa。进行了粗骨料级配试验及改变水灰比优化试验,研究结果表明,合理选择水灰比及骨料级配后,无砂大孔生态混凝土的连通孔隙率可以达到25%,沉浆面积率可以控制在5%以下,抗压强度达到9 MPa。使混凝土的绿化与硬化要求有机结合起来。In order to study the factors that affect the characteristics of plant-growing of large-porous ecological non-fines concrete,we prepare a type of concrete that is not only beneficial to plant growing but also meet the strength requirement.We put forward the controlling indicators of plant-growing of ecological concrete by comparing the internal structure and composition of normal concrete and soil： pore connectivity larger than 25%,deposition paste area ratio less than 5%,and compressive strength of 5~15 MPa.We conducted tests of aggregate gradation and water cement ratio optimization;and it is shown that by optimizing the aggregate gradation and water cement ratio,the pore connectivity of large-porous ecological non-fines concrete could reach 25%,deposition paste area ratio could be controlled under 5%,and the compressive strength could reach 9 MPa.The new type of ecological concrete is an organic integration of greening and ground hardening.

关 键 词：生态混凝土 抗压强度 连通孔隙率 沉浆面积 植生性 

分 类 号：TV431[水利工程—水工结构工程]