掺碎石陶粒多孔混凝土基本性能试验研究  

Experimental study on the performance of porous ceramsite concrete with different gravel ratio

作　　者：刘聃[1] 刘荣桂[1] 胡白香[1] 徐荣进[1] 殷杰[1] 温惠清 

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013 [2]江苏金土木建设集团有限公司,江苏常熟215500

出　　处：《混凝土》2015年第6期144-148,共5页Concrete

基　　金：国家自然科学基金项目(51278230);住房和城乡建设部2014年科学技术项目(2014-K4-003)

摘　　要：以黏土陶粒、碎石、水泥、Zs-1外加剂等为主要原料,制备了一种高性能陶粒多孔混凝土,通过试验分析了骨料粒径、碎石掺量对陶粒多孔混凝土孔隙率、透水系数、强度等性能的影响,并对其破坏形态、破坏机理进行了分析。结果表明：纯陶粒骨料多孔混凝土的孔隙率为23%-27%,透水系数为6.3-7.1,强度为1-3 MPa在不显著降低孔隙性能的前提下,掺入碎石能有效提高其强度至15 MPa以上;多孔混凝土的强度和孔隙率随骨料粒径的增大而小幅提高,且碎石掺量越大提高效果愈明显。与纯陶粒混凝土相比,碎石掺量为40%-60%、骨料粒径为20-25 mm时,多孔混凝土的强度提高了7倍,而孔隙率仅仅降低了4.2%,此时混凝土基本性能相对最优。High-performance ceramsite porous concrete was prepared with the clay ceramsite gravel cement,Zs- 1 admixture.The influence of aggregate size gravel ratio on ceramsite porous concrete performances such as porosity the permeability coefficient and compressive strength were investigated,and the failure modes and mechanism of ceramsite porous concrete were additionally analyzed.The results show that porosity the permeability coefficient and compressive strength of the pure ceramsite porous concrete are 23%-27%,6.3-7.1,1-3 MPa,respectively.The strength of the ceramsite porous concrete can be effectively increased up to 15 MPa by the graveldoped with no significant reduce in the pore properties.The compressive strength and porosity of porous concrete was mildly improved as the aggregate size was increased,the bigger gravel ratio the more obvious improvement was observed.In comparison with pure ceramsite porous concrete,seven fold increase in the compressive strength of porous concrete was achieved when the gravel ratio was 40%-60%,and the aggregate size was 20-25 mm,while the porosity was only decreased by 4.2%,the performance of the porous concrete was regarded to be optimized.

关 键 词：陶粒多孔混凝土 抗压强度 孔隙率 透水系数 

分 类 号：TU528.041[建筑科学—建筑技术科学]