石粉对水泥湿堆积密度和混凝土性能的影响  

Effects of Stone Powder on Wet Packing Density of Cement and Performances of Concrete

作　　者：王雨利[1] 周明凯[2] 李北星[2] 管学茂[1] 杨雷[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]武汉理工大学硅酸盐工程中心教育部重点实验室,武汉430070

出　　处：《重庆建筑大学学报》2008年第6期151-154,共4页Journal of Chongqing Jianzhu University

基　　金：博士基金(B2008-48-648259);西部交通建设科技项目(200331881106)

摘　　要：石灰岩机制砂的用量越来越大,相应地,它的副产物石灰岩石粉也越来越多。如果不能合理地将石粉加以利用,势必给环境造成很大的负担。以石粉做矿物掺合料取代水泥为研究目的,对比了在0%、10%、15%、20%时的比例等质量取代水泥,对混凝土工作性能、抗压强度和抗渗性能的影响,得出石粉取代水泥的比例为10%左右时,对混凝土的性能有较好的改善作用。通过测其石粉和水泥混合后的湿堆积密度,得出石粉的质量比为10%时,二者的密实度最大。表明石粉做掺合料时,可通过二者混合后密实度的变化来判断二者的最佳比例。The amount of limestone powder, which is a by-product of manufactured fine aggregate, is larger and larger with the increase of manufactured fine aggregate. Environment will be severely polluted if the powder is improperly used. The effects of limestone powder on workability, compressive strength, and impermeability of concrete were studied when cement is substituted for the mass proportion of 0, 10, 15, 20 percent with it. The results show that the performances of concrete are better improved when the percentage of limestone powder is about 10 percent. The wet packing density of mixture of limestone powder and cement was measured, and it shows that thedegree of density was biggest when limestone powder is 10 percent. This shows that the best mixing proportion of limestone powder and cement may be determined through measuring the change of compactness of mixture of limestone powder and cement.

关 键 词：石灰岩石粉 掺合料 混凝土 湿堆积密度 

分 类 号：TU528.041[建筑科学—建筑技术科学]