石灰石粉在高性能混凝土中的应用研究  

Study on application of limestone powder in high performance concrete

作　　者：相军[1] 

机构地区：[1]淮阴工学院建筑工程学院

出　　处：《混凝土》2017年第1期150-152,共3页Concrete

摘　　要：在高性能混凝土制备研究中,采用掺石灰石粉法,对高强混凝土坍落度、扩展度、抗压情况,渗水高度,干缩等进行了分析,结果表明,石灰石粉具有一定的减水效果,混凝土的坍落度随着石灰石粉掺量的增加而增加,但增加的幅度较小,扩展度则呈逐渐下降的趋势。石灰石粉的掺入会引起抗压强度有所下降,当石灰石粉掺量质量分数为18%时,混凝土5、30、65 d的抗压强度出现最大值;在石灰石粉掺量为15%时,混凝土的渗水高度最小,在石灰石粉掺量为9%时,混凝土的渗水高度最大,其中最大值是最小值的1.63倍。石灰石粉的掺入在一定程度上改善了混凝土的抗渗性能。随着石灰石粉掺量的增加,相同龄期的混凝土砂浆干缩值逐渐减小,掺入石灰石粉可以减小水泥砂浆的干缩。High performance concrete were study in the preparation, the blending method of limestone powder, of high strength concrete slump, expand degree, compression and seepage height, dry shrinkage are analyzed, results show that, the lime stone powder with a water reducing effect, tends to increase with ground limestone content, concrete slump degree slightly increasing trend, expansion show a trend of gradual decline.Limestone powder mixed membership caused by compressive strength decreased,when the mass fraction of limestone powder content is 18%, the compressive strength of concrete 5d and 30d, 65d appeared the maximum value.In the limestone powder con- tent was 15%, concrete seepage minimum height, in the limestone powder content is 9%, concrete seepage maximum height, the maximum is 1.63 times of the minimum.The incorporation of limestone powder has a protective effect on the impermeability of concrete.In the same age, with increasing content of limestone powder, concrete, mortar, dry shrinkage value decreases, mixed with lime stone powder can re- duce the dry shrinkage of cement mortar.

关 键 词：石灰石粉 高性能混凝土 应用 

分 类 号：TU528.041[建筑科学—建筑技术科学]