Extended Use of Limestone Fines in Various Concretes  

作　　者：Gilson R. Lomboy Fatih Bektas Kejin Wang 

机构地区：[1]Department of Civil, Construction and Environmental Engineering, lowa State University, Ames, IA 50011, USA [2]Institute for Transportation, lowa State University, Ames, 1A 50010, USA

出　　处：《Journal of Civil Engineering and Architecture》2016年第9期995-1005,共11页土木工程与建筑（英文版）

摘　　要：Limestone fines are increasingly used in cement and concrete for improved material properties and sustainability. This paper presents recent research at Iowa State University on utilization of limestone fines in concrete. It includes the beneficial uses of limestone fines in： （1） limestone blended Portland cement; （2） SFSCC （semi-flowable self-consolidating concrete）; and （3） HPC （high performance concrete）. The research results show that using 5%-10% of limestone fines to replace for Type IP cement （with 25% fly ash） increased mortar strength. Well-designed SFSCC with 25% limestone fines （by mass of cementitious materials） displayed desirable rheological and mechanical properties required for slip-forming construction. The newly developed limestone fines-based HPC reached the one-day compressive strength of over 28 MPa.

关 键 词：流态自密实混凝土 石灰石粉 应用 高性能混凝土 波特兰水泥 细粉 材料质量 可持续性 

分 类 号：TU755[建筑科学—建筑技术科学] X773[环境科学与工程—环境工程]