绿色高性能水工泵送混凝土试验研究

Properties on hydraulic green pumping high-performance concrete

研究了由少量熟料、高掺量工业废弃物制备的高掺量废渣水泥配制绿色高性能水工混凝土的工作性能、力学性能、热学性能、变形性能、抗渗性能。结果表明:高掺量废渣水泥代替中热硅酸盐水泥配制绿色高性能泵送水工混凝土是切实可行的,它能够显著改善混凝土拌合物的和易性、降低混凝土的绝热温升值、增加早期和后期强度、提高抗渗性,并能降低开裂敏感性的危害,为混凝土的可持续发展以及绿色高性能混凝土的大规模推广应用指明了一条新途径。

This paper presents a study on the behavior of hydraulic green pumping high-performance concrete produced from high content of industrial wastes cements. These blends were prepared by blending 40 % cement clinker with the combination of fly ash and blast furnace slag. Tests were conducted on the prepared concrete for workability, strength development, hydration heat, shrinkage behavior, and impermeability. The result indicated that concrete produced from blended cements had equivalent or higher strength than the control mixture at all test ages. Blended cements were effective in controlling shrinkage and hydration heat. They also reduced the deterioration of concrete due to shrinkage cracking and greatly increased the resistance to water penetration into the concrete. Moreover, the results can provide a new approach to the confinuable development of concrete.