钢渣在蒸养混凝土中应用的实验研究（英文）

发布时间：2018-06-05 05:45

本文选题：蒸养 + 钢渣　；参考：《Journal of Southeast University(English Edition)》2017年03期

【摘要】：旨在研究钢渣作为矿物掺合料在蒸养混凝土中应用的可能性.研究了混凝土抗压强度、氯离子渗透性、碳化深度和干燥收缩及硬化浆体微结构特性.结果表明:在高水胶比条件下,含钢渣蒸养混凝土的抗压强度低,孔结构粗化,渗透性等级为"中",碳化深度和干燥收缩大.降低水胶比或掺入超细矿渣可降低钢渣对蒸养混凝土力学性能和耐久性的负面影响.掺加钢渣显著地促进了水泥的后期水化.超细矿渣的火山灰反应和微集料填充效应使混凝土的结构致密,对混凝土的强度发展和耐久性有一定贡献.在低水胶比条件下,钢渣和超细矿渣的作用更加明显.低水胶比下含钢渣和超细矿渣复合矿物掺合料蒸养混凝土的性能最佳,获得的抗压强度高,孔结构细化,耐久性优异.
[Abstract]:The purpose of this paper is to study the possibility of application of steel slag as mineral admixture in steaming concrete. The compressive strength of concrete, chloride ion permeability, carbonation depth, drying shrinkage and microstructure of hardened paste were studied. The results show that under the condition of high water-binder ratio, steaming concrete containing steel slag has low compressive strength, coarse pore structure, medium permeability, high carbonation depth and large drying shrinkage. The negative effect of steel slag on mechanical properties and durability of steaming concrete can be reduced by reducing water binder ratio or adding ultrafine slag. The addition of steel slag significantly promoted the hydration of cement in the later stage. The pozzolanic reaction of ultrafine slag and the filling effect of micro-aggregate make the structure of concrete compact and contribute to the strength development and durability of concrete. The effect of steel slag and ultrafine slag is more obvious under the condition of low water / binder ratio. The steaming concrete containing steel slag and superfine slag has the best properties, high compressive strength, fine pore structure and excellent durability.
【作者单位】：北京科技大学土木与资源工程学院;北京建筑大学土木与交通工程学院;
【基金】：Postdoctoral Science Foundation of China(No.2015M580992,2016T90036) the Open Fund of State Key Laboratory of High Performance Civil Engineering Materials(No.2015CEM010)
【分类号】：TU528

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