Properties and hydration of blended cements with steelmaking slag
Properties and hydration of blended cements with steelmaking slag
复制标题
DOI：
10.1016/j.cemconres.2007.03.008
复制
发表时间：
2007-06-01
影响因子：
11.4
通讯作者：
Tsibouki, Z.
中科院分区：
文献类型：
--
作者：
Kourounis, S.;Tsivilis, S.;Tsibouki, Z.
本文研究了炼钢过程中产生的副产物——炼钢渣混合水泥的性能和水化性能。为此，对参考样品和三种钢渣含量高达45%的水泥进行了测试。由于钢渣中硅酸钙相含量高，故选用“0 ~ 5mm”钢渣。测定了初凝时间、终凝时间、标准稠度、普通砂浆流量、2、7、28和90 d的热压釜膨胀率和抗压强度。水合产物用x射线衍射鉴定，不可蒸发水分用热重分析仪测定。用扫描电镜观察了硬化水泥浆体的微观结构和形态特征。结果表明，矿渣可用于生产en197 -1强度等级42.5和32.5的复合水泥。此外，矿渣水泥还表现出令人满意的物理性能。由于钢渣中C2S的形态和硅酸钙含量较低，减缓了水泥的水化速度。(c) 2007 Elsevier Ltd.版权所有。
The present research study investigates the properties and hydration of blended cements with steelmaking slag, a by-product of the conversion process of iron to steel. For this purpose, a reference sample and three cements containing up to 45% w/w steel slag were tested. The steel slag fraction used was the "0-5 mm", due to its high content in calcium silicate phases. Initial and final setting time, standard consistency, flow of normal mortar, autoclave expansion and compressive strength at 2, 7, 28 and 90 days were measured. The hydrated products were identified by X-ray diffraction while the non-evaporable water was determined by TGA. The microstructure of the hardened cement pastes and their morphological characteristics were examined by scanning electron microscopy. It is concluded that slag can be used in the production of composite cements of the strength classes 42.5 and 32.5 of EN 197-1. In addition, the slag cements present satisfactory physical properties. The steel slag slows down the hydration of the blended cements, due to the morphology of contained C2S and its low content in calcium silicates. (c) 2007 Elsevier Ltd. All rights reserved.