The influence of steel slag on the hydration of cement during the hydration process of complex binder

Abstract

The influence of steel slag, a by-product from the processing of iron to steel, on the hydration of cement during the hydration process of complex binder was studied by calorimetry, X-ray diffraction analysis, and Ca(OH) 2 content determination. The results show that steel slag and cement affect each other's hydration by changing the hydration environment. Steel slag does not react with the hydration products of cement. The dormant period of cement-steel slag complex binder during the hydration is longer than that of cement. The more the adding amount of steel slag is, the longer the dormant period of complex binder will be. The steel slag decreases the early hydration rate of cement. This phenomenon is more obvious with the increment of steel slag addition. However, the steel slag can promote the hydration degree of cement at later ages and the promoting effect becomes more obvious with the increment of steel slag addition and the hydration ages. steel slag, cement, complex binder, hydration Citation:Wang Q, Yan P Y, Han S. The influence of steel slag on the hydration of cement during the hydration process of complex binder.

Preliminary investigation on the pozzolanic activity of superfine steel slag

“…However, as the hydration age increased, the gap between pure cement mortar and blended cement mortars became smaller. This is because the cementitious part of steel slag makes a great contribution to the strength of blended cement mortars and steel slag can promote the hydration degree of cement at later ages [20].…”

Early Hydration Kinetics of Cementitious Materials Containing Different Steel Slag Powder Contents

“…Krstulovic [6] reported that the hydration reaction process of cement-based materials consists of three stages, namely nucleation and crystal growth (NG), interactions at phase boundaries (I) and diffusion (D). By using the Krstulovic-Dasic model, Yan Peiyu [7][8][9], Wang Qiang et al [10][11][12][13][14] discussed the hydration rate of cementGGBSsteel slagprobed into the hydration kinetics of cementbased cementitious materials, and revealed that the reaction process simulated by the Krstulovic-Basic model [6] is consistent with the actual reaction process.…”

Hydration heat evolution and kinetics of blended cement containing steel slag at different temperatures

“…Tsakiridis et al [8] studied the utilization of steel slag for Portland cement clinker production and pointed out that the addition of steel slag by 10.5% in the raw meal did not affect the hydration process during Portland cement production. Wang et al [10] found that the dormant period of blended cement containing steel slag is longer than that of Portland cement. Monshi and Asgarani [11] found that blending 10% extra iron slag to a cement composed of 49% iron slag, 43% calcined lime and 8% steel slag kept the compressive strength of concrete for type I Portland cement.…”