Tag Archives: Slag

The Influence of Slag on the Hydration of Cement

These following conclusions are summarized from the work of Kocaba’s PhD thesis. alite: no influence is shown on the consumption of alite measured by XRD. belite: the substitution of cement by both slags seems to result in a delay in the hydration of belite in the first days. aluminate phase: there is a filler effect […]

Sample Preparation for Quantitative X-Ray Diffraction (XRD/Rietveld)

Theoretical background: see chapters 3 and 4 in Machiels (2010). Sample preparation method modified from Machiels et al. (2008). Representative sampling The mineralogy and glass content of slags depend largely on the mode of cooling of the slags, e.g. slow cooling in a slag pot can result in a large amount of crystalline phases, and […]

Determining the Amount of Reacted Slag in Blended Cement Using EDTA Method

1 Procedure of EDTA A typical chemical reaction of a slag could be like the following [NIST, D.P Bentz], C7.88S7.39M3A + 2.6CH + bH → 7.39C1.42SHmA0.046 + 0.66M4.6AHd C=CaO, S=SiO2, M=MgO, A=Al2 O3, CH=Ca(OH)2, H=H2O. The method EDTA (Ethylenediaminetetraacetic acid) has been described by Erntroy [Erntry, 1987]. The following is a short description of the method. […]