ASSESSMENT OF THE HYDRATION CONSTANTS OF POST BLENDED BLAST FURNACE SLAG CEMENTS

Author(s): Visser, J., van Zon, Q., Beijersbergen, H., Hacquebord, A. and van Zwet, R.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 101-108
Total Pages: 8
Language: English

Abstract: Hydration constants have been determined for post blended OPC /slag blends, by means of measuring the amount of bound water in OPC / slag blends for three different temperature regimes: from 105 to 950oC, 400 to 600oC and 600 to 950oC. These measurements have been performed for three different OPCs, each at 5 different replacement percentages of slag and at four ages. Based on the measured linear relationship between the amount of bound water with slag replacement, the effect of the slag replacement on the water contents could be separated from that of the pure OPCs. Time effects were next eliminated by modelling the results with help of a hydration model on the basis of the observed exponential increase in water contents with time. The resulting hydration constants were obtained for the total nonevaporable water content showing different values from 0.19 to 0.22 for the three different OPCs correlating well with other data from literature. A constant value of 0.06 was found for the slag. For the bound water associated with the calcium hydroxide, constants were approximately 0.07 for the OPC cements and 0.02 for the slag. For the Type I CSH or meta-jennite the constant was 0.06 to 0.1 for the OCPs and zero for the slag.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00