Development of alkali activated cement from mechanically activated silico-manganese (SiMn) slag

Kumar, Sanjay and Garcia-Trinanes, P and Teixeira-Pinto, A and Bao, M (2013) Development of alkali activated cement from mechanically activated silico-manganese (SiMn) slag. Cement & Concrete Composites, 40 . pp. 7-13.

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Silico-manganese (SiMn) slag has been used to develop alkali activated cement binder. The reactivity of SiMn slag was altered by mechanical activation using eccentric vibratory and attrition mill. The reaction kinetics during alkali activation of SiMn slag and structural reorganization were studied using isothermal conduction calorimetry and Fourier transform infrared spectroscopy. The particle size after milling was smaller in attrition milled samples but reaction started earlier in vibratory milled samples due to more reactivity. This observation was further supported by compressive strength which was highest in samples prepared from vibratory milled slag. The main reaction product was C-S-H (C = CaO, S = SiO2, H = H2O) of low crystallinity of different types with varying Si/Al and Ca/Si ratio. An attempt has been made to relate the microstructure with mechanical properties. The results obtained in this study establish technical suitability of SiMn slag as raw material for alkali activated cement. (C) 2013 Elsevier Ltd. All rights reserved

Item Type:Article
Official URL/DOI:DOI: 10.1016/j.cemconcomp.2013.03.026
Uncontrolled Keywords:Alkaline activation; SiMn slag; Reaction kinetics; Microstructure; Properties
Divisions:Metal Extraction and Forming
ID Code:6667
Deposited By:Dr. A K Sahu
Deposited On:12 Jul 2013 09:27
Last Modified:27 Jan 2014 16:00
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