Title of article :
Feasibility of Design One-Part Sodium Silicate Activated Metamontmorillonite-Limestone Cements
Author/Authors :
Rakhimova ، Nailia R. Department of Building Materials - Kazan State University of Architecture and Engineering , Morozov ، Vladimir P. Department of Mineralogy and Lithology - Kazan Federal University , Eskin ، Aleksey A. Department of Mineralogy and Lithology - Kazan Federal University , Galiullin ، Bulat M. Department of Regional Geology and Natural Resources - Kazan Federal University
Abstract :
This study evaluated the potential of calcined montmorillonite as a primary precursor for one-part alkali-activated cement incorporated with a high percentage of limestone. Comparative studies on the properties of the sodium silicate-activated metakaolin-limestone and meta montmorillonite-limestone fresh and hardened cement pastes depending on several formulation and processing parameters (precursor nature, dosages of limestone and alkali reactant, curing conditions) showed that meta montmorillonite exhibits reactivity comparable to that of metakaolin in the studied cement systems. The mechanical performance of optimal alkali-activated cement formulations consisting of 20- 30% of meta montmorillonite and 70- 80% of limestone is provided by both the reactivity of meta montmorillomite under sodium silicate activation and the filler, nucleation, and chemical effects of the raw limestone. The reaction products and microstructures of alkali-activated meta montmorillonite-limestone cement-based hardened pastes were investigated using thermal, XRD, and SEM/EDS analyses.
Keywords :
Metakaolin , Meta montmorillonite , Alkali , Cement
Journal title :
Iranian Journal of Materials Science and Engineering
Journal title :
Iranian Journal of Materials Science and Engineering