Valorization of pozzolanicity of Algerian clay: Optimization of the heat treatment and mechanical characteristics of the involved cement mortars
作者： Siline Mohammed , Ghorbel Elhem , Bibi Mekki
DOI: 10.1016/J.CLAY.2016.08.027
关键词: Clinker (cement) 、 Mortar 、 Geology 、 Illite 、 Metallurgy 、 Cement 、 Gravimetric analysis 、 Calcination 、 Cementitious 、 Gypsum
摘要: Abstract The aim of this study is to optimize the pozzolanicity Algerian clay deposits that are essentially composed by calcite, dolomite, and illite/muscovite. heat treatment cycles were applied these raw materials varying target temperature holding time. evaluation dehydroxylation degrees determined different techniques such as thermal gravimetric (TG) analysis, differential scanning calorimetric (DSC) analysis Fourier transform infrared spectroscopy (FTIR). Results show optimal was obtained, if calcined at 700 °C for 5 h. Moreover, adding 10% heat-treated deposit 85% clinker 5% gypsum weight leads manufacturing blended cements with highest mechanical characteristics. Mortars elaborated studied their compressive strengths after exposure high up 1000 °C investigated through test age 90 days. It appears enhances normalized mortars early comparison those CEM I. However, opposite effects observed ages 28 days except treated 700 °C-5 h. This related presence new cementitious compounds (NCC) highlighted TG analysis. behavior temperatures not affected significantly when used. optimum cement Concretes manufactured exhibit quite similar than control one.
sci-hub.se 参考文章(42)
Inès Leana, Tchetgnia Ngassam, Durabilité des réparations des ouvrages d'art en béton Université Paris-Est. ,(2013)
Alejandra Tironi, Claudia C. Castellano, Viviana Bonavetti, Mónica A. Trezza, Alberto N. Scian, Edgardo F. Irassar, Blended Cements Elaborated with Kaolinitic Calcined Clays Procedia Materials Science. ,vol. 8, pp. 211- 217 ,(2015) , 10.1016/J.MSPRO.2015.04.066
J.P. Gonçalves, L.M. Tavares, R.D. Toledo Filho, E.M.R. Fairbairn, Performance evaluation of cement mortars modified with metakaolin or ground brick Construction and Building Materials. ,vol. 23, pp. 1971- 1979 ,(2009) , 10.1016/J.CONBUILDMAT.2008.08.027
Alberto Sepulcre Aguilar, Javier Pinilla Melo, Francisco Hernández Olivares, Microstructural analysis of aerated cement pastes with fly ash, Metakaolin and Sepiolite additions Construction and Building Materials. ,vol. 47, pp. 282- 292 ,(2013) , 10.1016/J.CONBUILDMAT.2013.05.082
T. Seiffarth, M. Hohmann, K. Posern, Ch. Kaps, Effect of thermal pre-treatment conditions of common clays on the performance of clay-based geopolymeric binders Applied Clay Science. ,vol. 73, pp. 35- 41 ,(2013) , 10.1016/J.CLAY.2012.09.010
Şemsi Yazıcı, Gözde İnan Sezer, Hakan Şengül, The effect of high temperature on the compressive strength of mortars Construction and Building Materials. ,vol. 35, pp. 97- 100 ,(2012) , 10.1016/J.CONBUILDMAT.2012.02.082
Lucia Pagliari, Monica Dapiaggi, Alessandro Pavese, Fernando Francescon, A kinetic study of the quartz-cristobalite phase transition Journal of The European Ceramic Society. ,vol. 33, pp. 3403- 3410 ,(2013) , 10.1016/J.JEURCERAMSOC.2013.06.014
A CHAKCHOUK, B SAMET, T MNIF, Study on the potential use of Tunisian clays as pozzolanic material Applied Clay Science. ,vol. 33, pp. 79- 88 ,(2006) , 10.1016/J.CLAY.2006.03.009
Ch. Bich, J. Ambroise, J. Péra, Influence of degree of dehydroxylation on the pozzolanic activity of metakaolin Applied Clay Science. ,vol. 44, pp. 194- 200 ,(2009) , 10.1016/J.CLAY.2009.01.014
Changling He, Bjarne Osbaeck, Emil Makovicky, Pozzolanic reactions of six principal clay minerals: Activation, reactivity assessments and technological effects Cement and Concrete Research. ,vol. 25, pp. 1691- 1702 ,(1995) , 10.1016/0008-8846(95)00165-4