Influence of mineralogical composition on the properties of lightweight aggregate |
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| Authors: | Hu Shuguang Yang Tingting Wang Fazhou |
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| Affiliation: | 1. Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Building Surveying, Faculty of Built Environment, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132000, China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;1. School of Civil Engineering and Architecture, Northeast Dianli University, Jilin 132000, China;2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;1. Geology Department, Faculty of Science, Ain Shams University, Cairo 11566, Egypt;2. Department of Geosciences, University of Bremen, Klagenfurter Straße, D-28359 Bremen, Germany;3. Ceramic Department, National Research Center, Dokki, Cairo 12622, Egypt;1. Grupo de Investigaciones Ambientales (GIA), Universidad Pontificia Bolivariana (UPB), Circular 1ra N° 74-50, Medellín, Colombia;2. Grupo de Investigaciones sobre Nuevos Materiales (GINUMA), Universidad Pontificia Bolivariana (UPB), Circular 1ra N° 73-76, Medellín, Colombia |
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| Abstract: | When sintering artificial lightweight aggregate, rapid cooling will generate micro-cracks. The paper investigates the effect of MgO contents on the physical, chemical and microstructural properties of artificial lightweight aggregate prepared under natural cooling in the furnace (SC) and rapid cooling outside the furnace (RC). Results indicate that cordierite (2MgO?2Al2O3?5SiO2) starts forming in lightweight aggregate when MgO content reaches 2%, accompanied by a reduction in mullite. Cordierite has a better thermal-shock resistance and its presence minimizes the potential for micro-crack formation, thus decreasing water absorption under rapid cooling conditions for the 2% MgO system. |
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