Strength and chemical resistance of mortars containing brick manufacturing clays subjected to different treatments |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, University of Pittsburgh, PA 15261, USA;2. Shanghai Research Institute of Building Science, 200032, China;3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 430072, China;4. Dujiangyan Recycled Construction Material Company, China;1. School of Mineral Resources Engineering, Technical University of Crete, 73100 Chania, Greece;2. School of Mining and Metallurgical Engineering, National Technical University of Athens, Zografos Campus, 15780 Athens, Greece;1. School of Civil and Architectural Engineering, Yangtze Normal University, Chongqing 408100, China;2. School of Civil Engineering, University of Leeds, LS2 9JT, UK;3. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;4. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China;5. Green Intelligence Environment School, Yangtze Normal University, Chongqing 408100, China;1. EMC - Department of Mechanical Engineering and Construction, Universitat Jaume I, Castellón de La Plana, Spain;2. ICITECH - Instituto de Ciencia y Tecnología Del Hormigón, Grupo de Investigación en Química de Los Materiales (GIQUIMA), Universitat Politècnica de València, Valencia, Spain;1. College of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;2. College of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou 450001, China;3. Multi-functional Design and Research Academy, Zhengzhou University, Zhengzhou 450052, China;1. Department of Structural Engineering, Tongji University, Shanghai, PR China;2. Department of Civil Engineering, University of Nottingham Ningbo China, Ningbo, PR China;3. Key Laboratory of Performance Evolution and Control for Engineering Structures, Tongji University, Ministry of Education, PR China |
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| Abstract: | This paper presents the results of an investigation of the properties of mortar in which a calcined clay was employed as a pozzolan. Mortars were prepared using either heat treated clay or ground waste clay bricks (from the same clay subjected to 1000 °C calcining) as a pozzolanic partial replacement for cement at replacement levels of 10%, 20% and 30%. The compressive strengths of the mortars were monitored up to 90 days and the resistance to sodium sulphate solution and synthetic seawater was monitored up to 300 days. The specimens were also monitored for weight changes. Partially replacing cement by ground brick or heat-treated brick clay gives early strengths that are lower than that of the control. At 90 days, however, the strengths are the same as or are greater than that of the control. Heat-treated clay is effective in reducing expansion during exposure of the mortar to sulphate solution and synthetic seawater. The rapidly cooled clay gives better performance, in terms of strength development and resistance to harmful solutions, than the slow cooled clay. |
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