Mechanical and acoustic absorption properties of lightweight fly ash/slag-based geopolymer concrete with various aggregates |
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| Affiliation: | 1. Civil Engineering Department, Faculty of Engineering, Fayoum University, Fayoum, Egypt;2. Department of Construction and Building Engineering, High Institute of Engineering, October 6 City, Egypt;3. Housing and Building National Research Center (HBRC), Giza, Egypt;4. Civil Engineering Department, Faculty of Engineering, Fayoum University, Fayoum, Egypt;5. Institute of Construction and Architecture, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 03 Bratislava, Slovak Republic;1. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming, 650093, China;2. National Engineering Research Center of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China;3. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China;4. Fachgebiet Angewandte Nanophysik, Institut für Physik & ZMN MacroNano (ZIK), Technische Universität Ilmenau, Ilmenau, 98693, Germany;1. College of Chemistry & Materials Science, Longyan University, Longyan, Fujian, 364000, China;2. College of Materials Science and Engineering, Liaocheng University, Liaocheng, Shandong, 252000, China;1. Universidad Autónoma de Nuevo León, Instituto de Ingeniería Civil, Departamento de Ecomateriales y Energía, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, N.L., Mexico;2. Centro de Investigación en Materiales Avanzados, S.C. (CIMAV) Miguel de Cervantes 120 Complejo Industrial Chihuahua, C.P. 31136, Chihuahua, Chih., Mexico;3. Facultad de Ciencias Biológicas, Departamento de Alimentos, Laboratorio de Reología, Cd. Universitaria, Universidad Autónoma de Nuevo León, C.P. 66455, San Nicolás de los Garza, N.L., Mexico;4. Facultad de Ciencias Biológicas, Departamento de Microbiología e Inmunología, Laboratorio de Inmunología y Virología, Cd. Universitaria, Universidad Autónoma de Nuevo León, C.P. 66455, San Nicolás de los Garza, N.L., Mexico;5. CONACYT - Universidad Autónoma de Nuevo León, Instituto de Ingeniería Civil, Departamento de Ecomateriales y Energía, Cd. Universitaria, C.P. 66455, San Nicolás de los Garza, N.L., Mexico;1. Laboratory of Technology Energy and Innovative Materials, Sciences Faculty, University of Gafsa, Gafsa, 2112, Tunisia;2. Sciences Faculty, University of Tunis El Manar, Tunis, 2092, Tunisia;3. Department of Physics, Faculty of Science, Isra University, Amman, Jordan;4. Department of Nuclear Medicine Research, Institute for Research and Medical, Consultations (IRMC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia;5. Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia;6. Physics Department, College of Sciences, University of Bisha, P.B. 551, Bisha, 61922, Saudi Arabia;1. Department of Physics, Faculty of Science, Beirut Arab University, P.O. Box 11–5020 Riad El Solh, Beirut, Lebanon;2. Department of Physics, Faculty of Science, Alexandria University, Alexandria, 21511, Egypt;1. Materials Science Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;2. Glass and Advanced Materials Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;3. Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;4. Technical Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;5. Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India;6. Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400 094, India |
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| Abstract: | Acoustic absorption and thermal insulation play a key role in modern buildings to make living comfortable and energy-saving. This paper aims to study the workability, physical and mechanical properties, thermal conductivity, and acoustic absorption of modified geopolymer concrete (GPC) with various types of lightweight aggregates (LWA) such as extruded polystyrene foam beads waste (EPS), vermiculite, or lightweight expanded clay aggregate (LECA). The mixtures of geopolymer concrete have been modified by substituting for the ordinary aggregates (dolomite) by volume with various ratios of 0, 25, 50, 75, and 100% for each type of LWA. Besides, the mechanisms of specimens were examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and mapping. The results illustrated that the compressive strength values range between 8.5 and 47.50 MPa. The hardened density of concrete was between 1500 and 2450 kg/m3, and thermal conductivity was between 0.45 and 1.16 W/m.K. Geopolymer concrete was considered an acoustic absorption and thermally insulating material. Geopolymer concrete was considered an acoustic absorption and thermally insulating material. EPS, vermiculite, and LECA will be beneficial for applications in lightweight geopolymer concrete due to their capability to reduce weight and excellent thermal conductivity, and the property of improving acoustic absorption. The mechanical results indicated that 25% LECA was the best compared with the ratios of other LWA and gained 35.0, 2.7, and 4.3 MPa of compressive, splitting tensile and flexural strength, respectively. It had positive workability; the thermal conductivity was 1.1 W/m.K, and hardened density was decreased to 10% compared to the control. In addition, LECA is considered the superior and suitable material for acoustic absorption compared with other aggregates. |
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| Keywords: | Geopolymer concrete Extruded polystyrene foam beads waste Vermiculite and lightweight expanded clay aggregate Mechanical properties Thermal conductivity Acoustic absorption |
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