Preparation of low water-sorption lightweight aggregates from harbor sediment added with waste glass |
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| Institution: | 1. Italian Council for Agricultural Research and Economics (CREA-RPS), Via della Navicella 2-4, I-00184 Rome, Italy;2. Department of Agricultural and Forestry scieNcEs (DAFNE), Tuscia University, Via S. Camillo de Lellis, I-01100 Viterbo, Italy;3. Italian National Institute of Statistics (ISTAT), Via C. Balbo 16, I-00184 Rome, Italy;4. Tulane University, Payson Program in International Development at the School of Law, New Orleans, USA;5. Via A. Di Tullio 40, I-00136 Rome, Italy |
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| Abstract: | A harbor sediment is successfully recycled at 1150 °C as low water-absorption lightweight aggregate via addition of waste glass powder. Sodium content in the waste glass is responsible for the formation of low-viscosity viscous phases during firing process to encapsulate the gases generated for bloating pellet samples. Water sorption capacity of the lightweight products can be considerably reduced from 5.6% to 1.5% with the addition of waste glass powder. Low water-absorption property of lightweight products is beneficial for preparing lightweight concrete because the water required for curing the cement would not be seized by lightweight aggregate filler, thus preventing the failure of long-term concrete strength. |
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