Utilisation of high volumes of limestone quarry wastes in concrete industry (self-compacting concrete case) |
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| Institution: | 1. Technion – Israel Institute of Technology, Faculty of Civil and Environmental Engineering, Haifa 3200003, Israel;2. University of Toronto, Department of Civil Engineering, 35 St. George Street, Toronto, ON M5S 1A4, Canada;1. Department of Civil Engineering, Federal University of Espírito Santo (UFES), Brazil;2. Department of Civil Engineering, Federal University of Santa Catarina (UFSC), Brazil;3. Laboratory of Application of Nanotechnology in Civil Construction (LabNANOTEC), Federal University of Santa Catarina, Brazil;4. Department of Civil, Architectural, and Environmental Engineering, University of Texas at Austin, USA;1. Department of Civil and Environmental Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;2. Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;1. Federal University of Espírito Santo, Brazil;2. Federal University of Santa Catarina, Brazil;3. Laboratory of Application of Nanotechnology in Civil Construction (LabNANOTEC), Federal University of Santa Catarina, Brazil;4. The University of Texas at Austin, USA;1. Building Materials Research and Quality Control Institute, Housing and Building National Research Center, Cairo, Egypt;2. Department of Structural Engineering, Faculty of Engineering, Cairo University, Egypt |
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| Abstract: | In limestone quarries, considerable amounts of limestone powders are being produced as by-products of stone crushers. High amounts of powders are being collected and utilisation of this by-product is a big problem from the aspects of disposal, environmental pollution and health hazards. In conventional concrete, the introduction of high volumes of limestone quarry dust to concrete mixes is limited due to its negative effects on water demand and strength of concrete. However, these fines can be efficiently utilised as viscosity enhancer particularly in special concrete (like self-compacting concrete—SCC) applications. Thus, the successful utilisation of this quarry dust in SCC could turn this material into a valuable resource.In this paper the usability of a quarry dust limestone powder in self-compacting paste and concrete applications was investigated. In the first part, the physical and mechanical properties of cement pastes incorporating quarry waste limestone powder (QLP) and a powder produced by direct grinding of limestone (PLP) were compared. In the second part, the performance of quarry waste limestone powder in SCC applications were tested and discussed. Results showed that, it is possible to successfully utilise high amounts of quarry waste limestone powder in producing normal-strength SCCs. Among its observed mechanical advantages, employment of quarry waste limestone powders improved the economical feasibility of SCC production. |
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