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A platform for research: civil engineering, architecture and urbanism
Production and properties of lightweight concrete incorporating recycled waste crushed clay bricks
Highlights CCB can be used as a full substitute for fine or/and coarse aggregate in concrete. SLWAC has been successfully produced when using CCB as fine and coarse aggregates. The thermal properties of concrete improve when using CCB aggregate. CBP can replace cement without significant deterioration of concrete properties. CBP particles showed high pozzolanic reactivity as revealed by TGA and XRD analyses.
Abstract The huge amount of waste crushed clay bricks (CCB) causes serious environmental problems worldwide. To deal with this issue and preserve natural resources, CCB can be recycled and reused in the concrete industry. This paper investigated the influence of CCB as substitution of cement and aggregates on the physical, mechanical, and microstructural properties of concrete. Eight mixtures were prepared and tested to find out the possibility of reusing CCB as aggregate and as cementitious material for structural concrete production. Several experiments have been performed to assess the performance of the concrete. Concrete workability was assessed by measuring the slump of fresh concrete. For hardened properties evaluation, dry density, compressive strength, ultrasonic pulse velocity, porosity, thermal conductivity, water penetration test, and sorptivity tests have been investigated. In addition, scanning electron microscopy, X-ray diffraction, and thermo-gravimetric analysis were implemented to analyze the morphology and microstructure characteristics of concrete. The experimental results indicated that CCB can be reutilized as a replacement of normal-weight aggregates to obtain structural lightweight aggregate concrete with appropriate properties. It was also proved that grinded CCB has a proper pozzolanic activity and can be used as supplementary cementitious material to reduce cement content without significant deterioration of concrete properties.
Production and properties of lightweight concrete incorporating recycled waste crushed clay bricks
Highlights CCB can be used as a full substitute for fine or/and coarse aggregate in concrete. SLWAC has been successfully produced when using CCB as fine and coarse aggregates. The thermal properties of concrete improve when using CCB aggregate. CBP can replace cement without significant deterioration of concrete properties. CBP particles showed high pozzolanic reactivity as revealed by TGA and XRD analyses.
Abstract The huge amount of waste crushed clay bricks (CCB) causes serious environmental problems worldwide. To deal with this issue and preserve natural resources, CCB can be recycled and reused in the concrete industry. This paper investigated the influence of CCB as substitution of cement and aggregates on the physical, mechanical, and microstructural properties of concrete. Eight mixtures were prepared and tested to find out the possibility of reusing CCB as aggregate and as cementitious material for structural concrete production. Several experiments have been performed to assess the performance of the concrete. Concrete workability was assessed by measuring the slump of fresh concrete. For hardened properties evaluation, dry density, compressive strength, ultrasonic pulse velocity, porosity, thermal conductivity, water penetration test, and sorptivity tests have been investigated. In addition, scanning electron microscopy, X-ray diffraction, and thermo-gravimetric analysis were implemented to analyze the morphology and microstructure characteristics of concrete. The experimental results indicated that CCB can be reutilized as a replacement of normal-weight aggregates to obtain structural lightweight aggregate concrete with appropriate properties. It was also proved that grinded CCB has a proper pozzolanic activity and can be used as supplementary cementitious material to reduce cement content without significant deterioration of concrete properties.
Production and properties of lightweight concrete incorporating recycled waste crushed clay bricks
Atyia, May M. (author) / Mahdy, Mohamed G. (author) / Abd Elrahman, Mohamed (author)
2021-08-21
Article (Journal)
Electronic Resource
English
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