الفهرس | Only 14 pages are availabe for public view |
Abstract This work aims to investigate the feasibility of manufacturing Geopolymer concrete using recycled aggregate as a sustainable ecofriendly concrete. Different properties of Geopolymer concrete cast using fly ash, recycled aggregate and locally available materials were studied. Sodium Silicate and Sodium Hydroxide solutions are used as alkali activators in different mix proportions. Two mixes with different Molarity were used to compare the alkaline activator solution’s effect on the concrete properties. Geopolymer concrete was cured under a heated oven of 800C. Geopolymer concrete samples were compared to conventional concrete samples. Geopolymer concrete slabs/laminates were cast using reinforced with expanded metal meshes to study their behavior. The durability of Geopolymer concrete was investigated through the exposure of test specimens to the acid solution and sulfuric salt solution. A comparison between geopolymer and conventional concretes under aggressive conditions was conducted based on the compressive strength values. Results showed that the geopolymer concrete nearly behaves in the same manner as the conventional concrete. The properties of (10M) geopolymer concrete are nearly the same as the conventional concrete. The durability of a geopolymer is better than that of conventional concrete, especially when exposed to sulfate or chloride attack. After exposed to the sodium chloride solution, the compressive strength decreased for geopolymer concrete and conventional concrete. Also, the steel reinforcement in Geopolymer concrete protected than that in conventional concrete. Geopolymer concrete is a sustainable durable building material, which may stand against a corrosive environment. |