The article deals with the strength of geo-polymer concrete built on fly ash using recycled aggregate with silica fume. The strength of geo-polymer concrete with various molarities including 8, 10, and 12 M, respectively, was discovered. The natural aggregates in the concrete were eliminated by 100 recycled aggregates. The compressive strength, split tensile, flexural strength and flexural behaviour of the beams has been studied. In a heat curing chamber at 65 degrees C, all geo-polymer concrete (GPC) specimens were cured. The strength of all specimens has been determined by the Adaptive cuckoo search optimisation (ACSO) algorithm. The strength of the specimens was found in 7 and 28 days. The test results were compared with geo-polymer concrete made with natural coarse aggregates. Due to recycled aggregate, the strength of concrete was reduced. The reduced strength was improved by adding silica fume at the weight rate of 5, 10 and 15 fly ash. The experiment has given final conclusion that the geo-polymer concrete using recycled aggregate with silica fume gives better results than natural aggregate.
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