ICT, AI, IOTs and technology applications in education - A case with accelerometer and internet learner gender prediction

This article investigates how to improve the performance of concrete by using rubber from used tyres, resulting in environmentally friendly concrete with reduced risk. The study of rubber effects on some physical and mechanical properties of concrete. Rubber was used to replace fine or coarse aggregates. The findings of fine and coarse aggregates were then compared to determine the best substitution. The thermal insulation and mechanical strength of lightweight concrete are investigated as the primary requirements. The use of waste tyres in concrete can lead to massive environmental and sustainability benefits. Rubber concrete can deform but not split when chipped rubber aggregate is used. Crumbed use has a higher isolation performance than other sizes due to its better void filling ability. Furthermore, replacing fine aggregates reduces conductivity even further, which was 32.76% less than the control mix. Also, the density decreased by 6% when using chipped rubber at 25% replacement, compared to the control mix , the reduction in density and thermal conductivity is a good advantage for many applications. The workability recorded the highest decrease of 42%, the compressive 48.75%, the flexural 15.78%, and the splitting was 24.50%, replacing 25%. The microstructure images showed a lack of bonding between the rubber and the cement matrix.