No abstract

Recycling plastic waste to obtain new materials such as concrete or mortar seems to be one of the best solutions for disposing of plastic waste. Second, in the construction industry, due to the increasing costs of landfills and the lack of a natural large aggregate, the increased interest in crushed ceramics is significant. The third type of waste that is dealt with in this article is tea ash because tea is the second most consumed beverage in the world and large amounts of waste are generated. This article attempts to develop the appropriate characteristics of self-compacting concrete by adding the following waste materials: plastic waste, tea waste and collapsed ceramics. In this paper, Fresh and hardened properties of self-compacting concrete with waste materials were investigated. The diameter and time of sediment flow, segregation, L-box ratio, and density of freshly compacted concrete mixtures were measured. Moreover, both 7, 14, and 28-day bending strength and 7 and 28-day bending strength of hardened self-compacting concrete samples were measured. The results proved the possibility of using plastic waste, tea waste and collapsed ceramics in self-compacted concrete, because they do not significantly reduce the hardened and fresh properties of self-compacted concrete.

Concrete is a worldwide construction material, but it has inherent faults, such as a low tensile strength, when not reinforced with steel or other forms of reinforcement. Various innovative materials are being incorporated into concrete to minimise its drawbacks while concurrently improving its dependability and sustainability. This study addresses the research gap by exploring and enhancing the utilisation of glass fibre (GF) concerning its mechanical properties and reduction of embodied carbon. The most significant advantage of incorporating GF into concrete is its capacity to reduce the obstruction ratio, forming clusters, and subsequent material solidification. The study involved experiments wherein GF was incorporated into concrete in varying proportions of 0%, 0.5%, 0.75%, 1%, 1.25%, 1.50%, 1.75%, and 2% by weight. Mechanical tests and tests for durability were conducted, and Embodied carbon (EC) with eco-strength efficiency was also evaluated to assess the material’s sustainability. The investigation found that the optimal percentage of GF to be used in concrete is 1.25% by weight, which gives the optimum results for concrete’s mechanical strength and UPV. Adding 1.25% GF to the material results in increases of 11.76%, 17.63%, 17.73%, 5.72%, and 62.5% in C.S, STS, F.S, MoE, and impact energy, respectively. Concrete blended with 1.25% of GF has the optimum value of UPV. The carbon footprint associated with concrete positively correlates with the proportion of GF in its composition. The optimisation of GF in concrete is carried out by utilising the response surface methodology (RSM); equations generated through RSM enable the computation of the effects of incorporating GF in concrete.