The durability of concrete containing recycled tyres as a partial replacement of fine aggregate

Abstract

Abstract. Nowadays, uncontrolled disposal of waste materials such as tyres can affect the environment. Therefore, careful management of waste disposal must be done in order to conserve the environment. Waste tyres can be use as a replacement for both fine aggregate and coarse aggregate in the production of concrete. This research was conducted to assess the durability of concrete containing recycled tyres which have been crushed into fine fragments to replace fine aggregate in the concrete mix. This study presents an overview of the use of waste rubber as a partial replacement of natural fine aggregate in a concrete mix. 36 concrete cubes measuring 100mm x 100mm x 100mm and 12 concrete cubes measuring 150mm x 150mm x 150mm were prepared and added with different percentages of rubber from recycled tyres (0%, 3%, 5% and 7%) as fine aggregate replacement. The results obtained show that the replacement of fine aggregate with 7% of rubber recorded a compressive strength of 43.7MPa while the addition of 3% of rubber in the concrete sample recorded a high compressive strength of 50.8MPa. This shows that there is a decrease in the strength and workability of concrete as the amount of rubber used a replacement for fine aggregate in concrete increases. On the other hand, the water absorption test indicated that concrete which contains rubber has better water absorption ability. In this study, 3% of rubber was found to be the optimal percentage as a partial replacement for fine aggregate in the production of concrete.

High yield and simple one-step production of carbon black nanoparticles from waste tires

“…Considering all this, recycling of waste plastics in new applications is highly desirable and has a beneficial impact on the environment and the economy. Some other alternatives for the reuse of waste tires include their use as a fuel in cement kilns [6], to produce carbon black [7,8], in asphalt pavements [9] or as aggregates in concrete [2,3,10].…”

Ductility performance of reinforced rubberised concrete beams incorporating burnt clay powder

“…For instance, nearly 1000 million tires conclude their life each year of which more than 50% are disposed without any treatment [1]. Waste Tire Rubber (WTR) is a main non-biodegradable waste which is hazardous to the surrounding [2,3]. The use of WTR in concrete production has been reported to significantly assist in recycling of tires generated across the world [4].…”