الفهرس 
Treatment of rubberOnly 14 pages are availabe for public view
 |  | from | 113 |  |  |
| | | from | 113 | | |
Abstract
Among industrial wastes, tyre rubber waste is one of the most dangerous
wastes that are being produced and amassed on a global scale every year.Impact resistance and mechanical properties of concrete were used to
evaluate the influence of using waste tyre rubber as fine aggregate in this
experimental study. In this research, twelve different types of concrete
were cast by replacing fine aggregate of sand particles with fine rubbers
using different ratios of 0%, 10%, 20%, 30%,40%, and 50%. Dolomite was used as coarse aggregate and silica fume (SF) with a constant content equal to (12.5%) cement weight. NaOH solution was used for the pretreatment of waste crumb rubber (CR) particles for 24 hr., and steel fibre (Stf) was added with constant content equal to 1% by volume. Experiments on slump, density, compressive, splitting tensile, flexural strength, impact resistance and chloride penetration were done. Furthermore, scanning electron microscopy (SEM) was investigated for its use in revealing
concrete’s microstructure features. The results are shown by replacing 50%
of the fine aggregate, a decrease in workability and dry density was 24%
lower than the control mix.