RE-USE OF WASTE TIRES RUBBER AS FINE AGGREGATE REPLACEMENT IN CONCRETE MIX APPLICATIONS

Discarded waste tires are one of the important parts of solid waste which had historically been disposed of in to landfills also causing a serious environmental problem. Then this study explores the possibility of reusing discarded waste tires in concrete engineering applications through enhancing the properties of concrete mix as partial replacement with fine aggregate to produce ideal concrete mix. The percent of discarded waste tires substituted in to the concrete mix by weight (0%, 10%, 15%, and 20%) respectively. Two types of waste tires are used as (chips and grounded shape) applied at 68 experiments and tested their mechanical, physical and chemical properties with 260 test in order to determine the optimal enhancing replacement ratios of waste tires as (dry density, compressive and flexural strength, performing slump, and toughness indices) at curing ages of (3, 7, 28 and 56 days) for standard and improved concrete mix. The results for tests show a decline in compressive strength of the concrete in other hand an increase in their toughness with good approach properties and reduce the cost of additive materials, also solve a serious problem posed by waste tires.