impact resistance of concrete containing lldpe–waste tire rubber and silica fume

Some of the desirable properties of concrete include high impact resistance and great energy-sucking capacity to name a few. these properties can be improved through the use of sustainable materials. this study investigated the effects of partly replacing fine aggregate with linear low-density polyethylene (lldpe) and waste rubber (wr) as fine aggregates on the efficiency of concrete under impact loading. two water to binder ratio (w/b) percentages of (0.40 and 0.55) were selected, with six (lldpe-r) replacement grades (0%, 5%, 10%, 15%, 20%, and 30%) and two silica fume (sf) replacement grades (0% and 15%). six cylinders with 150 and 60 mm were subjected to an impact by a 4.45 kg hammer striking. test results indicated that impact resistance for the first visible crack and the ultimate failure increased with lldpe-r content, where it increased by 4.76 times. this study also demonstrated that the impact resistance for the first visible crack of lldpe-r concrete was improved by an average of 295% for specimens without sf and 292% for specimens containing sf. this enhancement for the ultimate failure is 291% and 290% for specimens without sf and containing sf, respectively.