Abstract
Different particle sizes of waste rubber are mixed according to natural fine aggregate gradation to replace the fine aggregate in concrete by weight. And the effect of waste rubber content on performances of concrete mixture, the mechanics, frost resisting, thermal insulation of hardened concrete are studied. The results show that the slump and apparent density of concrete mixture decreases with the increase of waste rubber content. Compressive strength of the hardened concrete also decreases obviously with the increase of waste rubber content and compressive strength decreases by 46.5% when the content is 30%; compared with ordinary concrete, the freeze-thaw resistance of concrete with waste rubber powder is obviously improved; thermal conductivity of concrete with waste rubber is only 13% of ordinary concrete, and the concrete with less than 20% wt. of waste rubber has low water absorption and good water resistance.
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