Abstract
Added rubber powder made from recycled tires in cement concrete can reduce pollution and benefit a developing circular economy. To determine what particle size and dosage of rubber powder is best in road concrete, 24 groups of rubber powder concrete were prepared using four particle sizes and six kinds of dosages. Characteristics such as strength, toughness, crack resistance, frost resistance, and permeability were measured to determine pavement performance. The results showed that the strength of rubber powder concrete decreased with dosage and increasing degree of fineness, and it had a higher sensitivity for dosage. Adding rubber powder to concrete has a positive effect to improve toughness, crack resistance, and permeability of concrete, and the effect is more obvious when increasing dosage. However, the ability of frost resistance increased at first, and then decreased, when dosage increased. The optimum dosage for 60, 80, 100 and 120 meshes rubber powder was 15%.
Published Version
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