Abstract
This study evaluated the effects of two types of cationic modified asphalt emulsions, i.e. SBS modified asphalt emulsion and SBR modified asphalt emulsion, on the flow time, air content and mechanical properties of cement emulsified asphalt mortar (CEAM) at varying asphalt to cement (A/C) ratios. The flow time and air content of fresh CEAM were measured, and the compressive strength, elastic modulus and impact toughness of hardened CEAM were tested. The experimental results show that the flow time, air content and toughness increase with the increase of A/C ratio, while the compressive strength and 28d elastic modulus show a different trend. The effects of modifiers on the properties of CEAM are different. The flow time, air content and toughness increase with the SBS content, while the compressive strength and 28d elastic modulus show the opposite trend. Contrary to the toughness, the flow time, air content, compressive strength and 28d elastic modulus decrease with the SBR content.
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