Abstract
This study was conducted to investigate the effects of the sand gradation and cement fineness on cement asphalt mortar (CA mortar) for application to CA mortar in Korea. The CA mortar was prepared using three combined gradations of sand (CG1, CG2, and CG3) and three types of cement (C1, C2, and C3). The following basic properties of the CA mortar were analyzed: temperature of the mortar, flow value, air content, separation ratio, compressive strength, and expansion ratio. The test results showed that the separation ratio of the CA mortar increased and the flowability and compressive strength of the CA mortar decreased when the maximum sand size and gradation increased. The compressive strength of the CA mortar prepared with early hardening cement was higher than that of the CA mortar prepared with normal Portland cement. The temperature and expansion ratio of the CA mortar showed no significant relationship with the sand gradation or cement type.
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