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Material Characteristics of Rapid Hardening Cement Paste Using Phase Change Material for Semi-rigid Pavement
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 Title & Authors
Material Characteristics of Rapid Hardening Cement Paste Using Phase Change Material for Semi-rigid Pavement
Kim, Seung-Su; Lee, Byung-Jae; Bang, Jin-Wook; Kim, Yun-Yong;
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A study to apply phase change material(PCM) to rapid hardening cement paste forming semi-rigid pavement was carried out. The characteristics fresh and hardened paste were evaluated through the experiment for a total of 6 mixtures according to the cement type and the substitution of phase change material for acrylate. The fluidity by substituting phase change material for acrylate satisfied the target flow time of 10 to 13 seconds. In case of setting time, it was possible to secure the performance of rapid hardening cement by substituting phase change material, and if the substitution ratio over 60%, the initial set occurred 1 to 2 minutes faster than other mixtures. In case of compressive strength and bond strength, it showed similar strength characteristics with the plain mixture, and it satisfied both the target compressive and bonding strength of 36MPa and 2MPa. The mixture substituting phase change material showed higher resistance to chloride ion penetration than the mixture only using acrylate and the OPC level was insufficient. From the results of physical and mechanical performances of semi-rigid pavement cement paste, the phase change material substitution rate of 20% was effective in the range of this study.
Ultra rapid hardening cement;Grout;Phase change material;Hydration heat control;
 Cited by
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