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http://dx.doi.org/10.5345/JKIBC.2012.12.5.460

Hydration Analysis of Fine Particle and Old Mortar Attached on the Surface of Recycled Aggregate  

Ko, Dong-Woo (Department of Architectural Engineering, Jeju National University)
Choi, Hee-Bok (Department of Architectural Engineering, Jeju National University)
Publication Information
Journal of the Korea Institute of Building Construction / v.12, no.5, 2012 , pp. 460-467 More about this Journal
Abstract
When recycled aggregate with old mortar and particles is used in concrete mixing, such aggregates can affect hydration reaction by promoting or inhibiting it. In this study, the possibility of hydration reaction on old mortar and particle was analyzed. Hydration reaction was carried out in old mortar that is finely crushed by an impact machine in the production of recycled aggregates, and it was found that this did have an impact on the strength development of concrete. Unlike in old cement, the hydration reaction did not progress in the particles, and it had high amounts of silica powder and calcium carbonate. In conclusion, the old mortar can have the influence of improving compressive strength, but the particles can delay the setting time of recycled aggregate concrete.
Keywords
recycled aggregate; old mortar; fine grained; hydration; differential scanning calorimetry;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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