| Title |
Characteristics of Temperature Record in Concrete According to the Use of Gang Form with Application of Polyurethane Form to Cold Climate |
| Authors |
Nam, Kyung-Yong ; Kang, In-Seon ; Lee, Jong-Kyoon ; Lee, Young-Do ; Jung, Sang-Jin ; Won, Joon-Yuen |
| Keywords |
Insulation Gang-form ; Cold Weather Concreting ; Temperature Record ; Maturity |
| Abstract |
This study is analyzing a member kind after placing concrete, the location-based temperature record, and the strength development, by making insulation gang-form with application of polyurethane form to general gang-form for securing efficient concrete quality in the condition of cold weather. According to our experimental results, the member of general gang-form with curing in the same condition as the actual field didn't drop to under 3℃ until before 24 hours in the early part, but fell to under 0℃ from 36 hours later because a large rise in temperature caused by hydration reaction didn't occur. On the other hand, in case of insulation gang-form, the temperature on the surface and the central part didn't go down to under 3℃ before 12 hours in the early part and didn't fall to under it even until 72 hours after it while the peak temperature went up to 12℃. Thus, it could be known to definitely have excellent insulation effect compared to space heating curing, which is generally performed on the spot. In comparison with space heating curing whose error in curing temperature is big every field, it is judged to likely have great effect on improvement in concrete quality given the work construction in cold weather and on early demolding in a cast during winter. |