| Title |
Temperature Record and Strength Development from using Gang-form Adhered to Polyisocyanurate Board |
| Authors |
Nam, Kyung-Yong ; Won, Joon-Yuen ; Chun, Jae-Youl ; Jung, Sang-Jin |
| Keywords |
Polyisocyanurate Board ; Insulation Gang-form ; Cold Weather Concrete ; Temperature Record ; Maturity |
| Abstract |
This paper has fabricated insulation gang-form adhering general gang-form to the polyisocyanurate board and analyzed type of members, temperature record by locations and strength development after placing the concrete, in order to ensure efficient concrete quality under cold weather. According to our test, we can see that general gang-form member with curing under the same conditions as the actual field has a trend of constantly decreasing concrete temperature regardless to surface or central area due to rapid outdoor air temperature reduction, while in the case of insulation gang-from I and II, temperature increased up to around 25℃ after 12 hours under rapid outdoor air temperature change and temperature distribution did not appear large separation according to hydration reaction measurement locations. In addition, results of measurement for temperature records on weak insulation area by types of gang-forms showed that the temperature record distribution on the form tie surface and horizontal bar surface of angle bar has generally similar trend as the temperature records on the surface of the insulation gang-form, while corner area of the insulation gang-form did not have large insulation effect. It is determined that it requires additional curing measure for the weak corner area of the insulation gang-form in the future. |