| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete curing sheet avoiding the danger of a fire accident and oxygen deficiency, facilitating execution and monitoring, suppressing energy consumption, and preventing environmental deterioration in the heat curing for preventing the freezing of the placed concrete in the low-temperature environment at a cold district. SOLUTION: Vent holes are bored on one or both of two water-nonpermeable sheets, and an exothermic agent generating heat via air inflow is enclosed between two water-nonpermeable sheets to form this curing sheet. The exothermic agent is made of iron powder and a reaction auxiliary, the mixing ratio of the iron powder is set to 40-70 mass %, and the ventilation quantity of the vent holes is preferably adjusted according to the mixing ratio and the grain size of the iron powder. The exothermic agent is preferably enclosed dividedly. The curing sheet is removably fitted to the opposite face of this concrete placing form so that the side bored with the vent holes is located on the outside. |
