冷却媒体としてドライアイスを用いたプレクーリング工法について
1993 年 3 巻 9 号 p. 41-50
詳細
1993 年 3 巻 9 号 p. 41-50
Recently, thermal cracks due to the heat of hydration for massive concrete structures have become controversial problems in response to the requirements of high durability. Several measures have been raised in order to control such thermal cracks such as precooling method, postcooling method, modification of concrete proportions, etc. Especially, precooling method is thought to be the most effective way to decrease thermal stresses in the concrete structures. The authors have initiated the fundamental research on precooling method with Dry Ice. And a prototype test was conducted in order to verify the cooling efficiency, manufacturing efficiency of cooled concrete, concrete strengths and concrete neutralization degrees when using an actual batching plant. This paper discribes the results of the prototype test of this precooling method, which show that this method is feasible and reliable.
