Method of manufacturing concrete for preventing frost damage

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of an anti-freezing damage concrete capable of mixing a predetermined amount of hollow fine balls into the concrete simply and safely, as well as reducing charging time by charging a water-soluble paper bag including the hollow fine balls into the concrete at a predetermined timing.SOLUTION: A manufacturing method of an anti-freezing damage concrete comprises post-adding a bag body including the hollow fine balls into a pre-kneaded concrete; and further kneading the concrete, in which the bag body is made of water-soluble paper. The manufacturing method of an anti-freezing damage concrete uses the water soluble paper having a wood pulp content of 75 - 95%. The manufacturing method of an anti-freezing damage concrete uses the hollow fine balls made of a polyvinylidene chloride resin.SELECTED DRAWING: None