Frost damage inhibitor for concrete and concrete

摘要

PROBLEM TO BE SOLVED: To provide a concrete durability improver capable of suppressing a decrease in freeze-thaw resistance of concrete and having a high shrinkage reducing effect even when the concrete includes a shrinkage reducing agent.;SOLUTION: A concrete durability improver of this invention includes at least a shrinkage reducing agent, a paraffin, and a nitrite salt. It is preferable that the shrinkage reducing agent and the nitrite salt exist in a water-soluble state; the paraffin exists in a water-dispersed state; and that the concrete durability improver comprises 2-250 pts.mass of paraffin and 2-250 pts.mass of nitrite salt relative to 100 pts.mass of the shrinkage reducing agent.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT