| abstract |
[PROBLEMS] A combination with other admixtures is inexpensive, inexpensive, suppresses strength reduction of hardened concrete, suppresses cracking of hardened concrete with excellent shrinkage reduction function, and has excellent freeze-thaw resistance. A shrinkage reducing agent for hydraulic material that can be imparted with water is provided. The shrinkage reducing agent for hydraulic material according to the present invention is a shrinkage for hydraulic material containing one or more polyoxyalkylene compounds (A) selected from polyethylene glycol, polypropylene glycol, and polyethylene / polypropylene glycol as essential components. A bubble spacing coefficient of concrete or mortar using the shrinkage reducing agent for hydraulic material, which is a reducing agent, is 350 μm or less. [Selection] Figure 1 |