| 摘要 |
Disclosed herein is an anti-freezing composition for concrete with high early strength. More specifically, the present invention relates an anti-freezing composition for concrete which prevents frost damage at early ages, provides an improved strength, and is environment -friendly by applying a liquid composition which comprises alkali metal or alkaline earth metal formate or acetate, chitosan, and water to cold weather concrete. The present inventors have found that, when alkali metal or alkali earth metal formates or acetates are properly combined and the combination is applied to a concrete, the concrete shows not only an anti-freezing property but also a high early strength property. Further, the present inventors have found that potassium acetate or potassium formate plays an important role in ant i -freezing, calcium formate is important for a high early strength, and the addition of chitosan is needed to prevent the salts from recrystallization and increase stability during storage. Thus, the concrete which comprises the combination of said components shows an improved anti-freezing and high early strength property. Further, the composition can further comprise calcium formate, potassium silicate, etc. as an essential component, and a fluidizer, a corrosion inhibitor, a pH controller, etc. as an additional component. |
