補修・補強（材料）(3)

[V-125] Study on fresh and mechanical properties of non-shrink mortar under high temperature

〇Yuki Takaura¹, Takeshi Torichigai¹ (1.kajima construction)

Keywords:non-shrink mortar, grout, temperature, J14, Setting time, expansion rate

Because of climate change which is mainly due to greenhouse gases, the construction environment for hot concrete has become severe. According to the Concrete Standard Specification Book, "If the driving temperature exceeds 35℃, it must be confirmed that the concrete can maintain the specified quality." However, the same can be said for various repair materials. In this study, we evaluated the fresh and Curing properties of non-shrink mortar under the environment of 50℃,and conducted verification experiments As a result, it was found that by adding an appropriate amount of the retarder, the pot life can be secured for about 1 hour while ensuring the performance of Curing properties.