| abstract |
PROBLEM TO BE SOLVED: To provide a technology for producing a highly durable concrete which solves the problems of cracking and white flower of concrete, improves strength, improves acid resistance, seawater resistance and weather resistance, and prevents neutralization. SOLUTION: After the hardened concrete exhibits a predetermined strength, a step of removing moisture in the concrete by a freeze-drying method and drying, the moisture is removed by bringing the concrete into contact with a gas that reacts with cement hydrate. A method for producing a highly durable concrete, comprising a step of forming a reaction product in a void and / or a step of filling ultrafine particles in a void after gas contact, and the highly durable concrete. [Selection figure] None |