CaO-MgO-SiO₂系材料を大量使用しオートクレーブ養生を施したセメント系材料におけるトバモライト生成機構に関する検討

抄録

Nowadays, high-durability has been required in concrete structures that assume long term-service. Therefore, generation of tobermorite in the concrete has been important for the material design of high durability concrete. The purpose of this research is to evaluate the effect of the addition of high volume CaO-MgO-SiO₂-based materials with autoclave curing for the generation of tobermorite, and to clarify the generation mechanism of tobermorite from the view point of the hydration reaction of materials at heating process in autoclave curing. As a result, generation of tobermorite was increased by using high volume CaO-MgO-SiO₂-based materials. It is because that C-S-H with high CaO/SiO₂ ratio was maintained, since the reaction of the α-quartz at heating process in autoclave curing was suppressed by substitution of CaO-MgO-SiO₂-based materials.