本文選題：熱分析　切入點：熱應變　出處：《硅酸鹽學報》2015年05期

【摘要】：混凝土因在低溫環(huán)境下具有優(yōu)越的力學性能和耐久性,已被應用于液化天然氣儲藏塔外部保護層或內部接觸層。但混凝土在低溫環(huán)境下的熱變形是一個復雜的過程�；谝郧把芯空咚盟嗷牧铣蜏責嵝巫兒暧^結果,采用差示掃描量熱技術研究不同水灰比水飽和硬化水泥石中孔溶液的冰點,以解釋熱形變機理。結果表明:直徑小于8 nm的孔中溶液的結冰對水泥基材料低溫膨脹起主導作用;當環(huán)境最低溫度低于 50℃時,水泥基材料熱應變的變化和損失隨水灰比增大逐漸明顯。
[Abstract]:Because of its superior mechanical properties and durability in low temperature environment, The thermal deformation of concrete in low temperature environment is a complicated process. Based on the macroscopic results of ultra low temperature thermal deformation of cement based materials obtained by previous researchers, it has been applied to the external protective layer or internal contact layer of liquefied natural gas storage tower. Differential scanning calorimetry (DSC) was used to study the freezing point of pore solution in water-saturated hardened cement stone with different water-cement ratio to explain the mechanism of thermal deformation. The results show that the freezing of pore solution with diameter less than 8 nm plays a leading role in the low temperature expansion of cement-based material. When the minimum ambient temperature is lower than 50 鈩，

本文編號：1678506