Investigation of the Freezing/Melting Process of Unsaturated Cement Paste by Low Temperature Calorimetry
Low temperature calorimetry (LTC) is usually applied to characterize the porosity of cement-based materials with a total water saturated state. By recording the heat flow of the sample at different testing temperatures, the ice content in the freezing and the melting process can be analyzed. In order to investigate the state of the water during the freezing/melting process of unsaturated porous materials, different from previous study, cement pastes of different moisture content are utilized and tested by LTC test. It is found that the nucleation temperature is independent of the degree of saturation in the range of 87%–100%, while the influence of the degree of saturation on the melting process is significant. For the melting process, the trough temperature increases with the decreasing degree of saturation, and water movement takes place in unsaturated samples during a freezing/melting cycle.
Ruihu Zhu Lin Liu Huisu Chen
College of Harbour Coastal and Offshore Engineering, Hohai University College of Civil and Transportation Engineering, Hohai University Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering,Southe
国际会议
The 5th International Conference on the Durability of Concrete Structures(第五届混凝土结构耐久性国际学术会议)
深圳
英文
181-185
2016-07-01（万方平台首次上网日期，不代表论文的发表时间）