Ice Formation in Hardened Cement Paste—1. Mature Water-Saturated Pastes

摘要: Ice formation in mature, water saturated hardened cement pastes (water/ ration (W/C) from 0.4 to 0.7) has been measured using the Calvet microcalorimeter. The specimen size was about 11 cm 3 . major results are:(a) little ice forms below -55°C; (b) rate of is not a monotone function temperature, but contains three well defined peaks centered around -8, -23, and -40°C. relative magnitude W/C-ratio; (c) melting takes place continuously -55°C, by far part melts close 0°C; (d) frozen evaporable varies 20 percent (W/C = 0.40) 57 ( W/C 0.70); (e) cooling (in range 1.7 13.3°C/h) relatively influence on amount formed at given temperature; (f) pore system.