摘要
采用差分水化量热仪研究了恒温((25±0.3)℃)低水胶比(W/B=0.30)条件下,纯水泥、水泥-硅灰、水泥-粉煤灰二元胶凝材料体系和水泥-硅灰-粉煤灰三元胶凝材料体系的水化放热特性。试验结果表明:相对于纯水泥,水泥-硅灰二元体系的水化诱导期延长,第二水化放热峰放热速率增加,水化减速期的总放热量减小;水泥-粉煤灰二元体系的水化诱导期显著延长,水化减速期后期的放热速率增大,整个水化历程的总放热量减小;水泥-硅灰-粉煤灰三元体系的水化诱导期显著延长,整个水化历程的水化放热速率降低,总放热量减小。
This paper tests hydration heat evolution process of the pure cement, the cement - silica fume binary system, the cement - fly ash binary system and the cement - silica fume - fly ash ternary system under isothermal（ （25 ＋ 0.3）℃ ） and low water to binder ratio（ W/B =0.30） condition using differential calorimeter. Test results indicate that compared with the hydration heat evolution process of pure cement, the cement - silica fume binary system can elongate the domant period, increase the exothermic rate of the second hydration heat evolution peak and reduce the accumulative heat during the deceleration period; the cement - fly ash binary system can elongate the dormant period significantly, increase the exothermic rate during the later age of deceleration period, and reduce the accumulative heat during the total hydration heat evolution process; cement - silica fume- fly ash ternary system can elongate the dormant period even more significantly, and lower the exothermic rate and accumulative heat during the total hydration heat evolution process.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2006年第1期70-74,共5页
Journal of Railway Science and Engineering
基金
西部交通建设科技项目(200131822370-(4))
关键词
水泥
硅灰
粉煤灰
水化热
cement
silica fume
fly ash
hydration heat
