摘要
通过修正硅酸盐水泥的水化动力学模型(Tomosawa模型,T模型),结合温度变化与水化热的关系,提出了混凝土绝热温升的增量公式,并应用该增量公式对3种不同初始温度下混凝土的绝热温升进行数值模拟。研究结果表明,混凝土的绝热温升呈现出早期温度迅速增大后期温度保持稳定的趋势,提高初始温度会缩短绝热温升达到稳定的时间,但不会影响绝热温升的总体变化趋势。增量公式的模拟计算结果与试验结果较为吻合,说明该增量公式能有效地模拟混凝土的绝热温升。
An increment formula of adiabatic temperature rise of concrete has been proposed by modifying the hydration kinetics model （Tomosawa model, T model） for Portland cement and combing with the relationship between variation of temperature and heat of hydration. Then the increment formula was applied to simulate the adiabatic temperature rise of concrete at three different initial temperatures. The results show that the adiabatic temperature rise will increase significantly at earlier ages and increase slightly at later ages,and this trend will not change with different initial temperature. However,the time of adiabatic temperature rise reaching to the steady level will advance as increasing the initial temperature. The formula calculation results agree well with the experimental results, and that demonstrate that the increment formula is quite effective in numerical simulation for the adiabatic temperature rise of concrete.
出处
《水利学报》
EI
CSCD
北大核心
2014年第5期626-630,共5页
Journal of Hydraulic Engineering
基金
国家重点基础研究发展计划(973)项目(2009CB623105)
关键词
混凝土
绝热温升
增量公式
concrete
adiabatic temperature rise
increment formula
