| 摘要: |
| 对4种类型的水泥基材料进行绝热温升试验，提出绝热温升各阶段分界点的确定方法，分析各阶段持续时间和温升速率大小等规律，并对已有的最终温升预测方法进行修正.最后在分析不同类型水泥基材料绝热温升规律的基础上，提出一种通用的水泥基材料绝热温升速率表达式，用于描述绝热温升速率随龄期的变化.所提出的表达式形式简单，各参数具有较为明确的物理意义，与已有模型的表达式相比，在对早龄期绝热温升和温升速率的描述方面具有更好的效果. |
| 关键词: 水泥基材料 绝热温升 混凝土水化 温升速率 |
| DOI：103969/jissn1007 9629201405020 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51278124） |
|
| Characteristics of Adiabatic Temperature Rise Curve and Expressions of Adiabatic Temperature Rise Rate of Cement Based Materials |
|
WANG Guojie, ZHENG Jianlan
|
|
School of Engineering, Fujian Jiangxia University, Fuzhou 350108, China
|
| Abstract: |
| Adiabatic tests of several cement based materials were conducted. According to the measured temperature rise, curves of adiabatic temperature rise rate versus age, “time divided by the temperature rise” versus age are obtained. Methods to define the end moment of dormant stage and the onset moment of decay stage are presented. Modified method to predict the final temperature rise is developed according to the test results. A new expression is proposed to simulate the adiabatic temperature rise. The results show that the presented expression is simple in form, and has clear physical meaning of parameters. Compared with the expressions of existing models, it is good at the simulation in the early age. Both methods and the expressions are applicable to all cement based materials. |
| Key words: cement based material adiabatic temperature rise hydration of concrete temperature rise rate |
