检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100
出 处:《人民长江》2016年第7期97-101,共5页Yangtze River
基 金:国家"十一五"科技支撑计划重点项目(2006BAD-11B03)
摘 要:混凝土绝热温升与混凝土的龄期、水胶比、粉煤灰掺量和温度等多种因素有关,目前缺乏综合考虑这些影响因素的混凝土绝热温升计算模型。通过对不同水胶比、粉煤灰掺量和入模温度条件下的混凝土开展绝热温升试验,分析了诸因素对混凝土绝热温升和温升速率的影响,提出了新的计算模型,并确定了特征参数及验证了模型的准确性。结果表明,新模型能采用统一的函数来描述不同配合比和温度历程下的混凝土绝热温升过程,且与混凝土绝热温升试验的实测数据吻合较好,可以较精确地预测混凝土结构温度变化,具有一定的实用价值。The adiabatic temperature rise of concrete depends on the age of concrete,water-binder ratio,fly ash content and temperature; however there is a dearth of adiabatic temperature rise calculation model that could consider all these factors.A series of experiments with different initial conditions,namely different water-binder ratio,fly ash content and pouring temperature,were carried out,and the influences of all these factors on adiabatic temperature rise and temperature rise rate are discussed.A new method is given for adiabatic temperature rise calculation that takes into account of the four factors,the characteristic factors are determined and the presented model is verified.It indicates that the presented model can describe the adiabatic temperature under different proportion ratio and thermal history with a uniform function,and the calculated values are in agreement with experiment data,so it could predict the temperature variation of structures accurately.
分 类 号:TV431[水利工程—水工结构工程]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.200