• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Materials Technology and Energy >Determination of Temperature Rise and Temperature Differentials of CEMII/B-V Cement for 20MPa Mass Concrete using Adiabatic Temperature Rise Data
【24h】

Determination of Temperature Rise and Temperature Differentials of CEMII/B-V Cement for 20MPa Mass Concrete using Adiabatic Temperature Rise Data

机译：使用绝热升高数据测定20MPA质量混凝土的CEMII / B-V水泥温度升高

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Experimental test was carried out to determine the temperature rise characteristics of Portland-Fly-Ash Cement (CEM II/B-V, 42.5N) of Blaine fineness 418.6m~2/kg and 444.6m~2/kg respectively for 20MPa mass concrete under adiabatic condition. The estimation on adiabatic temperature rise by way of CIRIA C660 method (Construction Industry Research & Information Information) was adopted to verify and validate the hot-box test results by simulating the heat generation curve of the concrete under semi-adiabatic condition. Test result found that Portland fly-ash cement has exhibited decrease in the peak value of temperature rise and maximum temperature rise rate. The result showed that the temperature development and distribution profile, which is directly contributed from the heat of hydration of cement with time, is affected by the insulation, initial placing temperature, geometry and size of concrete mass. The mock up data showing the measured temperature differential is significantly lower than the technical specifications 20°C temperature differential requirement and the 27.7°C limiting temperature differential for granite aggregate concrete as stipulated in BS8110-2: 1985. The concrete strength test result revealed that the 28 days cubes compressive strength was above the stipulated 20MPa characteristic strength at 90 days. The test demonstrated that with proper concrete mix design, the use of Portland flyash cement, combination of chilled water and flake ice, and good insulation is effective in reducing peak temperature rise, temperature differential, and lower adiabatic temperature rise for mass concrete pours. As far as the determined adiabatic temperature rise result was concern, the established result could be inferred for in-situ thermal properties of 20MPa mass concrete application, as the result could be repeatable on account of similar type of constituent materials and concrete mix design adopted for permanent works at project site.
机译：进行实验试验，以确定Blaine粉氨酸水泥（CEM II / BV，42.5N）的温度升高特性418.6m〜2 / kg和444.6m〜2 / kg，在绝热下的20MPa质量混凝土健康）状况。通过CiRIA C660方法（建筑行业研究和信息信息）通过模拟半绝热条件下混凝土的发热曲线来验证和验证热箱测试结果的绝热温度升高。测试结果发现，波特兰粉煤灰水泥在温度升高和最高温度上升速率下表现出降低。结果表明，温度开发和分布型材直接从水泥水合水中随时间贡献，受到绝缘，初始放置温度，混凝土质量的几何形状和尺寸的影响。显示测量温差的嘲弄数据显着低于技术规格20°C温差要求，27.7°C限制花岗岩骨料混凝土温度差异，如BS8110-2：1985所示。具体的强度试验结果显示在90天的情况下，28天立方体抗压强度高于规定的20MPa特征强度。该试验表明，采用适当的混凝土混合设计，使用波特兰粉煤泥水泥，冷却水和片冰的组合，以及良好的绝缘在降低峰值温升，温差和较低的绝热温度升高时有效。就确定的绝热升高结果是关注的，可以推断成立的结果，以便原位热性能为20MPA大量混凝土应用，因为由于类似类型的组成材料和采用混凝土混合设计，因此可以是可重复的。在项目网站的永久工作。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号