...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >The characteristics of air void and frost resistance of RCC with fly ash and expansive agent
【24h】

The characteristics of air void and frost resistance of RCC with fly ash and expansive agent

机译：粉煤灰和膨胀剂对碾压混凝土的气孔和防冻特性。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In order to assure the outer concrete of Longtan dam in China possesses excellent of frost resistance, the losses of strength, mass and air void characteristics of roller compacted concrete (RCC) containing fly ash, superplasticizer and a novel MgO-bearing expansive agent (HNM) were studied using the freezing-thawing method ASTM C666. The results show that there is a linear correlation between strength and mass losses in RCC subjected to cycles of freezing and thawing. There is a relationship between the air void spacing factor and the frost resistance of RCC. However, for RCC containing fly ash and superplasticizer a spacing factor of 0.25 mm is not necessary. Using a waterbinder ratio of 0.48 in RCC containing 50 percent fly ash and 8 percent HNM a durability factor of over -D300 can be achieved provided the spacing factor is less than 0.4 mm.
机译：为了确保中国龙滩大坝的外部混凝土具有优异的抗冻性，粉煤灰，高效减水剂和新型含MgO的膨胀剂（HNM）的碾压混凝土（RCC）的强度，质量和气隙损失）是使用ASTM C666冻融法研究的。结果表明，在经历冻融循环的RCC中，强度与质量损失之间存在线性关系。空隙间距因子与RCC的抗冻性之间存在关系。但是，对于包含粉煤灰和高效减水剂的RCC，则不需要0.25 mm的间距系数。在包含50％的粉煤灰和8％的HNM的RCC中使用0.48的水结合剂比率时，如果间距系数小于0.4 mm，则可以达到超过-D300的耐久性。

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