• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Magazine of Concrete Research >Creep at early ages of ultrahigh-strength concrete: experiment and modelling
【24h】

Creep at early ages of ultrahigh-strength concrete: experiment and modelling

机译：超高强度混凝土的早期蠕变：实验和建模

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

Ultrahigh-strength concrete (UHSC) is a promising material for engineering applications, owing to the rapid increase of compressive strength at early ages. In this study, the creep behaviour of UHSC with an ultralow water/binder ratio (= 0.16) under loading at early ages was investigated. The influence factors of loading age (1, 2, 3 and 7 d), normal coarse aggregate and steel fibre content (0, 1 and 2%) were taken into consideration. Experiment results showed that the addition of coarse aggregates and ultrafine steel fibres were obviously effective in decreasing the creep deformation of UHSC but that the specific creep of UHSC with 2% steel fibres was higher than that of UHSC with 1% steel fibres. Specimens loaded at earlier ages had higher creep. At a microscopic level, it could be seen that the creep of UHSC was influenced by hydration products and concrete internal defects. From a macroscopic perspective, it could be seen that this was the result of a combination of strength and elastic modulus development factors. By introducing a coordination factor for the development of strength and elastic modulus, a modified creep model was proposed to predict the creep of UHSC.
机译：由于早年抗压强度的迅速提高，超高强度混凝土（UHSC）是一种有前途的工程应用材料。在这项研究中，研究了在早期载荷下具有超低水/粘结剂比（= 0.16）的UHSC的蠕变行为。考虑了加载时间（1、2、3和7 d），正常粗骨料和钢纤维含量（0、1和2％）的影响因素。实验结果表明，粗骨料和超细钢纤维的添加对降低UHSC的蠕变变形具有明显的效果，但含2％钢纤维的UHSC的比蠕变高于含1％钢纤维的UHSC的比蠕变。在较早的年龄加载的标本具有较高的蠕变。从微观上看，UHSC的蠕变受水合产物和混凝土内部缺陷的影响。从宏观的角度来看，可以看出这是强度和弹性模量发展因素结合的结果。通过引入强度和弹性模量发展的协调因子，提出了一种改进的蠕变模型来预测UHSC的蠕变。

著录项

  • 来源
    《Magazine of Concrete Research》 |2019年第16期|847-859|共13页
  • 作者

    Xu Yi; Liu Jiaping; Liu Jianzhong; Zhang Qianqian; Zhao Hualei;

  • 作者单位

    Southeast Univ, Sch Mat Sci & Engn, Nanjing, Jiangsu, Peoples R China|Hohai Univ, Coll Mech & Mat, Nanjing, Jiangsu, Peoples R China;

    Southeast Univ, Sch Mat Sci & Engn, Nanjing, Jiangsu, Peoples R China|Jiangsu Res Inst Bldg Sci, State Key Lab High Performance Civil Engn Mat, Nanjing, Jiangsu, Peoples R China;

    Jiangsu Res Inst Bldg Sci, State Key Lab High Performance Civil Engn Mat, Nanjing, Jiangsu, Peoples R China|Sobute New Mat Co Ltd, Jiangsu Res Inst Bldg Sci, Nanjing, Jiangsu, Peoples R China;

    Jiangsu Res Inst Bldg Sci, State Key Lab High Performance Civil Engn Mat, Nanjing, Jiangsu, Peoples R China;

    Jiangsu Res Inst Bldg Sci, State Key Lab High Performance Civil Engn Mat, Nanjing, Jiangsu, Peoples R China|Jinan Univ, Sch Math Sci, Jinan, Shandong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    creep; fibre-reinforced concrete; modulus of elasticity;

    机译：蠕变;纤维混凝土;弹性模量;

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