...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Construction and Building Materials >Direct tensile strength of lightweight concrete with different specimen depths and aggregate sizes
【24h】

Direct tensile strength of lightweight concrete with different specimen depths and aggregate sizes

机译：不同试样深度和集料尺寸的轻质混凝土的直接拉伸强度

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

To examine the size effect in direct tension, 8 ready-mixed concrete batches classified into all-lightweight i concrete (ALWC) and sand-lightweight concrete (SLWC) groups were prepared. In each group, the maximum aggregate size varied between 4 mm and 19 mm, and then the lateral depth of specimen with rectangular section ranged from 100 mm to 500 mm in each concrete batch. The size effect curves based on the basic formulas proposed by Bazant(1984) , Kim and Eo (1990) , and Yang and Sim (2011) were also determined using a total of 28 lightweight concrete (LWC) data of current tests and 114 normal-weight concrete (NWC) data compiled from the available literature (Carpinteri and Ferro, 1994; Hu, 2011) , though specimens with lateral depth beside 100 mm is very insufficient even in NWC. The present experimental observations and verifications by prediction models clearly showed that the size effect is more notable with the decrease of the unit weight of concrete and it is stronger in direct tension than in compression. The validity of Bazant's model (Bazant, 1984) is significantly dependent on the maximum aggregate size, while the models proposed by Kim and Eo (1990) and Yang and Sim (2011) closely predict the size effect trend observed from test data, confirming that the influence of the maximum aggregate size on the concrete tensile strength and the size effect is negligible, especially for LWC.
机译：为了检查直接拉伸时的尺寸效应，准备了8个预拌混凝土批次，分别分为全轻质混凝土（ALWC）和轻质混凝土（SLWC）组。在每组中，最大骨料尺寸在4毫米至19毫米之间变化，然后每批混凝土中矩形截面的试样的横向深度在100毫米至500毫米之间。根据Bazant（1984），Kim和Eo（1990）以及Yang和Sim（2011）提出的基本公式得出的尺寸效应曲线还使用了当前测试的总共28个轻质混凝土（LWC）数据和114个标准从现有文献（Carpinteri和Ferro，1994； Hu，2011）中收集的重混凝土（NWC）数据，即使在NWC中，横向深度在100 mm旁边的试样也非常不足。目前的实验观察和预测模型的验证清楚地表明，随着混凝土单位重量的减小，尺寸效应更加显着，直接拉伸比压缩更强。 Bazant模型（Bazant，1984）的有效性很大程度上取决于最大骨料的大小，而Kim和Eo（1990）以及Yang和Sim（2011）提出的模型则密切预测了从测试数据中观察到的大小效应趋势，证实了最大骨料尺寸对混凝土抗拉强度和尺寸效应的影响可以忽略不计，尤其是对于轻质混凝土。

著录项

  • 来源
    《Construction and Building Materials》 |2014年第30期|132-141|共10页
  • 作者

    Se-Jin Choi; Keun-Hyeok Yang; Jae-Il Sim; Byong-Jeong Choi;

  • 作者单位

    Building Structure & Materials Research Department, Research Institute of Industrial Science & Technology, Incheon, Republic of Korea;

    Department of Plant Architectural Engineering, Kyonggi University, Kyonggi-do, Republic of Korea;

    Department of Architectural Engineering, Kyonggi University, Seoul, Republic of Korea;

    Department of Plant Architectural Engineering, Kyonggi University, Kyonggi-do, Republic of Korea;

  • 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

    Lightweight concrete; Size effect; Direct tension; Aggregate size; Concrete unit weight;

    机译：轻质混凝土;尺寸效果;直接张力;骨料尺寸具体单位重量;

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