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A comparative study of the bond strength of reinforcing steel in high-volume fly ash concrete and conventional concrete

机译：高掺量粉煤灰混凝土与常规混凝土中钢筋粘结强度的比较研究。

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摘要

The production of Portland cement - the key ingredient in concrete - generates a significant amount of carbon dioxide. However, due to its incredible versatility, availability, and relatively low cost, concrete is the most consumed manmade material on the planet. One method of reducing concrete's contribution to greenhouse gas emissions is the use of fly ash to replace a significant amount of the cement. An experimental investigation was conducted to compare the bond strength of reinforcing steel in high-volume fly ash concrete (HVFAC) - concrete with at least 50% of the cement replaced with fly ash - with conventional concrete (CC). This experimental program consisted of 12 pull-out specimens as well as 12 full-scale beams (three unconfined and three confined by transverse reinforcement for each concrete type). The pull-out specimens were based on RILEM recommendations, and the beam specimens were tested under a simply supported four-point loading condition. The CC test results served as a control and were used to evaluate the results from the HVFAC pull-out and beam specimen tests. Furthermore, a comparison was performed between results of this study and a bond database of CC specimens. These comparisons indicate that HVFAC beams possess comparable bond strength as CC beams.
机译：波特兰水泥（混凝土中的关键成分）的生产会产生大量的二氧化碳。但是，由于其不可思议的多功能性，可用性和相对较低的成本，混凝土是地球上消耗最多的人造材料。减少混凝土对温室气体排放的影响的一种方法是使用粉煤灰代替大量的水泥。进行了一项实验研究，以比较高体积粉煤灰混凝土（HVFAC）中的钢筋粘结强度-至少50％的水泥被粉煤灰代替的混凝土-与常规混凝土（CC）。该实验程序包括12个拉出试样以及12个全尺寸梁（每种混凝土类型分别为3个无侧限和3个由横向钢筋限制）。拔出的样本基于RILEM的建议，并且在简单支撑的四点载荷条件下对梁样本进行了测试。 CC测试结果作为对照，用于评估HVFAC拔出和梁样本测试的结果。此外，在这项研究的结果和CC标本的债券数据库之间进行了比较。这些比较表明，HVFAC梁具有与CC梁相当的粘结强度。

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  • 来源
    《Construction and Building Materials》 |2013年第3期|919-924|共6页
  • 作者

    Mahdi Arezoumandi; Michael H. Wolfe; Jeffery S. Volz;

  • 作者单位

    Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 302 Engineering Research Lab, 500 W. 16th Street, Rolla, MO 65409, United States;

    Arkansas State Highway and Transportation Department, 10324 Interstate 30, Little Rock, AR 72209, United States;

    Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, 331 Butler Carlton Hall, 1401 N. Pine Street, Rolla,MO 65409, United States;

  • 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

    high-volume fly ash concrete; conventional concrete; bond strength; experimental study;

    机译：高掺量粉煤灰混凝土;常规混凝土粘结强度;实验研究;

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