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The effects of waste concrete properties on recycled aggregate concrete properties

机译：废弃混凝土性能对再生骨料混凝土性能的影响

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摘要

The effects of waste concrete (WC) properties (compressive strength of the concrete and its aggregate) on the properties of recycled aggregate concrete (RAC) were investigated in two parts: WC and RAC. WCs, the first part of the study, cover three different strength limestone aggregate types and concrete mixtures with five different water/ concrete ratios (0.69, 0.54, 0.42, 0.37, 0.32) in each aggregate type. RACs, the second part of the study, were prepared with three different w/c ratios (0.30, 0.35, 0.40), and 100% coarse recycled aggregates supplied from each WC. Some tests - compressive strength, ultrasonic pulse velocity, Schmidt rebound hammer, specific gravity and water absorption - were performed on the hardened WC and RAC samples. It was found that the compressive strength of RAC was mainly dependent on the strength of limestone aggregate and w/c ratio, while WC strength affected the strength to a lesser extent. The correlation coefficients of RAC for the ultrasonic pulse velocity, Schmidt rebound number, specific gravity and water absorption values against uniaxial compressive strength were found to be significantly lower than those of WC.
机译：研究了废混凝土（WC）性能（混凝土及其骨料的抗压强度）对再生骨料混凝土（RAC）性能的影响，分为两个部分：WC和RAC。 WCs是研究的第一部分，涵盖了三种不同强度的石灰石骨料类型以及每种骨料类型中具有五种不同水/混凝土比率（0.69、0.54、0.42、0.37、0.32）的混凝土混合物。 RAC是研究的第二部分，制备时使用了三种不同的w / c比（0.30、0.35、0.40），并且从每个WC提供了100％的粗再生料。在硬化的WC和RAC样品上进行了一些测试-抗压强度，超声脉冲速度，施密特回弹锤，比重和吸水率。发现RAC的抗压强度主要取决于石灰石骨料的强度和w / c比，而WC强度对强度的影响程度较小。发现RAC与超声脉冲速度，施密特回弹数，比重和吸水率与单轴抗压强度的相关系数显着低于WC。

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  • 来源
    《Magazine of Concrete Research》 |2013年第14期|844-854|共11页
  • 作者

    H. Sueleyman Goekce; Osman Simsek;

  • 作者单位

    Ege University, Engineering Faculty, Department of Civil Engineering, Izmir, Turkey;

    Gazi University, Technology Faculty, Department of Civil Engineering, Ankara, Turkey;

  • 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
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