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Combined effects of fly ash and waste ferrochromium on properties of concrete

机译：粉煤灰和废铬铁对混凝土性能的综合影响

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摘要

Cement and water-to-binder ratio were kept constant as 400 kg/m~3 and 0.40, respectively. Cement was replaced with fly ash at the ratio of 10, 20 and 30 wt.%. Coarse limestone aggregates were replaced with coarse ferrochromium aggregate at the ratio of 25, 50 and 75 wt.%. On fresh concretes, slump, air content and unit weight tests were performed. On the hardened concretes, compressive strength, splitting tensile strength, elasticity modulus, abrasion resistance, freeze-thaw resistance, porosity and water absorption were determined. The use of fly ash lowers values several properties: compressive strength, splitting tensile strength, elasticity modulus and wear resistance; however freeze-thaw durability increases. Usage of ferrochromium aggregates increases strength of concrete and also abrasive wear resistance. Effect of ferrochromium aggregates on porosity and water absorption of concrete is insignificant while fly ash enhances these properties. A highly accurate equation relating compressive strength to splitting tensile strength is provided. An equation relating wear to compressive strength and fly ash volume fraction is also defined.
机译：水泥和水灰比保持恒定，分别为400 kg / m〜3和0.40。用粉煤灰以10、20和30重量％的比例代替水泥。将粗石灰石骨料替换为粗铬铁骨料，比例为25、50和75 wt。％。在新鲜混凝土上，进行了坍落度，空气含量和单位重量测试。测定硬化混凝土的抗压强度，劈裂抗拉强度，弹性模量，耐磨性，抗冻融性，孔隙率和吸水率。粉煤灰的使用降低了几种性能的值：抗压强度，劈裂抗张强度，弹性模量和耐磨性；但是，冻融耐久性提高。铬铁骨料的使用提高了混凝土的强度，并提高了耐磨性。铬铁骨料对混凝土的孔隙率和吸水率的影响微不足道，而粉煤灰则增强了这些性能。提供了将抗压强度与抗拉强度相关的高精度方程。还定义了将磨损与抗压强度和粉煤灰体积分数相关的方程。

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  • 来源
    《Construction and Building Materials》 |2012年第2012期|p.633-640|共8页
  • 作者

    Osman Gencel; Fuat Koksal; Cengiz Ozel; Witold Brostow;

  • 作者单位

    Department of Civil Engineering, Faculty of Engineering, Bartin University, 74100 Bartin, Turkey,Department of Civil Engineering, Faculty of Engineering and Architecture, Bozok University, 66000 Yozgat, Turkey;

    Department of Civil Engineering, Faculty of Engineering and Architecture, Bozok University, 66000 Yozgat, Turkey;

    Department of Construction Education, Faculty of Technical Education, Suleyman Demirel University, 32260 Isparta, Turkey;

    Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Center for Advanced Research and Technology (CART),University of North Texas, 3940 North Elm Street, Demon, TX 76207, USA;

  • 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

    concrete durability; ferrochromium; fly ash; waste in concrete;

    机译：混凝土耐久性;铬铁粉煤灰混凝土浪费;

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