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Durability aspects of HVFA-based recycled aggregate concrete

机译：HVFA基再生骨料混凝土的耐久性方面

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摘要

The utilisation of recycled coarse aggregate obtained from demolished concrete has gained momentum in recent years due to its contribution towards sustainability by minimising the use of artificially produced materials and eliminating environmental problems due to dumped waste materials. The present research exploited the possibility of producing high-volume fly ash (HVFA)-based recycled aggregate (RA) high-strength concrete. It was found that 50% of desired strength could be achieved even with 50% replacement of cement with fly ash and 50% of natural aggregate (NA) with RA. An attempt was thus made to study the effects of RA and HVFA on durability characteristics. The parameters considered were resistance to chloride ion penetration, acid attack, sulfate attack and sorption. It was found that replacement of NA with RA and cement with fly ash in higher volumes showed a way of considering economy and environmental effects as criteria, given a little bit of compromise towards strength and durability criteria but still falling well within an acceptable limit.
机译：从拆除的混凝土中获得的再生粗骨料的利用近年来获得了发展势头，这是因为它通过最大限度地减少人工生产的材料的使用并消除了由废料产生的环境问题对可持续性的贡献。本研究利用了生产高粉煤灰（HVFA）基再生骨料（RA）高强度混凝土的可能性。已经发现，即使用粉煤灰替代水泥50％，用RA替代天然骨料（NA）50％，也可以达到50％的所需强度。因此尝试研究RA和HVFA对耐久性能的影响。所考虑的参数是对氯离子渗透，酸侵蚀，硫酸盐侵蚀和吸附的抵抗力。研究发现，在强度和耐久性标准上有一些折衷的情况下，用RA代替NA并用粉煤灰代替水泥可显示出将经济和环境影响作为标准的方法，但仍在可接受的范围内。

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  • 来源
    《Magazine of Concrete Research》 |2014年第4期|186-195|共10页
  • 作者

    Palanirai Saravanakumar; Govindasamy Dhinakaran;

  • 作者单位

    School of Civil Engineering, Sastra University, Thanjavur, India;

    School of Civil Engineering, Sastra University, Thanjavur, India;

  • 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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