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Utilization of fly ash with silica fume and properties of Portland cement-fly ash-silica fume concrete

机译：硅粉对粉煤灰的利用及硅酸盐水泥-粉煤灰-硅粉混凝土的性能

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摘要

This paper reports the normal consistency, setting time, workability and compressive strength results of Portland cement-fly ash-silica fume systems. The results show that water requirement for normal consistency was found to increase with increasing SF content while a decrease in initial setting time was found. Workability, measured in term of slump, was found to decrease with silica fume content (compared to blends without silica fume). However, it must be noted that despite the reduction in the slump values, the workability of Portland cement-fly ash-silica fume concrete in most cases remained higher than that of the Portland cement control concrete. Furthermore, the utilization of silica fume with fly ash was found to increase the compressive strength of concrete at early ages (pre 28 days) up to 145% with the highest strength obtained when silica fume was used at 10 wt%. Moreover, scanning electron micrographs show that utilization of fly ash with silica fume resulted in a much denser microstructure, thereby leading to an increase in compressive strength.
机译：本文报告了硅酸盐水泥-粉煤灰-硅粉系统的正常稠度，凝结时间，可加工性和抗压强度结果。结果表明，正常浓度的水分需求随SF含量的增加而增加，而初始凝固时间则减少。发现以坍落度衡量的可加工性随硅粉含量的降低而降低（与不含硅粉的混合物相比）。然而，必须指出的是，尽管坍落度值降低了，但在大多数情况下，波特兰水泥-粉煤灰-硅粉混凝土的可加工性仍高于波特兰水泥对照混凝土。此外，发现将粉煤灰与粉煤灰一起使用可将早期（28天前）混凝土的抗压强度提高至145％，其中以10％（重量）使用粉煤灰可获得最高的强度。此外，扫描电子显微照片显示，粉煤灰与硅灰的利用导致了更致密的微观结构，从而导致了抗压强度的提高。

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  • 来源
    《Fuel》 |2010年第3期|768-774|共7页
  • 作者

    Thanongsak Nochaiya; Watcharapong Wongkeo; Arnon Chaipanich;

  • 作者单位

    Construction Materials Research Unit, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;

    Construction Materials Research Unit, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;

    Construction Materials Research Unit, Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;

  • 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

    fly ash; silica fume; compressive strength; microstructure; concrete;

    机译：粉煤灰硅粉抗压强度;微观结构具体;

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