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Engineering properties of controlled low-strength materials containing co-fired fly ash

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Abstract

In this study, it investigated the effects of adding a mixture of circulating fluidized bed co-fired fly ash and bottom ash on controlled low-strength material (CLSM). Experiment variables were as follows: (1) mixing of co-fired fly ash, cement, and pulverized coal fly ash in various proportions to evaluate the effectiveness of using co-fired fly ash as cementitious material in CLSM; (2) mixing of bottom ash and natural fine aggregate in various proportions to evaluate the effectiveness of using bottom ash mixture as aggregates in CLSM. The water-cement ratio of CLSM was fixed at 0.85. Assessments were conducted using a lump flow test, flow consistency test, ball drop test, chloride ion measurement, compression strength test, and length change test. Test results indicate the following: (1) increasing the replacement ratio of co-fired fly ash and bottom ash decreases flowability; (2) the addition of co-fired ash (containing chlorine), with bottom ash increases the amount of chloride ions in CLSM; (3) the addition of co-fired fly ash reduces setting time; (4) the CaO, SiO2, and Al2O3 in co-fired fly ash and bottom ash increase the compressive strength of CLSM; (5) the CaO contained in the mixture of co-fired fly ash and bottom ash causes CLSM to expand.

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Authors and Affiliations

  1. Physics Division, Tatung University, Taipei, Taiwan

    Tsai-Lung Weng

  2. Institute of Engineering Management, College of Engineering, Tatung University, Taipei, Taiwan

    Tsai-Lung Weng

  3. Department of Civil Engineering, National Ilan University, Ilan, Taiwan

    Wei-Ting Lin

  4. Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung, Taiwan

    Yen-Liang Liu

Authors
  1. Tsai-Lung Weng
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  2. Wei-Ting Lin
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Correspondence to Wei-Ting Lin.

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Weng, TL., Lin, WT. & Liu, YL. Engineering properties of controlled low-strength materials containing co-fired fly ash. Monatsh Chem 148, 1337–1347 (2017). https://doi.org/10.1007/s00706-017-1925-9

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  • DOI: https://doi.org/10.1007/s00706-017-1925-9

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