Development of controlled low strength material (CLSM) using self-cementitious flyash

Sanghyeong Lim, Hyunwook Choo, Woojin Lee, Changho Lee

Research output: Contribution to conferencePaper

Abstract

This experimental investigation aims at developing controlled low strength materials (CLSM) using a self-cementitious fly ash and bottom ash (aggregate). The fly ash and bottom ash specimen used in this study were obtained from a circulating fluidized bed combustion boiler (CFBC). To find the optimum mixing condition satisfying flow consistency and unconfined compression strength (UCS), the CLSM specimens were prepared under various mixing conditions, including varying aggregate types and fractions. Additionally, the prepared specimens were evaluated through scanning electron microscope and X-ray diffraction (XRD). The results of this study demonstrate that the UCS ranges from 325 kPa to 1855 kPa, and the water content satisfying flow consistency ranges from 42 to 85%. The USC increases with increasing the fraction of aggregate in whole mixture. The flowability is improved with increasing the fraction of aggregate as well. SEM images and XRD patterns reveal that both geopolymerization and C-S-H reaction. With those results, CLSM based on CFBC fly ash could be used as an alternative material to apply various geotechnical problems.

Translated title of the contributiontrans-korea
Original languageEnglish
Pages2579-2582
Number of pages4
Publication statusPublished - 2017 Jan 1
Event19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of
Duration: 2017 Sep 172017 Sep 22

Other

Other19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017
CountryKorea, Republic of
CitySeoul
Period17/9/1717/9/22

Keywords

  • Bottom ash
  • CFBC fly ash
  • Controlled low strength material (CLSM)
  • Self-cementitious fly ash

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Lim, S., Choo, H., Lee, W., & Lee, C. (2017). Development of controlled low strength material (CLSM) using self-cementitious flyash. 2579-2582. Paper presented at 19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017, Seoul, Korea, Republic of.