Characteristics of Concrete Containing Fly Ash With Hg-Adsorbent

• Author / Creator

  Mahoutian, Mehrdad

• The present study has focused on the effects of Powdered Activated Carbon (PAC) in fly ash on the air-entraining admixture demand and consequent properties of concrete. An extensive laboratory test program was completed during this investigation. Three series of mixes were designed to evaluate the effect of PAC as an Hg-adsorbent on the fresh and hardened properties of concrete containing class F fly ash. In addition to concrete with normal volume fly ash (less than 50% replacement by weight of cement), concrete with high volume fly ash was also cast. Fresh properties including the air void content and density were evaluated. Permeable air voids and compressive strength of hardened concrete at four different ages were also measured. Finally, the air void content, specific surface area, spacing factor and shape factor of hardened concrete were determined using the image analysis technique. The results of this study show that the fly ash if injected with PAC in front of the precipitator has insignificant effect on the mechanical properties and air-void network which affect durability (specifically freeze and thaw resistance) of concrete.

• Subjects / Keywords

  • Image analysis
  • Powdered activated carbon
  • Air-void characteristics
  • Durability
  • Concrete
  • High volume fly ash
  • Permeable voids
  • Fly ash

• Graduation date

  Spring 2012

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3KM70

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.