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Abstract for presentation (Poster or Podium) with a Paper in the Conference Proceedings

Highway Construction

Effect of Coal Bottom Ash/Slag on Fresh, Mechanical, and Durability Properties of Concrete

Monday, June 17, 2024
10:15 AM - 11:30 AM ET
Room: Galleria
Abstract:

 

Depletion of raw materials such as the sand used in concrete production has been a concern for the built environment. The demand to minimize harmful environmental effects and sustainability awareness have led to utilize industrial waste as a substitute for fine aggregates. Using Coal Bottom Ash (CBA) and Coal Bottom Slag (CBS), residues of coal-burning power stations were examined in this study. This research aimed to explore the effects of exploiting CBA and CBS in place of the fine aggregate in concrete fresh properties, mechanical properties, and durability. Experimental investigations were conducted to evaluate the characteristics of hardened concrete when substituting 50% of the fine aggregate with CBA and CBS. Fresh, mechanical as well as durability properties, such as compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, and rapid chloride penetration tests, were carried out and results were contrasted to control concrete. Outcomes of this research revealed that CBA-based concrete increased compressive strength at an early curing age by 74.2%; however, splitting tensile strength and flexural strength were significantly developed at later curing ages: 77.9% and 58.3%, respectively. A higher modulus of elasticity and lower chloride ion penetration severity were also established. These findings indicate that CBA and CBS can be used as fine aggregate substitutes. 

Learning Objectives:

Attendees can expect to learn the following from this session:
  • Conduct the effect of optimum CBA and CBS-based concrete on fresh, mechanical, and durability properties of concrete.
  • Demonstrate the correlation between mechanical characteristics of concrete.
  • Conduct the mechanical and durability tests of CBA/CBS-based concrete in comparison with control concrete.