Question
Download Solution PDFThe addition of a portion of fly-ash in the mix design results in reduction in:
i) permeability
ii) chemical attack
iii) heat of hydration
iv) initial setting time
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Fly-Ash:
- Fly ash is a fairly divided residue that results from the combination of ground or powdered bituminous coal or sub-bituminous coal like lignite or pulverized coal.
- It is a by-product of many thermal power stations and other plants using pulverized coal or lignite as a source of heat for boilers.
Advantages of adding Fly ash in the mix design:
- Improved workability.
- Decreased water demand.
- Reduced heat of hydration.
- Increased ultimate strength.
- It reduced drying shrinkage.
- Reduced permeability.
- Improved durability.
- Increase the initial setting time.
- Reduction in chemical attack, etc.
Last updated on May 28, 2025
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