Name: Fly Ash - Premium Industrial Material
Brand: Ruvelis Global
Availability: InStock

Question 1

What is the difference between Class F and Class C fly ash?

Accepted Answer

Class F fly ash is produced from burning anthracite or bituminous coal and contains less than 10% lime (CaO). It is pozzolanic in nature, requiring a cementing agent like Portland cement to react and form cementitious compounds. Class C fly ash is produced from burning lignite or sub-bituminous coal and typically contains 10% or more lime. Due to its higher calcium content, Class C fly ash has self-cementing properties and can harden and gain strength without the addition of cement.

Question 2

How does fly ash improve concrete performance?

Accepted Answer

Fly ash improves concrete performance in several ways: it reduces permeability, improves workability, increases long-term strength, reduces heat of hydration, enhances durability against chemical attacks, reduces alkali-silica reaction, improves sulfate resistance, and reduces shrinkage. The spherical particles act as ball bearings in the concrete mix, improving flowability and allowing for better compaction with less water, resulting in stronger and more durable concrete.

Question 3

What are the environmental benefits of using fly ash?

Accepted Answer

Using fly ash in concrete and other applications provides several environmental benefits: it reduces the need for landfill disposal of ash, decreases cement production (which is carbon-intensive), lowers energy consumption, reduces greenhouse gas emissions, conserves natural resources like limestone, and results in more durable structures that require less maintenance and replacement. For every ton of cement replaced by fly ash, approximately 0.8 tons of CO₂ emissions are avoided.