Our Product Description?
Summary of advantages
LEDMOS Fly Ash is a pozzolan for concrete, consisting of the “finely divided residue that results from the combustion of ground or powdered coal” as defined by ASTM C 618. A pozzolan, as defined by ASTM, reacts chemically with calcium hydroxide produced by the hydration of portland cement to form additional cementitious compounds.
LEDMOS Fly Ash, produced from subbituminous coal, offers both cementitious and pozzolanic properties. This permits a higher percentage of Fly Ash to be used without sacrificing early strength gain.
When correctly proportioned, concrete that contains Fly Ash can have equivalent or greater 28 day, compressive strengths when compared to plain portland cement concrete. Due to the pozzolanic reaction, Fly Ash concrete will continue to gain strength beyond 28 days, exceeding that of plain portland cement concrete.
Features of our product
| In Plastic Concrete: | In Hardened Concrete: | |
|---|---|---|
| • Reduces bleeding and segregation | • Increases ultimate strength | |
| • Improves pumpability | • Reduces drying shrinkage | |
| • Improves finishability | • Decreases permeability | |
| • Lowers heat of hydration | ||
| • Reduces creep |
Source Of Fly Ash
We can provide the fly ash from:
- Majuba Power Station (Mpumalanga Province,South Africa)
- Tutuka Power Station (Mpumalanga Province, South Africa)
Application of our product
LEDMOS TRADING Fly Ash can be used as a pozzolan in virtually any concrete application. When correctly proportioned, LedMos Fly Ash will add many benefits such as increased strength, increased durability and reduced permeability.
LedMos Fly Ash is particularly beneficial in high performance concrete applications where high compressive strengths are required or where exposure conditions demand highly durable concrete.
LedMos Fly Ash can also be effective at mitigating problems associated with alkali-silica reactions when used at high cement replacement rates.
Quality and Specifications
Led-Mos Fly Ash has been comprehensively tested for its suitability as a cement extender. This Fly Ash conforms to the commonly known technical specification such as SANS 50450-1:2011 for Type N. In addition, independent commercial testing laboratories provide compliance testing.
Typical Characteristics:
- Loss of ignition (LOI)
3.0 % - 5.0 %
- Reactive Silicon Dioxide
30%
- eness retained on the 45-micron sieve
34%