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Production and sales of fly ash

Other beneficial uses of fly ash

Fly ash production and its repurposing in various markets are quantified in data from FHWA (v) and EPA (vi) (see the sidebar “Fly Ash Reuse”). From these data, we see that the lion’s share of recycled fly ash goes into making concrete, and the reason is because fly ash delivers measurable economic and structural benefits. Its worldwide availability, outstanding structural contributions (strength and durability) and relatively economical cost create a constant demand for fly ash in the construction industry.

 

Several NPCA publications explain fly ash in more technical detail, including its important environmental benefits, its material properties, chemical reactions and guidelines for production (vii).

The following is a summary list of fly ash’s contribution to concrete:

  1. Increases ultimate concrete strength
  2. Increases concrete durability
  3. Is more economical than portland cement
  4. Reduces the heat of hydration (first used in mass concrete construction in the building of Hungry Horse Dam, Montana,1948)
  5. Reduces risk of alkali-silica reaction (ASR)
  6. Increases resistance to sulfate attack
  7. Reduces concrete bleeding (water loss at the surface after placement)
  8. Reduces concrete shrinkage during curing
  9. Reduces the amount of water required in mixtures
  10. Reduces permeability (increases concrete’s resistance to water penetration)
  11. Improves workability (microscopic, spherical-shaped particles create a more flowable, easier-to-finish concrete)
  12. Lightens the color of concrete
  13. Fulfills LEED points (LEED MR 4.1, Reclaimed Materials/Recycled Content) and is routinely specified on many green projects
  14. Meets the guidelines of many building codes, design guidelines and standards that encourage fly ash recycling in concrete.
  15. Meets ASTM standards and test methods (ASTM C618-08, C1240 and C 311-07)(viii)
  16. Is environmentally beneficial (ix).

 

 

Supplying fly ash additive for construction of Namtheun1 Hydropower dam, Bolikhamsay province, Laos

Main product :

Wet Fly ash + moisture ≤ 20%

+ Dry Fly ash ≤ 3% humidity

MKN + content (loss on ignition) ≤ 6%

(Products meet ASTM - American C618)

Application of fly ash:

Additives for roller compacted concrete, high-quality concrete, self-compacting concrete, concrete Reunited sun, dotted concrete intrusion of sea water corrosion, ...; additives for cement production, raw material production unbaked (lightweight concrete blocks, panels, wall panels, ceiling panels, flooring, fire-proofing materials, sound ...)

Fly ash features:

To reduce the rate of water, cement should reduce concrete shrinkage phenomenon

Increased adhesion between layers of concrete poured by the retarding effect of cement using fly ash

Mortar and concrete do better adhesion to the reinforcement and improvement of conditions for surface finishing

Increase the intensity at a later age, reduce costs, enhance waterproofing, corrosion resistance Cl, sulfate increased durability.

Reduce heat to cement hydration, is very effective when a large block of concrete construction, reduce reactive alkali - silica.

Byproducts: carbon through recruitment (clean coal)

Application: for production of coke, activated carbon; for light industries such as ceramics, porcelain; Fuel clay brick production; fuel serving people

Name of company: CAT PHU FLY ASH JIONT STOCK COMPANY
 
Head office: 271 - 273 Ngo Quyen st, Van My ward, Ngo Quyen dist, Hai Phong city, Viet Nam
 
Tel: +84 313 978 121/ 313 827 127 Fax: +84 313 978 122
 
Hand phone: 84.943.818818, 84.902.241288
 
Website: www.catphu.vn


Online support

Mr. Trần Vương Luân

+84 943.818.818
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