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Coal Fly Ash

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COAL FLY ASH

Coal fly ash is one of the residues generated in the combustion of coal, and generally captured from the coal-fired power stations. Depending upon the source and makeup of the coal being burned, the components of fly ash vary considerably, but all coal fly ash includes substantial amounts of silicon dioxide (both amorphous and crystalline) and calcium oxide, which is commonly used to supplement Portland cement in concrete production so that both technological and economic benefits can be generated, and it is increasingly being used in the synthesis of geopolymers and zeolites.

Xiamen Bentonite International Corporation (XBIC) is a leading supplier of the coal fly ash, has established long-term partnerships with several coal-fired power stations in China, and collect the coal fly ash in bulk tanker, offload them in silos in our ash station and then refill the coal fly ash in jumbo bags of around 1400kgs for distribution to our customers. Our annual output of Hammer ® – coal fly ash is nearly 300,000mt, which is produced in conformance with the ASTM C618 specification, and the quality is controlled and monitored throughout the entire production process to ensure that it meets or exceeds the specification requirements.


Chemical Composition

ASTM C618

GB/T1596: 2005

Test Results

Class I

Class II

Class I

Class II

SiO2+Al2O3+Fe2O3

min. 70.0%

min. 70.0%

min. 70.0%

88.1%

78.9%

SiO2

min. 35.0%

min. 35.0%

min. 35.0%

51.0%

49.0%

Reactive silica

min. 20.0%

min. 25.0%

min. 25.0%

-

-

MgO

max. 5.00%

max. 4.00%

max. 4.00%

0.90%

1.91%

SO3

max. 5.00%

max. 3.00%

max. 3.00%

0.30%

0.42%

F-CaO

-

max. 1.00%

max. 1.00%

0.01%

0.13%

Na2O

max. 1.50%

max. 1.50%

max. 1.50%

0.36%

0.66%

Moisture content

max. 3.00%

max. 1.00%

max. 1.00%

0.19%

0.20%

Loss on Ignition

max. 6.00%

max. 5.00%

max. 8.00%

3.70%

4.00%

Total Chlorides

max. 0.05%

max. 0.05%

max. 0.05%

0.03%

0.04%

 

Physical Properties

ASTM C618

GB/T1596-2005

Test Results

Class I

Class II

Class I

Class II

Percent retained on 45μm sieve

max. 34.0%

max. 12.0%

max. 25.0%

9.30%

15.3%

Ratio of water demand

max. 105%

max. 95.0%

max. 105%

92.0%

99.0%

Compressive strength at 28 days

min. 75.0%

min. 75.0%

min. 75.0%

82.0%

80.0%

Lime Reactivity

-

min.5.00N/cm2

min.5.00N/cm2

6.00N/cm2

5.50N/cm2

Soundness by autoclave

max. 0.8%

max. 0.2%

max. 0.2%

0.12%

0.16%

 

Packaging

Hammer ® - coal fly ash is supplied in uv-proof and aging-resistant jumbo bag according to GB/T10454 and EN ISO 21898, which is suitable to be stored in a severe environment for long term.

Packed in 1400kgs jumbo pp bag with pe liner.
18bags / 25.20mt into 1 x 20ft.container




Storage and Transportation

thousands square meters of warehouse in CMP
container shipment
bulk shipment




Quality control

physical and chemical tests during production process
sampling from the finished coal fly ash packed into the jumbo bag
meet or exceed the specification of ASTM C618 and GB/T1596: 2005
inspection before delivery
provide SGS inspection certificate as per customer's requirements