Coal fly ash in concrete - Coal fly ash

Coal fly ash in concrete, SiO2: 56% - 62%, Al2O3: 33% - 38%, CaO: 0.2%-0.4%, MgO: 0.8%-1.2% - details see: https://www.buildingsupplieshub.com/coal-fly-ash-in-concrete-10083292

Place of Origin: Fujian China (Mainland)	Brand Name: Yulin	Model Number: Coal fly ash	Color: Grey
Feature: Acid-Proof,Sulfate Resistant	Main Raw Material: Aluminate	Type: Silicate Cement / Portland Cement	Hardening Feature: Rapid Hardening
Heat of Hydration: Low-Heat	Strength Grade(Mpa): Other

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1.Product Name :Fly Ash

Fly ash is a fine, glass-like powder recovered from gases created by Coal-fired Electric Power Generation. It is an economic replacement for Portland cement used in concrete, while it actually improves strength, segregation, and ease of pumping of the concrete. Fly ash is also used as an ingredient in brick, block, paving, and structural fills.

Usage:

Consisting mostly of silica, alumina and iron, fly ash is a pozzolan--a substance containing aluminous and silicious material that forms cement in the presence of water. When mixed with lime and water it forms a compound similar to portland cement. The spherical shape of the particles reduces internal friction thereby increasing the concrete's consistency and mobility, permitting longer pumping distances. Improved workability means less water is needed, resulting in less segregation of the mixture. Although fly ash cement itself is less dense than portland cement, the produced concrete is denser and results in a smoother surface with sharper detail.

Sr	Test Name	Results	Specification

	Chemical Parameter
1.	Loss on Ignition, % by mass	0.85	Max. 5.0
2.	Total Sulphur as Sulphur trioxide (SO3), %	0.74	Max. 3.0
3.	Available alkalis as Sodium oxide (Na2O)%	0.50	Max. 1.5
4.	Silicon dioxide, (SiO2), % by mass	60.10	Min. 35
5.	SiO2 + Al2O3 + Fe2O3, % by mass	88.59	Min. 70
6.	Reactive Silica, % by mass	35.84	Min. 20
7.	Magnesium Oxide (MgO), % by mass	3.09	Max. 5.0
8.	Total Chlorides, % by mass	0.018	Max. 0.05
9.	Moisture Content, % by mass	0.26	Max. 2.0
10.	45 Micron % Passing	80	--

	Physical Parameter
11.	Fineness - Specific Surface by Blaine, m2/kg	359.8	Min. 320.0
12.	Soundness by autoclave test expansion %	0.05	Max. 0.8
13.	Comp.Strength at 28 days controlled mixed	30.9	--
14.	Comp.Strength at 28 days Pozzolana mixed	25.4	--
15.	28 Days strength % of cement reactivity	82.2	Min. 80
16.	Lime Reactivity avg. comp. strength, N/mm2	6.1	Min. 4.5