Microsilica NR92U

Microsilica NR92U is an undensified dry powder microsilica admixture for Portland cement concrete and mortars.

Microsilica NR92U is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form.

Microsilica NR92U meets the requirements of ASTM C-1240 and contains a minimum of 92% silicon dioxide (SiO2)

Chemical&Physical Analysis



 ≥ 92%





loss on ignition




Specific surface(BET)

≥ 18 m²/g


Product: Undensified Microsilica NR92U ( Undensified Silica Fume NR92U)

Undensified  Bulk density (300 kg/m³)

Microsilica properties

Physical State Ultrafine amorphous powder
Color Light to dark gray
Solubility(Water) Insoluble to slightly soluble
Melting point(℃) Approx. 1230
specific Gravity 2.2-2.3
Bulk density(kg/m³) 300kg/m³
Particle size(μm) Approx 0.3

Packaging & Delivery

10kg soluble paper bags x 96 on the pallets.
20kg soluble paper bags x 48 on the pallets.
950kg plastic woven bags x 2 on the pallets(with or without bottom output )
1000kg plastic woven bags x 2 on the pallets(with or without bottom output )

We can also customize bags according to your requirement.


. Lowers concrete permeability.
. Significantly increases concrete durability.
. Increases ultimate strength gain.
. Beneficial in all types of high strength concrete applications.
. Improves bond strength to steel.
. Significantly reduces alkali-silica reactivity.
. Provides excellent resistance to sulfate or seawater attack.
. Reduces steel corrosion.
. Improves freeze/thaw durability of concrete.

Why choose us?

Our company has rich experience in the production and sales of microsilicon powder. The annual sales volume of our export has reached over 300,000 tons per year. We keep good communication with customers in order to understand their needs and market trends.

We have years of experience in controlling the cost of prices. By optimizing the production process of products, improving the efficiency of silica fume collection, reasonable distribution and storage, and cooperating with many logistics companies at home and abroad, We can provide the most favorable price in the industry.

We know very well that the choice of raw materials will lead to the difference in product quality, so we strictly control the quality of raw materials, check the quality of products layer by layer, and try our best to make customers satisfied.

Application in concrete, Refractory, Highway construction, Ports,  bridges and saltwater engineering.

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