Undensified Microsilica

Undensified Microsilica Specification

Appearance
Greyish-white powder

Smell
Odorless

EINECS No
273-761-1

Properties
High pozzolanic activity, fine particle size, increases strength and durability in concrete, improves water resistance, excellent dispersion

Grade
Industrial Grade

Taste
Odorless and tasteless

Application
High-performance concrete, refractory castables, shotcrete, oil-well grouting, repair mortars, precast elements

Ph Level
~7 (neutral)

Solubility
Insoluble in water

Poisonous
Non-poisonous

Shape
Spherical Microspheres

Melting Point
~1600C

Ingredients
Amorphous silicon dioxide (SiO) > 85%

CAS No
69012-64-2

Refractive Rate
~1.46

Structural Formula
O=Si=O

HS Code
28112200

Usage
Used as a mineral admixture in concrete and refractories to increase compressive strength, reduce permeability, and improve durability

Product Type
Undensified Microsilica

Molecular Formula
SiO

Purity
> 85% SiO

Storage
Store in a dry, cool, and well-ventilated area in tightly sealed containers

Molecular Weight
60.08 g/mol

Density
2.2 Gram per cubic centimeter(g/cm3)

Shelf Life
24 months from production date under proper storage

Physical Form
Powder

Color
Grey to off-white

Packaging
25 kg/50 kg bags or bulk tonne bags

Bulk Density
250-350 kg/m

Loss on Ignition (LOI)
< 3.0%

pH (in Water)
6-7

Surface Area
15 30 m/g (BET method)

Toxicity
Non-toxic

Average Particle Size
0.1 0.3 microns

Fineness
> 95% passing 45 micron sieve

Reactive Silica Content
> 85%

Chloride Content
< 0.1%

Compatibility
Compatible with all types of Portland cement and cementitious mixtures

Microstructure
Amorphous ultrafine silica particles

About Undensified Microsilica

We are manufacturer of Densified and Undensified Microsilica which is widely used in concrete applications, high strength roads, dams, bridges due to its high strength as compared to cement. Our quality of undensified Microsilica is much better as compared to other countries.

Enhanced Performance in Concrete and Refractories

Undensified Microsilica significantly boosts the strength, impermeability, and longevity of concrete and refractory castables. Its ultrafine, amorphous structure ensures superior particle dispersion and excellent pozzolanic reactivity, minimizing defects and improving finished product quality. The material is compatible with a wide range of cementitious binders, supporting advanced construction and industrial applications.

Safe, Versatile, and Easy to Handle

This microsilica product is non-toxic, odorless, and tasteless, making it safe for handling and application. Its powder form and high purity make it easy to blend with other materials. Additionally, its stabilityoffering a stable shelf life of up to 24 monthsassures reliable performance when stored correctly in well-sealed containers.

FAQs of Undensified Microsilica:

Q: How is Undensified Microsilica typically used in concrete applications?

A: Undensified Microsilica is used as a mineral admixture in concrete to enhance compressive strength, decrease permeability, and increase durability. It is commonly incorporated during the mixing process, where its ultrafine particles fill in pores, refine microstructure, and react with calcium hydroxide to form additional cementitious compounds.

Q: What are the main benefits of adding Undensified Microsilica to construction materials?

A: The primary benefits include significantly improved compressive strength, reduced water permeability, increased chemical resistance, enhanced durability, and better overall performance of concrete and refractory products. Its fine particle size and high pozzolanic reactivity contribute to these advantageous properties.

Q: When should Undensified Microsilica be added during the mixing process?

A: It is best to add Undensified Microsilica during the initial mixing stage of concrete or refractory production. This ensures even dispersion throughout the mixture, maximizing its pozzolanic effect and performance improvements.

Q: Where can Undensified Microsilica be applied beyond traditional concrete?

A: Beyond high-performance concrete, Undensified Microsilica is used in refractory castables, repair mortars, shotcrete, oil-well grouting, and precast elements, wherever improved strength and durability are desirable.

Q: What storage conditions are recommended for maintaining product quality?

A: To maintain Undensified Microsilicas effectiveness, store it in a dry, cool, and well-ventilated area, sealed tightly in bags or containers. Proper storage ensures a shelf life of up to 24 months from the production date.

Q: Is Undensified Microsilica safe and environmentally friendly to handle?

A: Yes, this product is classified as non-toxic, non-poisonous, and odorless. While it poses no significant health risks during normal handling, standard safety precautions when dealing with fine powders should be observed.

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