E.M.MICROSILICA E.M.MICROSILICA | Concrete Admixtures

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E.M.MICROSILICA

AMORPHOUS (NON-CRYSTALLINE) SILICON DIOXIDE (SIO2)
E. M. MICROSILICA is a very fine, gray powder with highly active pozzolanic properties.
E. M. MICROSILICA can be used in addition of cement or as replacement of a part of cement content.

It has to be mentioned that E. M. MICROSILICA is composed of amorphous silica
produced by electric arc furnaces as a byproduct of the production of elemental silicon or ferrosilicon alloys.
It meets the requirements of the following standard:
ASTM C 1240, ISIRI 13278

Method

DOSAGE

Depending on concrete mix design (sizes and types of aggregates, cement content, water/cement ratio, ambient temperature and concreting conditions),
a dosage of between 7 and 12 percent by weight of cement or cementitious material is recommended.
For use with other range of dosage, contact ABADGARAN Technical Services Department.

NOTE: Due to water absorption of E. M. MICROSILICA, it should be used with plasticizer admixtures. Otherwise it causes cracks and reduces the efficiency of the concrete.

DIRECTION OF USE
E. M. MICROSILICA can be added to the concrete by one of the following procedures:
1- It can be mixed with other dry components of the mixture, especially cement, before addition to the mixer.
2- It can be mixed with sufficient water, and be added to the mixer in slurry form. In this case the water content of slurry should be considered as a part of mixing water.

Properties

ADVANTAGES

Increasing mechanical properties of concrete.
High performance properties such as high strength & durability in concrete.
Workability improvement of concrete, grout and mortar.
Lowering the hydration reaction and prevention from cracking.
Excellent improvement in consolidation of concrete.
Lowering the pH of cementitious mixtures.
Preventing Alkali Silica Reaction in concrete and mortars.
Excellent improvement in concrete permeability.
Excellent improvement in electrical resistivity of concrete.

Application

FIELD OF APPLICATION

Concrete in marine environments.
Precast concrete.
High Performance Concrete (HPC).
High strength concrete (HSC).
Sulfate Resistant Concrete.
Chloride resistant concrete.
Where Alkali Silica Reaction is expected.
Sewage works and drinking storage systems.
Concreting piles & bridge decks.

Physical and Chemical Properties

Physical state	Powder
Color	Gray

Considerations

STORAGE
Shelf life: Unlimited, in the original package.
Storage condition: should be protected from direct sunlight and moisture. Keep bag in temperature range of +10°C to +30°C.
Packing: 300-450 kg big bags.

Protection and Safty

HEALTH AND SAFETY
Silica fume has not been classified for hazardous physicochemical properties under the Globally Harmonized System (GHS).
No classification for health and environment hazards. The dust from silica fume may cause nonspecific mechanical irritation to the eyes and respiratory tract. Use an approved NIOSH dust
respirator with a minimum N95 rating. It should not be swallowed and contact with skin and eyes.
In case of contact with eyes, rinse immediately with plenty of water.

E. M. MICROSILICA is not flammable.
For further information refer to the material safety data sheet. MSDS is available at ABADGARAN website.

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