StroyMechanika LTD
6, Lyulin str., Rudakov stlm., Tula, Russia
Tel: +7 4872 701 400

E-mail:
sales.foamconcrete@gmail.com

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News

24 February, 2014
Signing of contract for Albania
StroyMehanika LTD signed the contract with a company ALART shpk, Albania.
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December 5, 2013
Supply of equipment to Nigeria

"StroyMehanika" LTD signed the contract with a Nigerian company "KINGSDALE MULTI-RESOURCES LIMITED" for supply of machinery on "Sistrom" technology.
More >>

November 11, 2013
Sales contract for supply of equipment to Iraq
On November 8, 2013 the company "Stroymechanika" OOO signed the sales contract with company "ISOCRETE Factory" for supply of equipment for foam concrete, polystyrene concrete to Iraq.
More >>

 

Microsilica

Microsilica is used as highly active mineral concrete and cement agent and intended to mix high-grade concrete by strength, water resistance and high rust-proof quality.

The admissible concrete application area with microsilica (at its dosing to 20% from cement mass) - all concrete and reinforced concrete buildings of construction and industrial engineering, including potable water supply system.

Chemical composition

SiO2 Al2O3 Fe2O3 CaO MgO Na2O K2O C S
90-92% 0,68% 0,69% 0,85% 1,01% 0,61% 1,23% 0,98% 0,26%

Physical property

Particle size <1mkm
Density
- non-compacted
- compacted
- suspension
 
from 130 to 350 kg/m³
from 480 to 720 kg/m³
from 1320 to 1440 kg/m³
Surface area from 13 000 to 30 000 m²/kg

Advantages from use of microsilica:

  • Strength gain
    Microsilica can ensure the compressive strength, much more exceeded the strength of normal concretes, and this is an aggregate strength that is the limiting factor here. At the application of natural aggregates the strength more than 150 N/mm² is reached, and at the application of special high-strength aggregates, the strength of 300 N/mm² can be reaches.
  • Penetrability
    The effect of interstices filling created by pozzolanic spherical microparticle, favours to low the concrete capillary porosity and penetrability. Practically the impenetrable concrete can be received at reasonable microsilica content and rather low type I cement content. As microsilica effects more the penetrability than the strength, the concrete with microsilica will be always less permeable, than the concrete in type I cement of the same strength.
  • Protection of reinforcement
    In Norway and Sweden the studies of concrete buildings at the age of 12 years showed that high-qaulity concretes with microsilica are not less stable to be carbonized than the concretes of the same strength on ordinary Portland cement and prevent much better the penetration of salt water chlorides (the great quantity of laboratory measurements of reinforcement corrosion are made. It is safe to say that on condition of proper curing the capacity of concrete with microsilica to protect steel reinforcement will not differs a lot as compared with concrete of the same strength on ordinary Portland cement).
  • Freeze-thaw durability
    The low permeability and augmented cement stone density provide the good freeze-thaw durability of microsilica concrete. The microsilica is combined with the air-entraining agents. In fact the stable rheological structure of plastic microsilica concrete reduces the loss of the entrained air at transportation and vibration.
  • Chemical influence
    It is known that the low permeability and low free lime content improve the concrete resistance to influence of aggressive chemicals. The microsilica concrete is possessed of all these features and shows the excellent resistance to many foreign substances. The long-term field tests in Norway showed that it was compared with sulfate resistant Portland cement by its resistance to sulfates.
  • Economy
    The application of condensed microsilica in the mass construction allows to save 40% of cement not worsening the concrete characteristics and reducing the heat energy at heat and humidity processing of articles.

 

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Services

Consultations and services in the building materials production

Development of technical specifications and technological schedules

Contract supervision of the equipment

 
Our dealers
In Russia:
Moscow
Saint-Petersburg
Voronezh
Nizhniy Novgorod
Ryazan
Irkutsk
Omsk
Yekaterinburg
Krasnoyarsk
In Belorussia:
Minsk
 
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