MASTER CONCRETE ENTERPRISE Ltd.



NIIZhB & Center for Modified Concrete
present

Modified High Performance Concrete



1. General information


  High performance concrete are concrete of high strength, low permeability, high corrosion resistance and durability, i.e. they possess qualities when one prevailing feature or combination of features provide high reliability of constructions depending on utilization conditions. The application of the said concrete mostly allows to avoid the «secondary» corrosion proof layer (coating protection).

Materials
applied

  • MB–01, MB–30C or MB–50C modifiers;

  • Ordinary Portland cement M400 or M500 according to Russian Standard in the amount not exceeding 500 kg/m3;

  • Hard–rock aggregates.
Main
properties

  • Compressive strength range 40–100 MPa which is in accordance with classes B30–B80;

  • Range of short–term and long term deformation characteristics:

    • for concrete class up to B60 (compressive strength up to 80 MPa) – according to the existing Russian state norms and rules for designing reinforced concrete structures (ÑÍèÏ 2.03.01–84);

    • for concrete class over B60 (over 80 MPa) – norms are set specifically;

  • Compressive strength range with normal curing within 24 hours – 25–40 MPa;

  • High tightness for water, gas and chlorides: brand of watertightness exceeds W16–W20, according to Russian Standard;

  • Frostresistance not lower than of ordinary concrete, but with additional use of air entraining or gas forming admixtures can be dramatically increased to brands F700–F1000, according to Russian Standard;

  • Resistance without coating protection in the following environments:

    • in weak acid environment with pH>3;

    • in gas environment with concentration of corrosive gas of one level exceeding the existing Russian norms and rules for designing structures corrosion protection (ÑÍèÏ 2.03.11–85);

    • in liquid environments with concentration of chlorides and sulfates of one level exceeding the existing Russian norms and rules for designing structures corrosion protection (ÑÍèÏ 2.03.11–85);

  • Increased thixotropy and time stable consistency of concrete mixtures which are not subject to segregation even while highly plastic.

Up



Research Institute for Concrete and Reinforced Concrete
Center for Modified Concrete
109428, Russia, Moscow, 2 Institutskaya, 6
Tel.: (095) 171–0573, 174–7635, 174–7629, 174–7606
Fax: (095) 174–7591
Å-mail:mb@niizhb.ru; info@master-concrete.com


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