High-alumina cement «CEMBOR»

High-alumina cements “CEMBOR-70” and “CEMBOR-73” are intended for manufacture of refractory middle-, low- or ultra-low cement concretes, stacked by vibration or self-spreading.

Technical characteristics

 Rate for grade
  CEMBOR-70 CEMBOR-73
Spec. 14-194-215-16

Mass fraction, %:

Al2O3, minimum

Fe2O3, maximum

CaO, minimum

SiO2, maximum

 

70

0,4

26

0,8

 

73

0,5

22

0,8

Compressive strength, N/mm2, 7 days period,minimum 50 50
Refractoriness, °С, minimum 1600 1700
Specific surface area, cm2/г, minimum 4500 4500

Settings time:

- beginning, minute, not earlier than

- end, minute, not later than

 

90

500

 

120

480

High-alumina cements “CEMBOR-70” and “CEMBOR-73” are intended for manufacture of refractory middle-, low- or ultra-low cement concretes, stacked by vibration or self-spreading.
Cements are widely used by JSC “BRP” for own needs at release of refractory concretes and concrete products. Cements of “CEMBOR” series represent refractory hydraulically hardened binding on the basis of synthetic calcium aluminates, which synthesis is made with application of highly-purity trace constituents.
Cements of “CEMBOR” series do not contain organic additives (dispersants, deflocculants, etc.) to avoid risk of occurrence of undesirable combinations in chemical composition with other elements.