Main Data
See also
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 |
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.