Bengal Cement Standard
Bengal Cement Standard is a high strength and durable blended Cement produced with the combination of high grade clinker, quality fly ash, quality slag and related additives.
Bengal Cement Standard classified under the CEM II/B-M,42.5 N complying with BDS EN 197-1:2003.
Technical Specification:
BDS EN 197-1:2003, CEM II/B-M,42.5N
ASTM C-595
CLINKER
SLAG, LIMESTONE & FLY ASH
GYPSUM
Bengal Cement Standard is a high strength and durable blended Cement produced with the combination of high grade clinker, quality fly ash, quality slag and related additives.
Bengal Cement Standard classified under the CEM II/B-M,42.5 N complying with BDS EN 197-1:2003.
BENGAL STANDARD COMPOSITE CEMENT
TEST RESULT (ASTM METHOD)
| Test | Age | Standard Requirements (ASTM C595) | BUET Test Result Bengal Cement Standard |
|---|---|---|---|
| Physical Parameters | |||
| Compressive strength (psi) – 3days | 3 Days | 1890 | >2300 |
| Compressive strength (psi) – 7days | 7 Days | 2900 | >3200 |
| Compressive strength (psi) – 28days | 28 Days | 3620 | >4500 |
| Setting time (min) | Initial | >45 | 150-170 |
| Setting time (min) | Final | <420 | <380 |
| Fineness (cm2/ gm) | Not mentioned | >4000 |
Benefits of Bengal Cement Standard
Blended cement has a lower heat of hydration than Ordinary Portland Cement (OPC). In mass concrete placements the excess internal heat may contribute to cracking. The use of fly ash and slag in blended cement greatly reduced the heat buildup and reduces external cracking.
Cement with fly ash and slag reduces the heat of hydration, giving reduced temperature differences within concrete structures. This is especially useful for hot weather concreting as it will minimize or prevent micro thermal cracking, thus avoiding the corrosion of embedded steel reinforcement.
Reduces the permeability and water absorption of concrete through fly ash and slag.By reducing the permeability of chloride on ingress, corrosion of embedded steel is greatly decreased .Also improving chemical resistance reducing the permeability and absorption.
While the penetration of chlorides is a common cause for the premature deterioration of concrete structures, the use of fly ash cement greatly reduces the chloride permeability of concrete,giving reinforced concrete structures impressive durability.
Fly Ash & Slag are mostly spherical, providing greater workability of the concrete and lowering of water requirement for the same concrete consistency. Pumpability is greatly enhanced.
Consumes fly ash for its production, which will help to make our country cleaner. It is identified as a Green product and will significantly reduce the energy used for cement manufacturing.
Bengal Cement Standard consumes fly ash for its production,which will help to make our country cleaner. Sometime it will significantly reduce the energy used for cement manufacturing.Therefore Bengal Cement Standard is greener than other cements.
Silica rich class F fly ash is used in Bengal Cement Standard to significantly increase sulphate and chloride resistance and Alkali Aggregate Reaction (ASR) resistance to the concrete mixture.
Bengal Cement Standard is recommended for:
- High rise building structural elements such as concrete columns, walls, lift shafts and beams.
- Concrete which needs to be pumped on to higher elevations and need long term slump retention.
- Mass concrete structures where heat of hydration effect is high.
- Concrete structures exposed to seawater (harbor, jetty, bridges, building etc.)
