BIR CEMENT (OPC)
PRODUCTION TECHNOLOGY AND QUALITY UNIQUENESS
Bir Cement has the most modern laboratories in its both plants. Samples from each batch are tested on hourly and daily basis for quality assessment. The quality parameters are strictly monitored from production to delivery process. The best quality raw materials, modern production technology and advanced testing equipment enable Bir Portland Cement to maintain quality consistency.
The plant operation is very essential to be at the constant and optimal condition. And best quality raw materials and advanced technology can assure that. Vertical Roller Mill (VRM) is the most advanced technology in cement production method. It provides high fineness and better Particle Size Distribution (PSD) of the finished product, ensuring the better blending properties and faster setting of Bir Cement. VRM is environment-friendly, emitting less CO 2 and consuming less energy.
Higher Early Strength, Faster Setting
Tricalcium silicate (C 3 S) and dicalcium silicate (C 2 S) contribute most to the eventual strength. C 3 S contributes more to the early strength within the first 24 hours and C 2 S takes place after 7 days. This strength increases gradually and reaches higher strength values. Initial setting of Portland cement is due to tricalcium aluminate (C 3 A) and Tetracalcium Aluminoferrite (C 4 A). They hydrate quickly, and contributes to faster setting of concrete.
Resistance to Cracking and Shrinkage
Tricalcium aluminate (C 3 A) is responsible to generate heat and this may cause hair-line crack in the concrete. Bir OPC has low percentage of C 3 A that generates less heat and ensures higher ultimate strength. Therefore, the concrete achieves great resistance to cracking and shrinkage.
Moderate Sulphate Resistance
OPC is typically used in concrete exposed to moderately aggressive sulphate environments where concrete comes in contact with soil and groundwater containing moderate sulphate content. A limitation on the composition is that the (C 3 A) shall not exceed 8%, which reduces its vulnerability to sulphates.