Quality Report for Mir PCC & OPC
Mir Cement meets all the necessary quality standards from Bangladesh University of Engineering and Technology (BUET).
- Quality report for Mir Portland Composite Cement (PCC)
As per the BUET test repot, the Comprehensive Strength of Mir PCC is over 5800 PSI
- Quality report for Mir Ordinary Portland Cement (OPC)
The BUET test report exhibits that the Comprehensive Strength of Mir OPC is above 6100 PSI
- ISO Certification
Mir Cement Ltd. is an ISO certified company
Lab Facilities
Mir Cement Ltd. has its own laboratories. These are equipped with the latest testing equipment and staffed with qualified chemists and skilled technicians who work 24 hours a day in 3 hours shifts, in accordance with guidelines laid down by BSTI, to ensure that every batch conforms to EN specifications. In addition, Mir Cement Ltd. sends samples to BUET laboratories for independent testing every month.
Testing Procedure
Samples for imported raw materials (clinker, gypsum, blast furnace slag) are tested before an L/C is opened. Only those that conform to our standards are ordered.A second test is carried out once raw materials arrive on-site for both imported and locally procured raw materials (Fly Ash, Lime Stone)If the raw materials pass the test they are then sent to the laboratory mini Ball Mill in different ratios to make fine cement of different qualities which are again tested. The best one is chosen for mass production in the mill.Once production begins, samples of work in progress are collected every hour for the following tests
1. Blain Fineness
2. Residue
3. Initial and final setting time
Additionally, the following tests are carried out at regular intervals
4. Compressive strength test on days 2 and 28 as per EN standards
5. Compressive strength test on days 3, 7, and 28 as per ASTM standards
Extreme care is taken to prevent the hydration of cement, which may result in loss of strength. Once bagged, cement is delivered instantly to the customer to reduce the chance of hydration.Lastly, a lot of attention is paid to the feedback system on quality from the user level via the marketing department which enables the quality control and operation department to take proper steps to maintain consistency of quality.
Quality Checking Points
Mir Cement Ltd. ensures the quality of its products by performing the following tests
- Compressive strength
- Initial setting time
- Soundness (expansion)
- Loss on ignition
- Insoluble residue
- Sulphate content
- Pozzolanicity
- Ammonia content
- Silicate content