Maha Cement - Portland Pozzolana Cement (PPC)
Maha – Portland Pozzolana Cement (PPC) is a premium blended cement manufactured by inter-grinding the high-quality clinker with superfine processed fly ash. The clinker used here is specially made with a high percentage of Tricalcium Silicate C3S (58-60%). Only high-quality fly ash from select chambers of Electrostatic Precipitators (ESPs) are extracted and transported in closed bulkers is used to manufacture Maha Cement. Clinker and fly ash with a desired proportion of gypsum is inter-ground in high-efficiency closed-circuit Ball Mills. The “O-Sepa” and SKS separators used in the mills enable us to maintain high fineness (about 350 m2/kg) and good particle size distribution (PSD). Maha Cement thus manufactured surpasses the compressive strength requirement of OPC 53 grade at 3, 7 and 28 days while enabling you to get excellent durability in concrete.
| Physical Requirements | Requirement as per lS1489 | MAHA CEMENT PPC | |
| (Part-1) : 1991 | |||
| Fineness | Specific Surface (m2/kg) | 300 (min) | 330-600 |
| Setting Time | a. Initial minutes) | 30 (min) | 160-200 |
| b. Final (minutes) | 600 (max) | 270-300 | |
| Soundness | Expansion of unaerated cement | ||
| a. By LeChatelier Method (mm) | 10 (max) | 0.5-1.5 | |
| b. By Auto Clave (%) | 0.8 (max) | 0.06-0.1 | |
| Compressive Strength | a. 72 ± 1 hr i.e. 3 days (M Pa) | 16 (min) | 23-26 |
| b. 168 ± 2 hr i.e. 7 days (M Pa) | 22 (min) | 32-36x | |
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