| S.No. | Field / Checkpoint | Reference | Status |
|---|---|---|---|
| A. DAILY ENTRY | |||
| A1 | Date + cement brand + grade (43 / 53) Acceptance: Logged | Per supplier + IS 269 / IS 12269 | OK NC NA |
| A2 | Opening bags + receipts + issues + closing bags Acceptance: Bin card tally | Daily balance | OK NC NA |
| A3 | Element / pour for which issued Acceptance: Per pour record | Traceable per pour | OK NC NA |
| B. MONTHLY ANALYSIS | |||
| B1 | Total cement consumed (bags / tonnes) Acceptance: Computed | Sum | OK NC NA |
| B2 | Theoretical consumption per BOQ (kg/m³ × m³ poured) Acceptance: Theoretical calculated | M25 ≈ 380 kg/m³ | OK NC NA |
| B3 | Wastage % = (Actual − Theoretical) / Theoretical × 100 Acceptance: Within tolerance | Typical 2-5% | OK NC NA |
| B4 | If > 5% — investigation + corrective action Acceptance: RCA done | Pilferage / mix waste | OK NC NA |
Cement is the single most-expensive consumable on most Indian construction projects — 8-15% of total construction cost. A typical residential building consumes 30-80 bags of cement per m² of built-up area; a G+10 commercial tower can consume 50,000-200,000 bags. At ₹400-450/bag, that's ₹2-9 crore of cement per project.
Without a dedicated register, cement pilferage is rampant: cement bags vanish on the way from store to site, get diverted to side jobs, or get over-issued and consumed inefficiently. The Cement Consumption Register tracks every bag from receipt to final concrete placement — enabling reconciliation against BBS, mix design, and actual placement records.
Material reconciliation standards (CPWD, ISO 9001): cement variance should be ≤ 2-3% of theoretical consumption. Variances above 5% trigger investigation.
Per-day entry: - Date + cement type (OPC 33 / OPC 43 / OPC 53 / PPC / PSC) + brand - Receipt: bags received from stores; cumulative receipts - Issue: bags issued to crews + activity reference (which pour / which mix) - Mix design ratio used (1:1.5:3 for M25, 1:1:2 for M30, etc.) - Concrete grade poured (M20 / M25 / M30 etc.) - Concrete volume poured (m³) - Theoretical consumption = volume × cement-per-m³ per mix design - Actual consumption = bags issued × 50 kg/bag - Variance = (Actual − Theoretical) / Theoretical × 100 - Wastage notes (spillage, dampened bags, rejected)
Typical cement consumption by concrete grade: - M15: 290-310 kg/m³ (~6 bags/m³) - M20: 320-350 kg/m³ (~6.5-7 bags/m³) - M25: 350-380 kg/m³ (~7-7.5 bags/m³) - M30: 380-420 kg/m³ (~7.6-8.4 bags/m³) - M35: 410-450 kg/m³ (~8.2-9 bags/m³) - M40+: 430-480 kg/m³ (~8.6-9.6 bags/m³)
Monthly reconciliation: cement-in vs cement-consumed vs cement-stock. Any anomaly investigated immediately.
1. Bag-count errors — manual counting at delivery is error-prone; recount mandatory.
2. Pilferage — bags diverted on transit; check via delivery slip vs goods received note (GRN).
3. Damp / cement clumping — wet storage causes cement to harden; bags become unusable. Document loss; investigate storage practices.
4. Over-issue to crew — site engineer indents 50 bags for an activity needing 40; excess consumed wastefully OR pilfered. Activity-level reconciliation flags this.
5. Wrong mix design used — crew uses richer mix than designed (more cement than spec); register shows variance.
6. No theoretical baseline — register without expected consumption per pour cannot identify pilferage.
7. Cement-substitute mix-up — fly ash (PPC) used instead of OPC; quantity per m³ similar but properties differ. Register entry must specify cement type.
8. Long-term storage — cement that sits > 90 days loses strength; should be retested before use. Register tracks vintage.
Companion formats: - Stores Inward Register (FMT-STR-009) — central receipt log - Issue Voucher (FMT-STR-003) — material issued to crews - Bin Card (FMT-STR-005) — cement bin running stock - Material Reconciliation Register (PMC-PRC-REG-009) — periodic reconciliation - Daily Concrete Pour Register (FMT-SIT-015) — pour-level cross-reference
Codes: - IS 269:2015 — OPC 33 / specification of OPC cement - IS 8112:2013 — OPC 43 grade - IS 12269:2013 — OPC 53 grade - IS 1489:2015 — Portland Pozzolana Cement (PPC) - IS 455:2015 — Portland Slag Cement (PSC) - IS 10262:2019 — Concrete mix design - IS 456:2000 — RCC code