IS 8112:2013 — Clause Reference

OPC 43 Grade — Definition & Where It Fits

IS 8112 specifies 43-grade OPC — the minimum 28-day standard-mortar compressive strength is 43 N/mm² (IS 4031 on IS 650 …

Chemical Requirements (LSF, C₃A, MgO, SO₃, Chloride)

IS 8112 fixes the OPC 43 chemical limits: lime saturation factor and the alumina/silica moduli, C₃A (heat and sulphate-a…

Physical Requirements — Fineness, Setting, Soundness, Strength

IS 8112 fixes the OPC 43 physical acceptance: minimum fineness (Blaine specific surface, IS 4034), initial and final set…

Sampling & Acceptance Chain (IS 3535 → IS 4031 / IS 4032)

OPC 43 acceptance is valid only as a chain: define the lot, draw a representative composite sample per IS 3535, run the …

Selecting OPC 43 vs 53 vs PPC (Fitness, Not Grade Chasing)

IS 8112 OPC 43 is best understood by its selection logic: it is the general-purpose default; OPC 53 (IS 12269) is for wh…