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IS 1489:2015
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Clauses
IS 1489:2015 — Clause Reference
5 detailed clauses with interactive calculators, reference tables, and practical notes.
Cl. 0
PPC Principle & Parts (Fly Ash vs Calcined Clay)
IS 1489 specifies Portland-Pozzolana Cement (PPC) — OPC clinker blended with a reactive pozzolana that consumes the lime…
1 table
Cl. 6
Chemical Requirements & Pozzolana Proportion
IS 1489 fixes the permitted proportion of pozzolana in the blended cement and the chemical limits (SO₃, MgO, chloride, l…
Cl. 7
Physical Requirements — Fineness, Setting, Soundness, Strength
IS 1489 fixes the PPC physical acceptance — fineness, initial/final setting time, soundness (Le-Chatelier/autoclave) and…
Cl. B
PPC in Practice — A Curing-and-Time Cement
Every PPC characteristic flows from one fact: the pozzolanic reaction is slow and needs moisture and time. Hence lower h…
Cl. S
Selecting PPC vs OPC vs Slag (Fitness for Purpose)
PPC is the right choice for durability-governed work, thicker/hot-weather pours and economy/embodied-carbon objectives —…
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