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IS 455:2015
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Clauses
IS 455:2015 — Clause Reference
5 detailed clauses with interactive calculators, reference tables, and practical notes.
Cl. 0
PSC Principle & Slag Proportion
IS 455 specifies Portland Slag Cement — OPC clinker blended with granulated blast-furnace slag (GGBS, conforming to IS 1…
Cl. 6
Chemical Requirements & Slag Content
IS 455 fixes the permitted slag content range in the blended cement and the chemical limits (SO₃, MgO, chloride, sulphid…
Cl. 7
Physical Requirements — Fineness, Setting, Soundness, Strength
IS 455 fixes the PSC physical acceptance — fineness, initial/final setting time, soundness (Le-Chatelier/autoclave) and …
Cl. B
PSC in Practice — Durable, Low-Heat, Curing-Dependent
Like all slag-rich binders, every PSC characteristic flows from the slow slag reaction: low heat of hydration (excellent…
Cl. S
Selecting PSC vs OPC vs PPC (Fitness for Purpose)
PSC is the right choice for severe sulphate/chloride exposure, mass and low-heat applications, and durability-governed w…
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