About this code
Specification for PPC where fly ash is the pozzolanic material (15-35% replacement). Lower heat, better durability, popular for marine and large pours.
Key sections
- 01Scope
- 02Composition (fly ash 15-35%)
- 03Chemical and physical requirements
- 04Sampling
Critical clauses
Clause 5.1Composition
Fly ash content 15-35% by mass.
In practiceVerify mill certificate for actual fly ash %.
Clause 6.1Compressive Strength
Min 16/22/33 MPa at 3/7/28 days.
In practiceSlower strength gain — extend curing to 14 days.
Practical implications
For specifiers
Default for marine/sulphate exposure.
For suppliers
Bangalore fly ash readily available.
For executors
Extend curing — slower 7-day strength.
FAQs
Is PPC suitable for all RCC?
Yes for general RCC. Avoid for early form-stripping or fast-track.
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