IS 1489:2013 Part 1 is the Indian Standard (BIS) for portland pozzolana cement - specification - part 1: fly ash based. This standard specifies the manufacturing, chemical, and physical requirements for fly ash-based Portland Pozzolana Cement (PPC). It sets quality limits for ingredients, strength development, setting times, and durability to ensure reliable performance in construction.
Specifies requirements for fly ash based portland pozzolana cement for general construction purposes.
Overview
- Status
- Current
- Usage level
- Essential
- Domain
- Materials Science — Flooring and Paving
- Type
- Specification
Also on InfraLens for IS 1489
Practical Notes
! PPC gains strength slower than OPC in the initial days but achieves similar or higher ultimate strength at 90 days due to secondary pozzolanic reactions.
! Extended and continuous curing is highly critical for PPC compared to OPC to prevent surface cracking and ensure full pozzolanic action.
! Highly recommended for mass concreting and marine environments due to its lower heat of hydration and superior resistance to sulphate attack.
Frequently referenced clauses
cementpozzolanafly ashconcrete
International Equivalents
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Key Values8
Quick Reference Values
Fly ash content range15% to 35% by mass
Minimum initial setting time30 minutes
Maximum final setting time600 minutes
Minimum fineness (Blaine specific surface)300 m²/kg
Minimum compressive strength at 3 days16 MPa
Minimum compressive strength at 7 days22 MPa
Minimum compressive strength at 28 days33 MPa
Maximum magnesia (MgO) content6.0%
Tables & Referenced Sections
Key Tables
Table 1 - Chemical Requirements
Table 2 - Physical Requirements
Key Clauses
Clause 5 - Raw Materials
Clause 6 - Physical Requirements
Clause 7 - Chemical Requirements
Clause 9 - Packing
Clause 10 - Marking
Frequently Asked Questions3
What is the permissible range of fly ash in PPC?+
It must be between 15% to 35% by mass of the cement.
What is the minimum 28-day compressive strength of PPC?+
The minimum required 28-day compressive strength is 33 MPa (equivalent to OPC 33 grade).
Can PPC be used for RCC works?+
Yes, it is highly suitable for RCC works, provided curing time is appropriately maintained and formwork removal is adjusted for slower initial strength gain.
QA/QC Inspection Templates
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