About this code
Specification for SRC with low C3A content (<5%) for use in sulphate-rich environments — coastal soils, sewage works, industrial floors.
Key sections
- 01Scope
- 02Chemical limits (C3A < 5%)
- 03Physical requirements
- 04Testing
Critical clauses
Clause 5.1C3A Limit
Tricalcium aluminate <= 5%.
In practiceCritical for sulphate resistance.
Clause 6.0Strength
Comparable to OPC 33-43.
In practiceUse only where sulphate exposure is verified.
Practical implications
For specifiers
Test soil sulphate before specifying.
For suppliers
Made-to-order in most markets.
For executors
Same handling as OPC.
FAQs
When is SRC required?
When sulphate in soil > 0.2% or in groundwater > 300 mg/L.
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