Computer · Concrete Technology
Which statement accurately differentiates the strength development of OPC and PPC during the compressive strength test according to IS 4031 (Part 6)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1PPC must attain superior 3-day strength compared to OPC due to the enhanced hydration facilitated by pozzolanic action during the initial phase.
- 2OPC cannot be tested using standard mortar cubes and therefore requires concrete cubes for obtaining reliable compressive results.
- 3OPC and PPC both require identical 7-day strength targets, as early-age strength limits are specified without variation.
- 4PPC generally shows lower early-age strength than OPC but may reach equal or higher strength at 28 days due to gradual pozzolanic action.✓
Correct answer
PPC generally shows lower early-age strength than OPC but may reach equal or higher strength at 28 days due to gradual pozzolanic action.
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