// Technical Handbook · IS 456:2000
Field Guide:
Concrete on Site.
Order → place → cure. Everything site engineers need, in three stages. Skim, don't read.
01
Verify on arrival
Slump ±25 mm · temp <30 °C · within 90 min
02
Place right
Free fall <1.5 m · vibrate every 600 mm · no added water
03
Cure 14 days
Continuous moisture · sample 1 cube/5 m³
// Stage 01
Fresh Concrete
Ordering & delivery — first 90 minutes
★ Featured Tool
// Master Parameter
Water-Cement Ratio
Single biggest factor controlling strength & durability. Lower = stronger. Never add water at site.
- →Interactive lab: see strength, lifespan & defects change with W/C in real time
- →Includes IS 456 exposure table, grade ranges, and shareable comparison
// CRITICAL · Critical site rule
Never add water at site. If concrete is stiff, request a re-tempering admixture from Alpha — never water.
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