👉What is FM in Sieve Analysis? 🤔
💫FM = Fineness Modulus – it’s an index number representing the average particle size of aggregate.
🚧It’s calculated by adding the cumulative % retained on standard sieves and dividing by 100.
🔍 Effect of FM on Concrete:
⏺Higher FM → Coarser aggregate → Less water demand, but may reduce workability.
⏺Lower FM → Finer aggregate → Higher water demand, better workability but more shrinkage.
✅ Ideal FM Range for Sand: 2.3 – 3.1 (for good concrete mix)
⚠ Too high or too low FM can affect strength, durability, and finishing of concrete.
#CivilEngineering #SieveAnalysis #FinenessModulus #ConcreteMixDesign
@etconp
💫FM = Fineness Modulus – it’s an index number representing the average particle size of aggregate.
🚧It’s calculated by adding the cumulative % retained on standard sieves and dividing by 100.
🔍 Effect of FM on Concrete:
⏺Higher FM → Coarser aggregate → Less water demand, but may reduce workability.
⏺Lower FM → Finer aggregate → Higher water demand, better workability but more shrinkage.
✅ Ideal FM Range for Sand: 2.3 – 3.1 (for good concrete mix)
⚠ Too high or too low FM can affect strength, durability, and finishing of concrete.
#CivilEngineering #SieveAnalysis #FinenessModulus #ConcreteMixDesign
@etconp
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