Civil Engineering MCQJE Level Civil Engineering
The water-cement (w/c) ratio most directly affects which property of hardened concrete?
Building MaterialsBuilding MaterialsEASY
Choose the correct answer
A
Workability
B
Setting time
C
Compressive strength (inverse relationship)
D
Colour
Correct Answer
C. Compressive strength (inverse relationship)
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Compressive strength: lower w/c → denser hydrated cement paste → fewer capillary pores → higher strength (Abrams'' water-cement ratio law). Every 0.05 reduction in w/c adds roughly 5–7 MPa strength. W/c also affects durability and permeability.
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