Read the statements given below and choose the correct option:
I. The water-cement ratio influences both the strength and durability of concrete.
II. Increasing water-cement ratio increases concrete strength.
Statment I is correct because the water cement ratio is a crucial factor that influences
both the strength and
durability of concrete as strength of concrete primarily depends upon the strength of
cement paste and
strength of cement paste depends on dilution of paste (or) strength of paste increases
with cement content
and decreases with air and water content.
As per Duff Abrahm's Law: It is evident that strength of concrete depends only upon w/c ratio provided the mix is workable.Stregnth at 28 days (S) = A/BX
Where
A = 98.4 N/mm2
B = 7
X= w/c ratio by volume
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