The capillary porosity and Gel/Space ratio of a cement paste (mixture of cement and water) one year after mixing are 0.30 and 0.66. Determine the degree of hydration and w/c ratio initially used to make the cement paste.

The degree of hydration is 0.8571 or 85.71% while value of w/c is 0.608

Explanation:

As per given data Capillary porosity=P_c=0.3

Gel/Space ratio of  the cement paste is given as gs= 0.66.

Also

Here

Now

Now the  Gel/Space ratio is

Here

So the degree of hydration is 0.8571 or 85.71%.

Putting value of α in equation of w/c as

the value of w/c ratio is 0.608.

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