SSC JE Civil Engineering 2018 Set 6 Solved Paper

Question : 107 of 200

Marks: +1, -0

What is the gel -space ratio of a sample of concrete, if the concrete is made with the 600 g of cement with the water-cement ratio of 0.65?

0.012
0.432
0.678
0.874

Validate

Solution:

Gel/space ratio is defined as the ratio of the volume of the hydrated cement paste to the sum of volumes of the hydrated cement and of the capillary pores. It relates strength more correctly than water/cement ratio.
Theoretical Strength = 240 × (gel/space)

^{3}

; where 240 represents the intrinsic strength of the gel in MPa for the type of cement and specimen used.
= 240 × (0.65)

^{3}

= 65.91 % or 0.65, Hence select closest correct answer i.e 0.678

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