Engineering College

An aggregate blend is composed of 55% aggregate A (Sp. Gr. 2.631), 25% aggregate B (Sp. Gr. 2.331) and 20% sand (Sp. Gr. 2.609). The Sp. Gr. of the blend aggregate is most nearly:_______

a. 2.732
b. 2.545
c. 2.581
d. 2.614

Answers

Answer 1

Answer:

The right choice would be Option b (2.545).

Explanation:

The given values are:

The aggregate blend will be:

[tex]W_A[/tex] = 55%

[tex]G_ A[/tex] = 2.631

[tex]W_ B[/tex] = 25%

[tex]G_B[/tex] = 2.331

[tex]W_C[/tex] = 20%

[tex]G_C[/tex] = 2.609

Now,

On applying the formula, we get

⇒ [tex]G_{BA}=\frac{W_A+W_B+W_C}{\frac{W_A}{G_A} +\frac{W_B}{G_B} +\frac{W_C}{G_C}}[/tex]

On substituting the values, we get

⇒          [tex]=\frac{55+25+20}{\frac{55}{2.631} +\frac{25}{2.331} +\frac{20}{2.609}}[/tex]

⇒          [tex]= \frac{100}{\frac{55}{2.631} +\frac{25}{2.331} +\frac{20}{2.609}}[/tex]

⇒          [tex]=2.545[/tex]

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Answers

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