Can you also give a quick explanation on why you made your choice for each quest

Question

Can you also give a quick explanation on why you made your choice for each question, thanks

Consider the following mix designs: Mix C Mix A 280 120 190 700 900 0.48 Material Mix B 400 250 Cement (GP) Fly Ash (class F) Water Sand Stone W/C 190 700 900 0.48 150 800 900 0.6 Which mix should have the highest 28 day strength? a) Mix A b) Mix B c) Mix C Which mix should have the highest slump? a) Mix A b)Mix B c) Mix C d) Not enough information 8. 9. 10. Which, if any, mixes satisfy the requirements for class C exposure? a) Mix A b) Mix B c) Mix C d) None of them satisfy the requirements for class C exposure conditions

Explanation / Answer

(8) Answer:- (b) Mix B

High cement content in mix has high strength.

(9) Answer:- (a) Mix A

Fly ash increases slump of mix.

(10) Answer:- (a) Mix A

Class C exposure is for prevention of corrosion. By using fly ash in mix , we can prevent corrosion of reinforcement.

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