2) Review the attached mix design sheet and answer the following questions a. Wh

Question

2) Review the attached mix design sheet and answer the following questions a. Why it is important to report results at Nini, Ndesign and Nmax Basically, tell me what does each one of these properties mean? b. What is the nominal maximum aggregate size for the mixture? c. What is the maximum aggregate size for the mixture? d. Based on the aggregate gradation given, what is the mixture type? e. Which volumetric property that is indicative of binder film thickness on the surface of the aggregate? What is this value of this property? f. Which property assured us that the mix will have sufficient air voids after 7-10 years in service? What is the air voids percentage for this property? g. Which aggregate test told us that it met the toughness criteria? What is this value? h. Why did we use 1% of hydrated lime in the composite aggregate gradation?

Explanation / Answer

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A a] It is important to always take the readings at initail, design and maximum condiotions because it gives us the range of the values within which the quantities as well the dependent quantities fluctuates.

A b] Maximum size of aggregate is 12.5 mm or 0.5 '' .

Nominal size of aggregates is 15 mm

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