Questions - Page 16n

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Bite or grit test

Intermediate Engineering

Mix Design: Concrete and Asphalt

QUESTIONS

Q1. The purpose of a geological survey is to take which of the following actions?

1. Locate rock formations in the field and determine their physical characteristics

2. Determine rock age and distribution

3. Determine types of rock and their mineral content

4. All of the above

Figure 16-9.Sieve analysis data.

Q2.    Is it true or false that surveys made in support of pedology concern the locations of the limits of sand or gravel deposits suitable for use as construction materials?

Q3.    Structures must be constructed at an elevation that will ensure that they will not be adversely affected by the groundwater table. If the proposed grade line lies below the elevation of the groundwater line, you may have to

1. change the location

2. lower the groundwater table by means of artificial drainage systems

3. raise the proposed grade

4. do either 2 or 3 above, depending upon land characteristics

Q4.    From the sieve analysis data shown in figure 16-9, determine and plot the grain size distribution using figure 16-10. For this soil sample, what is the (a) percentage of gravel, (b) percentage of sand, (c)percentage of fines, and (d) the USCS classification?

Figure 16-10.Grain size distribution graph.

Figure 16-11.Atterberg limits determination.

Q5. For a certain soil sample, assume that 60 percent of the material passes the No. 200 sieve, that there is no indication that the material contains organic matter and that Atterberg limits testing has been performed Figure 16-11 is the partially completed record entries for the Atterberg limits determination. Based on this information and using the plasticity chart shown in figure 16-3, what is the (a) liquid limit, (b) plasticity index, and (c) USCS classification of the soil sample?

Q6. Which of the following field tests can be used to approximate the cohesive and plastic characteristics of a soil sample?

1. Dry strength

2. Ribbon

3. Roll

4. Each of the above

A1. 4.

A2. True.

A3. 4.

A4. (A) 21.18 ercent, (B) 74.25 percent, (C) 4.57 percent, (D) SP.

A5. (A) LL = 43, (B) PI = 18, (C) CL.

A6. 4.