Question 3: The following data will be used for Answers 29-32 engineer of record

Question

Question 3: The following data will be used for Answers 29-32 engineer of record decides to build the foundations on compacted fill. The results of a standard proctor test on the soil from Layer 2 (Question 2) are presented in Figure 2 In order to construct the foundations of Fayetteville High School, the geotechnical 00071(w3-0 539(w2 11.254) 29 130 R2 09995 101 100 Zero Air Voids 97 95 94 10 12 14 16 18 Water Content, w, (%) 26 Figure 2. Standard Proctor compaction curve for soil from Layer 2 29. The optimum water content is most nearly: (A) 13.5% (B) 14% (C) 15% (D) 15.5% 30. The maximum dry unit weight as calculated using the optimum water content from Problem 13 is most nearly: (A)100.30 lb (B) 100.53 lb (C) 100.63 lb (D) 100.52 lb 31. In the field the dry unit weight and moisture content as obtained from the nuclear gauge are 98 pcf and 14%, respectively. What is the relative compaction of the dam soil? (A)0.974 B) 97.4%/ (C) 95% (D) 90% ad roos

Explanation / Answer

29) Option C is correct. from graph it is most near to 15%.

30) Option C is correct. From Graph it is most near to 100.63 lb.

31) Option B is correct. Relative compaction is (dry unit weight obtained/maximum dry unit weight)*100

=(98/100.63)*100=97.4%

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