GEOTECHNICAL ENGINEERING For a vibroflotation project, the following backfill material specifications must be satisfied Determine the suitability number, D25 and D30 Sorting Coefficient = 2 Uniformity Coefficient = 8 Coefficient of Gradation = 0.60 %3D D10 = 0.20 D75 D20 = 0 26 mm %3D Dso = 0 80 mm D30 - D25 = 0 22 mm 1. INPUT THE VALUE OF SUITABILITY NUMBER IN 2 DECIMAL PLACES 2 INPUT THE VALUE OF D25 IN MM AND IN 4 DECIMAL PLACES 3. INPUT THE VALUE OF D30 IN MM AND IN 4 DECIMAL PLACES

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Uniformly graded aggregate gradations have missing particles of one or more sizes. True False

The pressure exerted on a 100x100 mm cube will be than that of a 150x150mm cube if a constant force is applied to both samples. OA Lesser O B) None of the above OO Greater O D) Equal Curing of a concrete slab in hot weather may have to start after placing but before finishing. What method(s) can be used for this? (i) Fog sprays, (ii) Burlaps, (ii) Evaporation reducers, (iv) steam curing. O A) (iii) and (i) O B) (iv) and (i) OC (ii) and (ii) O D) (1) and (ii) High performance concretes typically have water-cementing materials ratios of 0.20 to 0.45. OA True O B) False What is commonly the most expensive "basic" ingredient used to produce concrete? OA) Portland Cement O B) Sand OO Coarse Aggregate O D) Fly Ash

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7 The specific gravity and absorption test (ASTM C128) was performed on fine aggregate and the following data were obtained:Mass of SSD sand = 500.0 gMass of pycnometer with water only = 623.0 gMass of pycnometer with sand and water = 938.2 gMass of dry sand = 495.5 gCalculate the specific gravity values (dry bulk, SSD, and apparent) and theabsorption of the fine aggregate

12. In a one-way slab 50% of the #8 tension epoxy coated bars are going to be spliced. At the location of the splice the ratio of area provided to area required is greater than 2. Determine the value of the splice length if the bars are spaced 6 inches on center and have a cover of 1.5 inches. Assume f'c = 4000 psi and fy = 60,000 psi.

A sieve analysis test was performed on a sample of aggregate and produced the results shown in Table P5.21. TABLE P5.21 Amount Sieve Size, Amount Sieve Size, mm Retained, g mm Retained, g 25 1.18 891.5 19 376.7 0.60 712.6 12.5 888.4 0.30 625.2 9.5 506.2 0.15 581.5 4.75 1038.4 0.075 242.9 2.36 900.1 Pan 44.9 Calculate the percent passing through each sieve. Plot the percent passing versus sieve size on: a. a semilog gradation chart, and b. a 0.45 gradation chart (Figure A.25). What is the maximum size? What is the nominal maximum size?

If a = 5 ft, locate the centroid (, ) of the composite area. (Figure 1) Figure 1.5 ft 1 ft -3 ft x 1 of 1 Part A Locate the centroid 7. Express your answer with the appropriate units. Submit Part B ΜΑ] y = Value Request Answer Locate the centroid 7. Express your answer with the appropriate units. Value Submit Request Answer Units < Return to Assignment [C] ? [PD ? Units Provide Feedback

SITUATION 1 For the figure shown, the diameter of holes is 20mm. Steel plate is made up of 10 mmw250mm wth staggered sections in the accompanying figure. Resistance tactbr for the yielcing limit state=0.9 Fy=248.8MPa, Fu=449.3M Pa Load Factors: DL=1.2, LL=1.6 Res istance factor for the fracture limit=0.75 1. Compute the netwidth for the plate in consideration for block shear. Use LRFD method a. A-B-E Path b. A-D-E Path c. A-C-D-E Path d. A-C-D Path 2. Compute the maximum design strength of the connection in relation to the answer in no.l 3. Compute the maximum value of service load T when A36 steel is usec, the live load us four times the dead load