Laboratory 4

Show calculation on how to determine the average coefficient of permeability of the sand sample at 20°C. Also show calculations on how to determine the discharge the K1 and Average K1

3- A sand sample is subjected to drainage cutting test with a hollow cylinder device. Rupture occurs with increasing internal pressure while external pressure is constant. At the moment of rupture, the external stress is 200 kPa and the internal stress is 300| Kilopascals - be. Internal and external radii of the sample are 40 and 60 mm. A) Obtain the angle of soil friction. B) At the moment of rupture, what is the axial stress applied to the sample?

A series of identical samples have been tested with drained triaxial test and some of the values are given in the tabulated table 3(Below). Calculate the remaining values as in the blank box. PARAMETER |cell pressure, o3 (kPa) total axial stress, 01 (kPa) pore pressure at failure, u¡ (kPa) |change in volume, Av effective cell pressure, o3' (kPa) effective total axial stress, o,' (kPa) |difference in stress, q (kPa) CD test 150 284 i 1.8 ii i iv O i = 134; ii = 16; iii = 150; iv = 0 O i = 134; ii = 284; iii = 150; iv = 0 O i = 0; ii = 16; iii = 150; iv = 134 O i = 0; ii = 150; iii = 284; iv = 134

Table Q3(c) presentssamples information for point load test. Based on the data: (i) Calculate the Unconfined Compression Strength for sample A and B. (ii) Classify the strength of sample A and B based on Bieniawaski 1975 classification as given in Table Q3c(ii). (iii) As an engineer, define the reason of strength classification of sample A and B.

The following results were obtained from a liquid limit test on a clay using the Casagrande cup device. Number of blows 12 20 28 32 Water content (%) 52.5 47.1 43.2 38.6 37.0 Two determinations for the plastic limit gave water contents of 22.8% and 23.2%. Determine (a) the liquid limit and plastic limit, (b) the plasticity index, (c) the liquidity index if the natural water content is 38% and (d) the void ratio at the liquid limit if G, = 2.7. (e) What is the soil state in the field? (f) Do you expect a brittle type of failure for this soil?

My courses SOIL MECHANICS Summative Assessment MIDTERM EXAM-QUIZ 2 FOR CE 17 CEIT-02-601P Time left 1:24:01 Water flows at the rate of 0.09 ml/s in an upward direction through a sand sample with a coefficient of permeability of 2.7 x 10^-2 mm/s. The thickness of the sample is 120mm and the area of cross-section is 5400 mm2. Taking the saturated unit weight of the sand as 18.9 kN/m3, determine the effective pressure in Pa at the middle of the sample. O a 182 O b. 910 O C. 364 O d. 728 SHOT ON POCO F3

A sand cone test has been performed in a compacted fill performed on a soil sample. The test results were as follows: Initial mass of sand cone apparatus w/ sand -------------- 5.912 kg Final mass of sand cone apparatus w/ sand --------------- 2.378 kg Mass of soil recovered from hole ----------------------------- 2.883 kg Moisture content of soil from hole --------------------------- 7% Density of sand ---------------------------------------------------- 1300 kg/cu.m Volume of cone below valve------------------------------------ 1.114 x10 -3 cu.m Max. dry unit weight ---------------------------------------------- 19KN/cu.m   Compute: The moist unit weight The dry unit weight The relative compaction

Testing Procedure for the Sand Equivalent Test.

Outline the practical reasons why field permeability tests to obtain a value for coefficient of permeability might be preferred over the laboratory testing method.

In a falling head permeability test the following data was recorded for a soil sample having a diameter of 150mm and a length of 200mm.        Standpipe diameter is 9mm.                                                    Initial standpipe level (h1) ----- 1200mm ------ 900mm          Final standpipe level (h2) ------ 900mm ------- 750mm        Time interval (t2 – t1) ---------- 65 sec --------- 41 sec Compute the average value of the coefficient of permeability. Thank you!

Afalling head permeability test was performed on a sample of clean uniform sand. The initial hydraulics head was 900 mm, the final head was 400 mm, 60 sec were required for the water level in the standpipe to fall. The cross-sectional area of the standpipe was 100 mm2. The sample was 40 mm in diameter and had a length of 180 mm. Determine the coefficient of permeability in Darcy's Law.

"ll zain IQ قسم الهندسة المدنية - ميكانيك التربة - ... docs.google.com The sieve analysis has been 0/4 conducted on a soil sample and it was found that the percentage of passing from sieve number 200 is 100%. Also, the results of the liquid limit and plastic limits tests are shown in the image below. Using these information then the classification of this soil in accordance with the AASHTO system is Number of Mass of the Mass of the can + Mass of the can + blows can (g) wet soil (g) dry soil (g) 20 22.23 25.73 24.90 25 23.31 29.3 28.10 30 21.87 28.56 27.40 Number of Mass of the Mass of the can + Mass of the can + trials can (g) wet soil (g) dry soil (g) 1 23.00 28.00 27.50 2 23.00 28.20 27.70 3 23.00 27.50 27.00

A 627-g sample of sand was found to have the following amounts of material retained on each sieve/pan: 3/8 in. = 22 g, No. 4 = 45 g, No. 8 = 96 g, No. 16 = 122 g, No. 30 = 163 g. No. 50 86 g, No. 100 = 51 g, No. 200 = 30 g, pan = 11 g a. Calculate the fineness modulus of the sand. b. Is this sieve analysis valid for acceptance purposes? Explain why. c. Does the sand meet the particle size criteria of ASTM C 33. Fully justify your answer (list and check all relevant criteria from ASTM C33)

****PROVIDE STEP BY STEP SOLUTION SOLVING H1 AND H2 VALUES in part B***** A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results.  b) A falling head test is conducted on the same soil specimen at the same time  (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values, provide step by step solution solving h1 and h2 values.

The permeability of moulding sand was determined using a standard AFS sample by passing 2000 cc of air at a gauge pressure of 10 g/cm² If the time taken for the air to escape was 1 min. Find out the permeability number.

Task 1. Compaction test Table 1 Results of compaction test Run No Mass of sample and cylinder (g) Mass of cylinder (g) 1 2 3 4 6022 6052 6102 6074 6015 4200 4200 4200 4200 4200 Can No 12 08 F3 F4 F5 Tare mass (g) Wet mass gross (g) Dry mass gross (g) 31.12 31.04 31.31 30.83 31.53 80.17 97.9 93.68 84.28 108.81 79.07 95.71 89.93 79.91 101.29 Table 1 shows the results of compaction test on soil sample. (1) Describe the test procedure of compaction test. (2) Calculate water content and dry density in each run. (3) Plot the dry density-water content curve and zero air void line. (4) Determine the maximum dry density and optimum water content.

The following results were obtained from a liquid limit test on a clay using the Casagrande cup device. Number of blows Moisture content (%) 6 12 20 28 32 52.5 47.1 43.2 38.6 37.0 a) Determine the liquid limit b) If the natural water content is 38% and the plastic limit is 23%, calculate the liquidity index. c) Would you expect a brittle failure? WHY?

Show calculation on how to determine the average coefficient of permeability of the sand samplea at20°C.

mpt=541762&cmid%3D103601 Marks 25 Question 1 A sample of AL Batina soil tested in the laboratory. The gradation analysis results are as shown in table Q1. The Atterberg limit tests indicate that the liquid limit is LL = 30% and the plastic limit is PL=27%. Table Q1 Sieve No.# Sieve size (mm) Finer (%) 4 4.75 90 8. 2.36 84 16 1.3 60 30 0.6 30 50 0.2 10 200 0.075 8 i. Determine the uniformity coefficient Marks] ii. Determine curvature coefficient [5 [5 Marks] iii. Classify AL Batina soil according to Unified Soil Classification System (USCS). [10 Marks] iv. Determine the group symbol and group name Marks) [5

SOIL MECHANICS – HOMEWORK PART-3 Q1 Data obtained from a laboratory consolidation test are tabulated as follows: Test points 3 4 5 o' (kPa) Total AH (mm) 20 50 100 200 400 800 0.23 0.87 1.90 3.62 5.55 7.25 G=2.70, Họ= (initial thickness at zero pressure) = 22.5 mm, w = (moisture content at the beginning of the test) = 0.78. Plot the e-logo curve and calculate Ce. Ae C. = log a¡ – logo, log(oʻ /o,) Ho AH Hint: and Q2 An open layer of clay 4 m thick is subjected to loading that incereases the average effective vertical stress from 185 kPa to 310 kPa. Determine: (a) the total settlement, my = 0.00025 m“/kN, cy = 0.75 m² AH / Ho m, = Ae/(l + €g) or m, = (6.4) From this definition we can find the consolidation settlement for a layer of thickness H: Hint: S̟ = AH = m,H(o¡ -6) (6.5) Q4 A surface load of 60 kPa is applied on the ground surface over a large area. The soil profile consists of a sand layer 2 m thick, the top of which is the ground surface, overlying a 4 m thick layer of clay. An…

A flexible steel platform has a footprint of 75 feet by 75 feet and supports equipment having a total weight of 2,250 kips. The platform is located at the ground surface. The soil profile below the platform consists of 30 feet of stiff clay over bedrock. The groundwater table is located 5 feet below the ground surface. The clay has a unit weight of 120 pcf above the water table and 125 pcf below the water table. Laboratory consolidation test results for a sample of the clay at a depth of 15 feet below the ground surface reveal a preconsolidation stress of 2,400 psf, compression index of 0.5, recompression index of 0.1 and initial void ratio of 0.66. Assume the bedrock is incompressible. Part A Plot effective vertical stress versus depth (to scale) before and after installation of steel platform and equipment. Part B Calculate the primary consolidation settlement at the center of the platform and at the corner of the platform AND report the differential settlement between these two…

4 7 l. 12:33 التدرج الحبيب. . . HW1 HOMEWORK 1 We made sieve analysis for a soil sample, we had these results, complete the table. Sieve opening Wt. retained on Accumulative wt. % of Sieve no % of passing wt. (mm) 4.76 each sieve (gm) (gm) accumulative wt #4 2.38 #20 0,84 88.5 #40 0.42 77.9 #100 0.149 161.6 4200 0.074 29 pan 67.6

4. Select the correct answer: 1-Porosity is directly proportional with: a) Sample bulk density, Solid volume, and Void ratio of a sample b) Voids volume, Water content c) Solid volume, Void ratio, Total Volume, and Sample solid density d) None

Q1 Data obtained from a laboratory consolidation test are tabulated as follows: Test points I 2 3 4 5 o' (kPa) Total AH (mm) 20 50 100 0.23 0.87 L.90 3.62 5.55 7.25 200 400 800 G,=2.70, Ho= (initial thickness at zero pressure) = 22.5 mm, w = (moisture content at the beginning of the test) = 0.78. Plot the e-logo' curve and calculate Ce Ae I+eo Ho log a - logo, log(o /06) ΔΗ Hint: and

According to AS 1726, specify the symbols and generic names used for coarse,medium and fine grain sands

The figure and the table below, shows the results of consolidation test for a soil sample, Find the cc value. TI Applied pressure, kPa 25 50 100 200 400 800 Voids ratio 0.634 0.619 0.583 0.523 0456 0383 0.65 0.6 0.55 0.5 0.45 0.4 of 0.35 10 100 1000 PRESSURE 0.15 0.21 0.12 no one 0.30 VOIDS RATIO

A 1000g of sand has been soaked for at least 24hours prior to lab. After drying the sample to saturated surface dry condition, the samples were split into two and put in tare cans. Can1+sample weigh 800g and can2+sample weigh 300g. Can1+sample was used for determining the specific gravity, where volume of water displaced in flask is 320cc. Can2+sample was used for determining the oven-dry weight which resulted to 280g. If the weight of can 1 and 2 is 5g and 6g respectively, determine the Absorption capacity and specific gravity of sand.

A liquid limit test on a clay was performed with the following results. The natural water content of the clay is 38% and plastic limit is 21%.   Number of Blows 6 12 20 28 32 Water content (%) 52.5 47.1 42.3 38.6 37.5   What is the liquidity index of this clay? (Use Interpolation) Group of answer choices 0.895 0.96 1.08 0.90   Please answer this asap. For upvote. Thanks

On close investigation of a sample it was found to be in three layers 20mm, 60mm, and 40mm. The permeability of these layers are 3x10-³mm/sec, 5x10-4mm/sec, and 17x10-4mm/sec respectively. Find kH kyi H, +kµz ·H, +kµ3 H; +…+ k, · H, H