Question 13 What is the typical range for the specific gravity of soil solids, Gs? O 3.0 - 4.0 2.6 - 2.8 O 10 - 40 1.3- 1.5
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- 2.28. A groundwater is being considered for use as a domestic supply. The water has a temperature 15°C and the following chemical analysis: CONSTITUENT Ca+2 Mg Nat Fe +2 Cd+ HCO3 SO4 CO3 NO3 CONCENTRATION. g/m³ 190 84 75 0.1 0.2 260 64 30 440 35 a. Use an anion-cation balance to determine if the sample analysis is reasonable. b. What is the hardness of the water? c. Determine the alkalinity of the water. d. Estimate the sample pH. e. Would the water be an acceptable domestic supply? Why or why not?5 Problem: For a given inorganic soil, the following are known: Percentage passing No. 4 Sieve... 100 Percentage passing No. 200 sieve.. 77 Liquid limit Plasticity index.... ...... 63 25 70 CH or CL U-b RI40.73(L-20) MH -line OL PIOLL- CL-ML OF ML OH or OL 10 16 20 30 40 50 60 70 80 90 100 Liquid limit Classify the soil by using Unified Sqil Classification System. a) What type of soil is this? b) What is the group symbol of the soil C) What is the group name of the soil?FINES SAND GRAVEL Fine Medium Coarse Fine Coarse #200 # 4 3" 100 90 80 70 60 E 50 40 30 20 10 0.001 0.01 0.1 10 100 Particle size (mm) Observe SoilB and Classify. The LL is 30 and PL is 25. The material is inorganic in nature. Knowing this, is the soil fine grained? Course grained? what is the group symbol, soil name? What is the coefficient of uniformity, coefficient of curvature? Percent finer by weight|
- Which of the following is/are TRUE about the Specific Gravity (Gs)? It is one of the most important properties of soil mass. It is the ratio of the unit weight of soil to the unit weight of water Most soils have specific gravity ranging from 2.6 to 2.8. It is influenced by the most dominant mineral in the soil mass. i. ii. iii. iv.3-5 Mass of a dried soil sample is 250 grams (Ms). When this sample is immersed in water, the soil particles displace 95 cm³ [giving us the volume of soil solids] (Vs). Use this information to calculate the specific gravity (Gs) of the soil solids. Pw = (1 gm/cm³) (Hint, you can use the last formula from 'Illustration 3-3' from the textbook) (No Phase Diagram for 3-5) Gs= Ms Vs PwFor a given soil, the following are given Gs 2.64, moist unit weight = 17 4 kN/m3, and moisture content = 11.51% Determine the weight of water, in kN, to be added per cubic meter of soil to reach 82% degree of saturation. Round off to three decimal places. h> A Moving to another question will save this response. Activte Ruestion 2 of 20 Go to Settings to activate Windows ASUS W R- T Y] G H. V.
- Problem 7 n = Gs= Saturation = 42% 2.65 70% @DY e= p= y = g/cm³ lb/ft³Using Unified Soil Classification System, determine the following: (a) Coefficient of Gradation (b) Group Symbol. Passing No. 4 = 47 % Passing No. 200 = 10 % D10 = 3.45 mm %3! D30 = 6.29 mm De0 = 13.72 mm Plasticity for the minus No. 40 fraction: Liquid Limit = 28 % Plastic Limit = 17 % O GC-GM GP-GC O GC O Coef. Of Gradation = 0.84 O GP O Coef. Of Gradation = 3.97Question 15 The results of the particle-size analysis of a soil are as follows: • Percent passing the No. 10 sieve = 80 • Percent passing the No. 40 sieve = 40 Percent passing the No. 200 sieve = 20 The liquid limit and plasticity index of the minus No. 40 fraction of the soil are 30 and 5, respectively. Compute the group index. А) 2 В 1 с) з
- Suppose the A horizon of your soil is 5 inches thick, with a bulk density of 1.03 g soil/cm3 soil, and has a CEC of 11.5 cmol(+)/kg soil that is 2.1% K-saturated. If the amount of solution K* is equal to 1.5% of the exchangeable K*, then how much K+ (in Ibs K+) willI be in the soil solution of the A-horizon acre furrow slice?2.9 TNT A B5I 9:33 K/s Which of the following is incorrect statement. * Uniformity coefficient represents the shape of the particle size distribution curve. For a well graded soil, both uniformity coefficient and coefficient of gradation are nearly unity. A soil is said to be well graded if it has most of the particles of about the same size. all of the above. Pick up the correct statement from the following: * To an agriculturist, soil is the substance existing on the earth's surface, which grows and develops plants To a geologist, soils the material in a relatively thin surface zone within which roots oceur, and rest of the crust is termed as rock irrespective of hardness, To an engineer, soil is the unaggregated and uncemented deposits of minerals and organic particles covering the earth's crust All of the above The bulk density of a soil is defined as the unit weight of the soil solids. * true false556 TNT N 351 9:33 B/s Water content of soil can, * never be greater than 100% take values only from 0- 100% be less than 0% be greater than 100% Valid range for S S>0 S100 If the sand in in- situ is in its densest state, then the relative density of sand is, zero 1 between 0 and 1 greater than 1 Which of the following is incorrect statement. *