Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 3, Problem 3.14P
To determine
Find the volume of the underground void created by the ore removal.
Find the percentage of the tailings can be placed in the underground voids.
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In the construction of a highway, 10000 m3 of filling material with a void ratio of 0.75 is taken from the borrow pit. This material is laid in 20 cm thickness on the 10 m wide highway with a void ratio of 0.45. How many roads can be made with this material?
A packed bed is composed of cylinders having a diameter of 0.01 m and a length of double diameter. The packed bed has a depth of 2.00 m and a diameter of 0.50 m. The bulk density of the overall packed bed is 1000 kg/m3 and the density of the solid cylinders is 1600 kg/m3. 1. Calculate the void fraction 2. Calculate the effective diameter of the particles; 3. Water at 25 oC is flowing by gravity through the packed filter bed. If 20 kg/s water flow rate is needed, at what level the water should be held above the bed? Water density ρ=997 kg/m3. Water viscosity μ=0.8937 ×10-3 Pa∙s. (Ans. 0.375, 0.012m, 1.825m)
What is the three main groups of clay minerals?
O 1.- Wet Clay
- Montmorillonite
- llite
O 2.- Kaolinite
- Sand
- Silt
O 3.- Illite
Sand
- Peat
O 4.- Kaolinite
Montmorillonite
- Illite
QUESTION 3
A soil which has montmoillonite is not mnore susceptible to be affected by large volume
changes.
O 1.Correct.
O 2. Not correct.
O 3. Montmoillonite is not a clay mineral.
O 4. Kaolinite is more usceptible to be affected by large volume
changes.
Chapter 3 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- Clays are composed of three main type of minerals: kaolinite, illite, montmorillonite.1) Explain the structural differences of three clay minerals.2) Explain which clay mineral absorb water more easily and whyarrow_forward4) Calculate the amount of water necessary for slaking a quicklime obtained from a 1000 kg limestone with 5% (by weight) impurities. Is this amount larger or smaller than is necessary for a quicklime obtained from a pure limestone? (Ca:40, C:12, O:16, S:32, H:1)arrow_forwardWrite down The composition and typical properties of the more commonly occurring clays such as Chlorite.arrow_forward
- You have been hired as the Project Engineer for a development company in South Florida to build 610 housing units surrounding four lakes. Since the original ground is low, you will use the limestone excavated from the lake to fill the land in order to build roads and housing pads. Your estimated fill requirements are 700,000 m3, with a dry density equivalent to a voids ratio e= 0.46. The "in-situ" limestone extracted from the lakes has an e = 0.39, whereas the limestone dumped into the trucks has an e = 0.71. How many truckloads will you need, if each truck carries 10 m³?arrow_forwardThe porosity of the sedimentary rocks is high in comparison with other types of rocks. Accordingly, they represent reservoirs for crude oil, natural gas .and groundwater اخترأحد الخيارات أخل اختياريarrow_forwardYou have 1 mL (total volume) sample of quartz spheres, and it has a mass of 2.00g . What is the Void Ratio, using only the above information? Void Ratio: e = Vv /Vs Vv= volume of voids Vs = volume of solidsarrow_forward
- (d) Ca(HCO3)2 = 150 mg/L; Mg(HCO3)2 = 200 mg/L; CaSO4 = 180 mg/L; MgCl2 = 95 mg/L; CaCl2 = 137 mg/L; turbidity = 15 mg/L; NaCl = 58.5 mg/L. Calculate: (i) Carbonate and non-carbonate hardness in degree Clark. (ii) The cost of limesoda process, if lime (95% pure) is Rs.200/10 Kg and soda (86%pure) is Rs. 400/10 Kg for softening of 150,000 liters of hard water using Al2(SO4)3 as a coagulant @ 28.5 mg/L. (iii) A hard water sample having 530 ppm CaCO3 equivalent hardness was completely softened on passing over a zeolite bed. The exhausted bed was subsequently regenerated using 75 liters of 45 percent brine solution. Calculate the quantity of hard water that has been softened using zeolite softener.arrow_forwardIf porosity is 0.3 find void ratio.arrow_forward17. What is the group of clay mineral which is known as a 2-layered silicate clay or a 1:1 non expanding type of clay? A. Kaolinite B. Montmorillonite C. Illite D. Vermiculitearrow_forward
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