**Question:** The primary consolidation settlement from sand is anticipated to be larger than from clay.**Options:** - ○ it depends on the soil stress history - ○ False - ○ True This question relates to the behavior of different soil types under load and their consolidation properties. Consolidation refers to the process by which soils decrease in volume over time as pressure is applied, which is critical in geotechnical engineering. The options suggest different factors that could influence the consolidation characteristics—whether soil stress history affects the comparison, or if the statement is simply true or false. Understanding how sand and clay react under pressure is vital for construction and land development projects.

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Answered: The primary consolidation settlement…

The primary consolidation settlement from sand is anticipated to be larger than from clay it depends on the soil stress history False O True

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.

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How does the primary (consolidation) compression—occurs rapidly even in fully saturated coarse-grained deposits?
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a) Calculate the OCR and OCM for the midpoint of the clay layerprior to fill placement. b) Calculate the settlement for the clay layer in the soil profile shown in problem 3, exceptassume the clay is normally consolidated. c) Calculate the settlement for the clay layer in the soil profile shown in problem 3, exceptassume the clay has a preconsolidation stress of 1800 psf. d) Assume the time to primary consolidation is 15 years,and the design life of the project is 50 years. What will the secondary compression of the claylayer be? Answers3 1.45 ina) OCR = 4.06 OCM = 3014.8 lb/ft2b) 6.0 inc) 3.53 ind) 0.79 in
8) A factory building is going to be constructed on a deep sand deposit. The project engineer has already taken samples from the site and applied laboratory tests (drained triaxial tests) to detemine the shear strength parameters of the sand. The unit weight of the sand is 16kN/m3. The void ratio of the sand is 0.5. Specific gravity is 2.65. In the test, the confining pressure is kept constant as 100kPa and the deviator stress increases gradually until 300kPa (at failure). Calculate the friction angle of the sand.
The fresh mix with 5mm slump magnitude is more likely to get segregated * True False
A 3 m thick stratum (drained in two directions) of saturated Clay and under overburden, exhibited 90% primary consolidation in 75 days. Find the coefficient of consolidation of the clay for the pressure range. a) Take a 30 mm thick specimen, how long will it take for it to show 80% consolidation in the laboratory for a similar length of pressure, consider a two-way drain? b) If the specimen is 25 mm, time to reach 60% consolidation, with drainage in one direction?
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A stratum of sand and a stratum of clay have the same thickness of 3 m. The coefficient of compressibility of sand is one fifth of coefficient of compressibility of clay and the permeability of sand is 10,000 times that of the clay. Assuming the same initial void ratio the ratio of the consolidation time for the clay to that of the sand for same degree of consolidation is