A field sand cone test is performed on a layer of compacted fill. determined that the fill soil has a maximum dry unit weight of approximately 120 pcf. Determine the relative compaction of the compacted fill. Unit weight of dry uniform of sand: 95 pcf Weight of sand to fill the cone: 1.10 lb weight of jar + cone + sand (before test): 16.5 lb Weight of jar + cone + sand (after test): 10.5 lb Weight of moist soil excavated from hole: 6.60 lb Moisture content of soil from hole: 10 %

A field sand cone test is performed on a layer of compacted fill. determined that the fill soil has a maximum dry unit weight of approximately 120 pcf. Determine the relative compaction of the compacted fill. Unit weight of dry uniform of sand: 95 pcf Weight of sand to fill the cone: 1.10 lb weight of jar + cone + sand (before test): 16.5 lb Weight of jar + cone + sand (after test): 10.5 lb Weight of moist soil excavated from hole: 6.60 lb Moisture content of soil from hole: 10 %

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Compaction

Section: Chapter Questions

Problem 5.15P

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1. Sand cone equipment is used to determine an in-place unit weight (field density test) on a compacted earth fill. Ottowa sand is used in the cone and is known to have a bulk density of 100 pcf. a. From the information given below, determine the in-place dry unit weight of the tested soil, and the water content. Soil sample dug from test hole wet weight = 4.62 lb Dried Weight of soil sample = 4.02 lb Weight of Ottowa Sand (Sand Cone) to fill test hole = 3.60 lb b. Determine the percentage of compaction of the tested soil if the laboratory moisture unit weight curve indicates a dry unit weight of 115 pcf and optimum moisture content of 13 percent.
Sand cone equipment is used to perform a field density test on a compacted earth fill. • Soil sample dug from the test hole = 20.60 N • Dry weight of soil sample = 17.92 N Ottawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74 kN/m3. Determine the in-place dry density of the tested soil. Answer:
A sand cone test has been performed in a recently compacted fill. The test results obtained are as follows: Initial weight of sand cone + sand = 13.51 lb Final weight of sand cone + sand = 4.26 lb Weight of sand to fill cone = 2.12 lb Weight of soil from hole + bucket = 12.42 lb Weight of bucket = 1.21 lb Moisture content test: Mass of empty moisture content can = 23.11 g Mass of moist soil + can = = 273.93 g Mass of oven-dried soil + can = 250.10 g The sand used in the sand cone had a unit weight of 81.0 lb/ft³, and the fill had a maximum dry unit weight of 121 lb/ft³ and an optimum moisture content of 11.7%, based on the modified Proctor test. Compute the relative compaction based on the modified Proctor test.
An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 4.63 kg, a total volume of 0.00198 m³ and a specific gravity of 2.70. Other laboratory tests are performed to determine the maximum and minimum density of the sand. At the maximum density, it is determined that the void ratio is 0.35 at the minimum density, the void ratio is 0.95. A. Compute the void ratio of the sand. B. Compute the relative density of the undisturbed sample. C. Compute the dry density in Mg/m³.
3. A dry sand is placed in a container 9 cm3. The dry weight of the sample is 15 g. Water is carefully added to the container so as not to disturbed the condition of the Sample. When the container is filled the combined weight of soil and water is 18 g. Determine the following: a) Void ratio of sample in the container b) Porosity c) Water constant d) Specific gravity of the soil particle e) Saturated unit weight f) Dry unit weight
Sand cone equipment is used to perform Field density test on a compacted arth fil. Soil sample dug from the test hole = 19.88 N Dry weight of soil sample = 17.92 N Ottawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74 HN/m. Which of the following gives the water content of the tested soil? O a. 15.45% O b. 12.08% O c. 14.96% O d. 10.94% e. 11.12%
A sand cone test has been performed in a recently compacted fill. The test results were as follows: Initial weight of sand cone + sand = 6.14 kg Moisture Content Test: Final weight of sand cone + sand = 1.94 kg Mass of empty moisture can = 23.11 g Weight of sand to fill cone = 0.96 kg Mass of moist soil + can = 273.93 g Weight of soil from hole + bucket = 5.65 kg Mass of dry soil + can = 250.10 g Weight of bucket = 0.55 kg The sand used on the sand cone had a unit weight of 12.75 kN/m3 and the fill had a maximum dry unit weight of 19.04 kN/m3 and an optimum moisture content of 11.7 % a. Compute the volume of hole b. Compute the dry unit weight of soil. c. Compute the relative compaction.
1. A wet sand sample has a volume of 4.64 x 10⁻⁴ and weighs 8N. After oven drying, the weight reduces to 7.5N. Calculate the water content, void ratio and degree of saturation.(use Gs = 2.7) 2. A contractor has compacted the base course for a new road and found that the mean value of the test sample shows, w = 14.6%, Gs =2.81, and γ= 18.2 KN/m³. The specification require thate ≤0.8. has the contractor complied with the specifications? 3. The moist unit weight of soil is 16.5 KN/m³. Given that the w=15% and Gs = 2.70. Find:1) dry unit weight2) porosity3) degree of saturation
The total density of sand in an embankment was found to be 1900kg/m^3 and the field water content was 12% . In the laboratory, the density of the solid was found to be 2660 kg.m^3, and the maximum and minimum voids ratio were 0.63 and 0.44, respectively What is the void ratio of the sand? Calculate the relative density of the sand in the field:
An in-place density determination (in-place unit weight) is made for the sand in a borrow pit using a balloon-type density apparatus. The damp sample dug from a test hole is found to weigh 37.90 N. The volume of the test hole is 0.00184m2. A. Compute the wet unit weight. B. This soil is to have a water content of 15%. Compute the dry unit weight of the soil. C. Compute the specific gravity of the soil if it has a void ratio of 0.423
A grain size analysis is performed on 3500 g of dry sand. No soil is retained on the 12.5-mm opening sieve. A nest of six sieves is subsequently used to separate the various sizes. The openings of the sieve meshes are, from top to bottom: 5, 2, 1, 0.5, 0.2, and 0.1 mm. The soil masses remaining on each of the six sieves are 217 g, 868 g, 1095 g, 809 g, 444 g, 39 g, and the amount of soil in the bottom pan is 28 g. Determine the effective size.
A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of soil sample from the test hole is equal to 20.60N and Dry weight of soil sample is equal to 17.92N. Ottawa sand used to fill the hole weighs 16.05N and is known to have a density of 15.74KN/m3. Determine the following: (a) The moisture content of the soil (b) The in- situ dry unit weight of the soil (c) If the dry unit weight of the soil at optimum moisture content is 18.10 kN/m3, calculate the percent compaction of the earth fill.