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 NOttawa sand used to fill the hole weighs 16.05 N and is known to have a density of 15.74kN/m3.Determine the in-place dry density of the tested soil.Answer:

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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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For a given soil, the results of compaction test conducted in the laboratory are given in Table 1. Table 1. Moisture content % Dry Unit Weight Ya(kN/m) 12 16.34 14 16.93 16 17.5 18 17.8 16.9 20 22 16.4 After compaction of the soil in the field, sand cone tests (control tests) were conducted at five locations, the results of sand cone tests are given in Table 2. separate Table 2. Moisture content (%) Location Moist density (kg/m') 1 15.0 2050 16.2 2070 17.3 1971 4 18.9 1988 21.3 2101 The specifications require that: a) Yd must be at least 0.95 ya(max). b) Moisture content w should be within +1.5% of wopt. 1) Draw (on graph paper) the compaction curve and ZAV curve. (Gs = 2.72). 2) Show for each location either it is accepted or not according to the specifications required and give reason why?
ASTM D1556: Standard test method for density and unit weight of soil in place by the sand cone method
• Problem 4- A soil sample from a certain excavation has the following grain size characteristics; Sieve size (mm) 2.00 0.075 0.500 0.005 0.002 % Finer 100 80 64 35 20 The group index of the soil was 17 and has a plasticity index of 24. Determine the liquid limit of the soil. GI = (F-35) [0.2 +0.005(LL-40)] +0.01 (F-15) (P.I. - 10)
A 5-lb soil sample was taken from a fill. The volume of the hole from which the sample was taken was 0.044ft cubed. The sample weighed 4.4lb after oven drying. It was determined that the specific gravity of the soil was 2.65. Compute fill void ratio.
Consider that a 58.7 gram sample of dry soil is used in making a mechanical analysis by using the hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The 40 s hydrometer reading was found to be 32.5 and the 8 hr hydrometer reading was 15.5. The percentage of sand in this soil sample is (note, a 58.7 gram sample is used here): Your Answer: Answer units
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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 %
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A 5-lb soil sample was taken from a fill. The volume of the hole from which the sample was taken was 0.044ft cubed. The sample weighed 4.4lb after oven drying. It was determined that the specific gravity of the soil was 2.65. Compute fill void ratio.
The following data represent the results obtained from the specific gravity (S.G.) test performed in a soil laboratory including twenty sand samples. The value of mode is 2.65. * Specific Gravity Number of Samples 2.30-2.39 1 2.40-2.49 2.50-2.59 2.60-2.69 2.70-2.79 2.80-2.89 1 47
Following are the results of a field unit-weight determination test performed on the same soil by means of the sand cone method: -Calibrated dry unit weight of Ottawa sand = 15.4019 kn/m3 -Calibrated weight of Ottawa sand to fill the cone = 5.3496 N -Weightof jar + cone + sand (before use) = 74.451 N -Weightof jar + cone + sand (after use) = 46.886 N -Weight of moist soil from hole = 29.509 N -Moisture content of moist soil = 10.21% DETERMINE AND SHOW COMPLETE SOLUTION 1. Dry density of compaction in the field in kg/cu.m.
Answer 4.8

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