For a given soil (Gs = 2.72), following are the results of compaction tests conducted in the laboratory. Moisture content (%) Dry unit weight Ya (kN/m³) 12 16.34 14 16.93 16 17.24 18 17.20 20 16.75 22 16.23 After compaction of the soil in the field, sand cone tests (control tests) were conducted at five separate locations. Following are the results: Location Moisture content (%) Moist density, p (kg/m³) 1 15.2 2055 16.4 2060 3 17.2 1971 4 18.8 1980 21.1 2104 The specifications require that a. Ya must be at least 0.95 Yd(max). b. Moisture content w should be within 1-2% of wopt. Make necessary calculations to see which the control tests meet the specifications and determine whether any of the control tests should be rejected.

For a given soil (Gs = 2.72), following are the results of compaction tests conducted in the laboratory. Moisture content (%) Dry unit weight Ya (kN/m³) 12 16.34 14 16.93 16 17.24 18 17.20 20 16.75 22 16.23 After compaction of the soil in the field, sand cone tests (control tests) were conducted at five separate locations. Following are the results: Location Moisture content (%) Moist density, p (kg/m³) 1 15.2 2055 16.4 2060 3 17.2 1971 4 18.8 1980 21.1 2104 The specifications require that a. Ya must be at least 0.95 Yd(max). b. Moisture content w should be within 1-2% of wopt. Make necessary calculations to see which the control tests meet the specifications and determine whether any of the control tests should be rejected.

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

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

For a given soil (G; = 2.72), following are the results of compaction tests conducted in the laboratory.
Moisture
content (%)
Dry unit weight Ya (kN/m³)
12
16.34
14
16.93
16
17.24
18
17.20
20
16.75
22
16.23
After compaction of the soil in the field, sand cone tests (control tests) were conducted at five separate
locations. Following are the results:
Location
Moisture content (%)
Moist density, p (kg/m³)
1
15.2
2055
16.4
2060
3
17.2
1971
4
18.8
1980
5
21.1
2104
The specifications require that
a. Yd must be at least 0.95 yd(max)-
b. Moisture content w should be within 1-2% of
Wopt.
Make necessary calculations to see which the control tests meet the specifications and determine whether
the control tests should be rejected.
any
of

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Problems 5.1 The results of a standard Proctor test are given below. Determine the mar imum dry unit weight of compaction and the optimum moisture content. Weight of wet soil Volume of Moisture in the mold (N) Proctor mold content (cm') (%) 943 14.5 8.4 943 18.46 10.2 943 20.77 12.3 943 17.88 14.6 943 16.15 16.8 5.2 For the soil described in Problem 5.1, if G. = 2.72, determine the void ratio and the degree of saturation at optimum moisture content.
2b. The following data was obtained from Sieve Analysis conducted at a Soil Lab. Using the data given in Table 02 determine: Table 02: Sieve analysis data of coarse-grained soil i. ii. iii. + Sieve Opening (mm) 20 10 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Pan Mass of Soil Retaining on each Sieve (g) 5.21 20.21 180.21 360.21 280.11 70.11 50.21 17.21 10.11 8 Percentage of clay, silt, sand and Gravel in the soil sample Uniformity coefficient and coefficient of curvature Classify the soil according to BS soil classification system
A carefully-weighed 52.9 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The hydrometer reading after 40 seconds was 20.1 and the hydrometer reading after 8 hours was 5.1. What percentage of particles in the soil sample were clay-sized? Your Answer: Answer units
P1. Answer the question correctly
SG is 2.66 and temperature is 18 degrees celcius
homework assignment practice