Make necessary calculations to see if the control tests meets the specifications. For a given soil, following After compaction of soil in the field, sand cone tests (control tests) were conducted at five are the results of compaction tests conducted in the laboratory: separate locations. Following are the results: Moisture Moist Unit Location Weight, kg/m³ Dry Unit Weight, kN/m3 Moisture Content, 8 Content, % 1 15.2 2055 16.4 2060 12 16.34 3 17.2 1971 14 16.93 4 18.8 1980 16 17.24 21.1 2104 18 17.20 The specifications require that: a. 7a must be at least 0.957a (max) b. Moisture content, w, should be within 2% of Wopt 20 16.75 22 16.23

Make necessary calculations to see if the control tests meets the specifications. For a given soil, following After compaction of soil in the field, sand cone tests (control tests) were conducted at five are the results of compaction tests conducted in the laboratory: separate locations. Following are the results: Moisture Moist Unit Location Weight, kg/m³ Dry Unit Weight, kN/m3 Moisture Content, 8 Content, % 1 15.2 2055 16.4 2060 12 16.34 3 17.2 1971 14 16.93 4 18.8 1980 16 17.24 21.1 2104 18 17.20 The specifications require that: a. 7a must be at least 0.957a (max) b. Moisture content, w, should be within 2% of Wopt 20 16.75 22 16.23

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.8P

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The modified Proctor test (ASTM D 698, method C) was performed for a soil with G, = 2.70, and the results are as follows: Moist Weight in Mold, gf Water Content, % 6.5 3250 9.3 3826 12.6 4293 14.9 4362 17.2 4035 18.6 3685 (a) Plot the Ya versus w relation. (b) Determine Ya.max and wopt• (c) Calculate S and e at the maximum dry unit weight point. (d) What is Y at w. (e) What is the range of water content if the relative compaction (R.C.) is required to be 95% of the modified Proctor Ya.max? pt? opr?
The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
Refer to the soil in Problem 4.5. Using the Casagrande plasticity chart, graphically estimate the shrinkage limit of the soil as shown in Figure 4.22. 4.5 The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
A soil sample was taken from a proposed cut area in a highway construction project and sent to a soils laboratory for a compaction test, using the Standard Proctor compaction procedure. Results of the test are as follows: Maximum dry unit weight = 112.6 lb/ft3 %3D Optimum moisture content = 15.5% The contractor, during construction of the soil em-bankment, achieved the following: Dry unit weight reached by field compaction = 107.1 Ib/ft3 Actual water content 16.0% %3D Determine the percent compaction achieved by the contractor.
(b) A soil sample was taken from a site of a proposed borrow pits and sent to the UTHM laboratory for a Standard Proctor test. Given the volume of proctor mold is 943.3cm³ and the results of the test are as recorded in Table Q2. (i) From the data given, examine the appropriate method of analysis to determine the compaction parameter. Discuss the moisture range permitted from your investigation, if contractor must achieve 95% relative compaction. (ii) A field density test for the soil describe in Q2 obtained the moisture content 10.5% and moist density 1705kg/m³. Determine the relative compaction
For a soil specimen, given the following: % passing sieve #4-92 %, sieve #10 -81%, sieve # 40-78%, LL-48%, PL-16%, GI-18.2 classify the soil by AASHTO classification system. GI = (F200-35)[0.2 + 0.005 (LL - 40)] +0.01 (F20015)(PI – 10)
Make necessary calculations to see if the control tests meets the specifications. For a given soil, following After compaction of soil in the field, sand cone of are the results tests (control tests) were conducted at five compaction tests conducted in the laboratory: separate locations. Following are the results: Moisture Moist Unit Location Dry Unit Weight, kN/m³ Moisture Content, % Weight, kg/m³ Content, % 1 15.2 2055 2 16.4 2060 12 16.34 3 17.2 1971 14 16.93 4 18.8 1980 16 17.24 5 21.1 2104 18 17.20 The specifications require that: a. Ya must be at least 0.95%d (max) b. Moisture content, w, should be within 2% of Wopt 20 16.75 22 16.23
2. The following laboratory test results for Atterberg limits and particle-size distribution (sieve analysis) were obtained for the soil. Classify the soil according to the AASHTO Classification System. % passing 80 Sieve No. No. 4 (4.75 mm) No. 10 (2.00 mm) No. 40 (0.425 mm) No. 200 (0.075 mm) Atterberg Limits Liquid Limit Plastic Limit 60 30 10 31 25
Ciectical Cnyineers GToup as Cv= 40.32% The following data represent the results obtained from the specific gravity (S.G.) test performed ina soil laboratory including * ?for sand samples. Find the mode Number of Specific Gravity 2.30-2.39 Samples 2.40-2.49 4 2.50-2.59 6. 12 2.60-2.69 2.70-2.79 14 2.80-2.89 3.35-3.40 2.10-2.15 2.20-2.25 2.70-2.75 2.80-2.85 2.30-2.35 2,60-2.65 2.40-2,45 2.50-2.55 2.90-2.95 ارفع اجابتك بشكل ملف wdf او صورة 1O 0O O O O O O
5.5 The modified Proctor test (ASTM D 698, method C) was performed for a soil with G, = 2.70, and the results are as follows: Moist Weight in Mold, gf Water Content, % 6.5 3250 9.3 3826 12.6 4293 14.9 4362 17.2 4035 18.6 3685 (d) What is y at wopi? (e) What is the range of water content if the relative compaction (R.C.) is required to be 95% of the modified Proctor Ya.max?
Given the following Sieve Analysis and Atterberg limits results. Answer the following questions: 1- What is the effective diameter of this soil? 2- Calculate the uniformity coefficient and coefficient of gradation 3- Determine the percentage of Gravel, Sand, Fine soils according to USCS. 4- Classify the soil using AASHTO (with GI) & USCS (with group name). Diameter Sieve # % Passing 100 (тm) 90 4 4.75 96 80 3.35 90 70 10 78.8 60 20 0.85 56.8 50 40 0.425 37.8 40 60 0.25 23.6 30 100 0.15 13 20 200 0.075 4.6 10 Рan LL 10 10 0.1 0.01 Diameter PL 5 Percent Passing (%) 2.
The table shows the laboratory result of the sieve analysis of the sample. Determine the percent finer at size 0.74and 0.004. Determine also the soil classification using AASHTO.