Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 17, Problem 11P
To determine
The soil classification using AASHTO method and group index of the soil.
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The following table shows the sieve analysis data on the left and hydrometer test data on the right for the minus No. 200 sieve material for a given soil.
(a) Compute Cu and Cc.
(b) Report the percentage gravel, sand, silt, and clay according to AASHTO.
(c) Classify the soil according to AASHTO.
How to determine the optimum water content and the corresponding maximum dry unit weight of the soil using graph in Excel?
Classify the soil according to AASTHO classification and determine the Group Index in each case
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- Repeat Problem 2.11 with the following data. 2.11 The grain-size characteristics of a soil are given in the following table. a. Draw the grain-size distribution curve. b. Determine the percentages of gravel, sand, silt, and clay according to the MIT system. c. Repeat Part b using the USDA system. d. Repeat Part b using the AASHTO system.arrow_forwardAlso determine the type of soil based on the calculated value.arrow_forwardGiven the data of sieve analysis of the soil; 1. Determine the approximate effective size of the soil 2. Determine the approximate coefficient of curvature 3. Classify the soil using the AASHTO classification systemarrow_forward
- 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.arrow_forwardLaboratory compaction test results and fielddetermined in-place density (unit weight) results are reported in terms of dry density or unit weight and not wet density or unit weight. Outline the reasons for this procedure of reporting. (Hint: Consider the soil properties directly related to density or unit weight.)arrow_forwardClassify the soils given in Problem 2.6 by the Unified Soil Classification System and determine the group symbols and group names.arrow_forward
- Laboratory tests performed on a saturated alluvial subgrade soil gave the following information: In situ water content = 11.9%, Specific gravity = 2.65, Soil size distribution: D100 = 51 mm, D75 = 30 mm, D60 = 20 mm, D45 = 15 mm, D30 = 8 mm, D10 = 4.76 mm, D8 = 2 mm, D4 = 0.08 mm, < 2 m = 4% a. Is this soil well graded? Classify it by the AASHTO and Unified systems b. Using the sieve analysis soil data and the classification systems, estimate for a total of 100% the approximate percentages of coarse aggregate (gravel), fine aggregate (sand), silts, and clays?arrow_forwardSituation 1 – Refer to Figure. Classify the soil according to the USDA textural classification system. The soil has particle size distribution of Gravel – 21% Silt – 35% Sand – 12% Clay – 32% 1. Calculate the modified percentage of sand 2. Compute the modified percentage of silt 3. What is the classification?arrow_forwardBriefly describe the phenomenon of liquefaction in soil deposits, indicating type and condition of soil required and occurrences responsible.arrow_forward
- 1. What are the properties of the soil being improved after compacted. 2. What is the best compaction equipment to be used on a clayey soil.arrow_forwardThe following soil as specified by the AASHTO System has the following results:Percent finer than No. 10 sieve . . . . . . . . . . . . . 90Percent finer than No. 40 sieve . . . . . . . . . . . . . . 76Percent finer than No. 200 sieve . . . . . . . . . . .. . 34Liquid limit = 37Plasticity index = 12Calculate the partial group index for the soil that belongs to groups A-2-6.arrow_forwardDefine the following properties of soil: • 1 Liquid Limit • 2 Plastic Limit 3 Plasticity Indexarrow_forward
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