The following results were obtained from a standard compaction test on a soil: Mass (g) Water content (%) 2010 2092 2114 2100 2055 12.8 | 14.5 | 15.6 | 16.8 | 19.2 The value of G, is 2.67. The volume of the mould is 1000 cm. 1) Plot the curve of compaction and give the optimum water content and maximum dry density. 2) Plot also the curves of saturation for S=100%, S=95% and S=90%.

The following results were obtained from a standard compaction test on a soil: Mass (g) Water content (%) 2010 2092 2114 2100 2055 12.8 | 14.5 | 15.6 | 16.8 | 19.2 The value of G, is 2.67. The volume of the mould is 1000 cm. 1) Plot the curve of compaction and give the optimum water content and maximum dry density. 2) Plot also the curves of saturation for S=100%, S=95% and S=90%.

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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Results from liquid and plastic limit tests conducted on a soil are given below. Liquid limit tests: Number of blows, N Moisture content (%) 14 38.4 16 36.5 20 33.1 28 27.0 Plastic limit tests: PL = 13.4% a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? © Cengage Learning 2014
• 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)
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A modified Proctor compaction test was carried out using a cylindrical moldwith a 1000 ml volume. Table 2 summarizes the results.a. Plot the compaction and ZAV curves (RD=2.75 and ρwater=1000 kg/m3).b. Determine the maximum dry density and the optimum moisture content.
Question 4 In a standard compaction test on a soil (grain specific gravity of 2.67) the following results were obtained: Water content (%) 12.8 Mass (g) 1890 14.5 2130 15.6 2200 16.8 2210 19.2 2160 The volume of the mould is 1000 cm (i) Determine the maximum dry density obtainable under standard test conditions and the water content at which this occurs. (ii) Using the above results, specify a detailed quality control plan for field compaction of a highway project.
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A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of 0.33. Compute its relative density and classify its consistency. (Table on the right) Solution: Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e = Thus the relative density is found to be Dr = • According to the table, the soil is classified as %; soil. TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS AT VARIOUS RELATIVE DENSITIES (data from Lambe and Whitman, 1969) Relative Density, D,(%) 0-15 15-35 35-65 65-85 85-100 Classification Very loose Loose Medium denseª Dense Very dense "Lambe and Whitman used the term "medium," but "medium dense" is better because "medium" usually refers to the particle size distribution.
The following results were obtained by testing a sample of clay: water content 25.6%, liquid limit 43.5%, plastic limit 19.1%. From this compute the following: (a) Liquidity Index (b) Plasticity Index (c) Shrinkage Limit
Pampanga sand with Gs =2.41 is mixed 16% by weight of water and compacted to produce a cylindrical sample of 50 mm diameter and 100 mm long with 2% air porosity. Calculate the void ratio of the sample.
A modified Proctor compaction test was carried out using a cylindrical moldwith a 1000 ml volume. Table 2 summarizes the results. a. Plot the compaction and ZAV curves (RD=2.75 and ρwater=1000 kg/m3)b. Determine the maximum dry density and the optimum moisture content Table 2 Moisture Content (%)Mass of WetSample (g)10.5 2033.211.8 2146.613.0 2203.514.9 2183.116.4 2147.617.6 2116.8