Soil Compaction Homework: the results of standard compaction test are shown in the table below. Determine the maximum dry unit weight and the optimum moisture content. W% 6.2 8.1 9.8 11.5 12.3 13.2 ybkN/m3 16.9 18.7 19.5 20.5 20.4 20.1 a. What is the dry unit weight and w at 95% standard compaction? b. Determine the degree of saturation at the maximum yd , Gs = 2.7? с. Plot the zero air voids line? Lecture 10 16

Soil Compaction Homework: the results of standard compaction test are shown in the table below. Determine the maximum dry unit weight and the optimum moisture content. W% 6.2 8.1 9.8 11.5 12.3 13.2 ybkN/m3 16.9 18.7 19.5 20.5 20.4 20.1 a. What is the dry unit weight and w at 95% standard compaction? b. Determine the degree of saturation at the maximum yd , Gs = 2.7? с. Plot the zero air voids line? Lecture 10 16

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Compaction

Section: Chapter Questions

Problem 5.2P

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The following results are obtained from standard compaction test for a soil, if Gs = 2.5 Water Content (%) 6.2 8.1 9.8 11.5 12.3 13.2 Unit weight (kN/m3) 16.9 18.7 19.5 20.5 20.4 20.1 Required: 1- The optimum water content (Wc %) 2- The maximum dry unit weight ( dry ) 3- The void ratio (e) 4- Degree of saturation (S %) 5- Find the weight of water needed to be added to 1 m3 to reach 100% saturation.
Note: Add 0.16 to the results on table before solving.a. Determine the maximum dry unit weight and OMC.b. What is the dry unit weight and moisture range at 95 % relative compaction?c. Determine the degree of saturation at the maximum dry density if Gs = 2.70.
9. The results of a Standard Proctoretest is tabulated as follows: (CHECK PICTURE) Determine the maximum dry unit weight of compaction Determine the void ratio at the optimum moisture content Gs = 2.68 Determine the optimum moisture content Determine the degree of saturation at the optimum moisture content
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The relative compaction of a sand in the field is 93.5%. Given the dry unit weight maximum= 16.98 kN/m3 and the dry unit weight minimum = 14.46 kN/m3. What is the water content of the sand in percent if the moist unit weight is 18.42 kN/m3? a.17.1 b.16.0 c.15.2 d.14.3
Calculate the dry unit weight, the saturated unit weight and the buoyant unit weight of a soil having a void ratio of 0.70 and a value of Gs = 2.72. Calculate also the unit weight and water content at a degree of saturation of 75%.
The relative compaction of a sand in the field is 94%. Given the dry unit weight maximum= 16.2 kN/m3 and the dry unit weight minimum = 14.9 kN/m3.For the field conditions Compute the moist unit weight in kN/m3 at a moisture content of 8%. a. 15.11 b. 16.45 c. 14.21 d. 15.23
Standard proctor compaction test results on a sandy clay (35% sand, 55% clay, and 10% silt), taken from a borrow pit, are given in the following table. The sandy clay in the borrow pit has a porosity of 65% and a water content of 5.2%. A highway embankment is to be constructed using this soil. (a) Specify the compaction (dry unit weight and water content) to be achieved in the field. Justify your specification. (b) How many cubic meters of borrow pit soil are needed for 1 cubic meter of highway fill? (c) How much water per unit volume is required to meet the specification? (d) How many truckloads of soil will be required for a 100,000 m3 highway embankment? Each truck has a load capacity of 22.5 m3 and regulations required a maximum load capacity of 90%. (e) Determine the cost for 100,000 m3 of compacted soil based on the following: Purchase and load borrow pit material at site, haul 2 km round-trip, and spread with 200 HP dozer = $15/m3; extra mileage charge for each km =…
6. The relative compaction of a sand in the field is 93.5%. Given that dry unit weight max = 16.98 kN/m3 and dry unit weight min = 14.46 kN/m3. What is the dry unit weights in the field? (Ans: 15.88 kN/m3) What is the relative density compaction? (Ans: 60.1%) What is the water content of the sand if the moist unit weight is 18.42 kn/m3. (Ans: 16%)
The ff are results of a field unit weight determination test Volume hole 0.0016 Mass of moist soil from 3.10kg Water content 12.20% Mas dry 19.50 Determine the relative compaction in %
A freshly drawn soil core of 10 cm diameter and 5 cm length weighs 700 g. On oven drying at 105°C the core weighs 625 g. Calculate the soil water content on weight and volume basis.
Determine the density index of a soil having a natural void ratio 0.7. The void ratio of the soil in the loosest and most dense state is 0.85 and 0.4 respectively. Also, calculate the relative compaction.