1) 35 POINTSPlot the Standard Proctor curve of dry unit weight versus water content (seebelow table) and;a) Indicate the maximum dry unit weight and optimum water content.b) What range of water content would be acceptable if the specifications requireat least 98% relative compaction and water content dry of optimum? Showhow you calculated the relative compaction and show on the plot the range ofwater contentsWater Content(%)Dry Unit Weight (pcf) Specific Gravity=2.708111111131151141417201092) 15 PointsA sample of soil has a wet weight of 62 lbs. and a volume of 0.56 cubic feet.When dried in an oven the soil weigh 50 lbs. If specific gravity of the soil is 2.64,determine the water content, wet unit weight, dry unit weight, and void ratio ofthe soil.3) 50 PointsClassify the five soils according to the AASHTO method of soil classification.(a) A sampie of well-graded gravel with sand has 73% fine to coarse subangular gravel, 25% fineto coarse subangular sand, and 2% fines. The maximum size of the particles is 75 mm. Thecoefficient of curvature is 2.7, while the uniformity coefficient is 12.4.(b) A dark brown, wet, organic-odor soil has 100% passing the No. 200 sieve. The liquid Nmit is32% (not dried, and is 21% when oven dried!) and the plastic index is 21% (not dried).(c) This sand has 61% predominately fine sand, 23% silty fines, and 16% fine subrounded gravelsize. The maximum size is 20 mm. The liquid limit is 33% and the plastic limit is 27%.(d) This material has 74% fine to coarse subangular reddish sand and 26% organic and silty darkbrown fines. The liquid limit (not dried) is 37% while it is 26% when oven dried. The plastic index(not dried) is 6.(e) Although this soil has only 6% nonplastic sity fines, it has everything else! It has gravelcontent of 78% fine to coarse subrounded to subangular gravel, and 16% fine to coarsesubrounded to subangular sand. The maximum size of the subrounded boulders is 500 mm. Theuniformity coefficient is 40, while the coefficient of curvature is only 0.8.

Plot the compaction curve by keeping water content along the horizontal axis and the dry unit weight…

Plot the Standard Proctor curve of dry unit weight versus water content (see below table) and; a) Indicate the maximum dry unit weight and optimum water content. b) What range of water content would be acceptable if the specifications require at least 98% relative compaction and water content dry of optimum? Show how you calculated the relative compaction and show on the plot the range of water contents Water Content(%) Dry Unit Weight (pcf) Specific Gravity=2.70 8 11 14 113 115 17 20 114 109

Plot the Standard Proctor curve of dry unit weight versus water content (see below table) and; a) Indicate the maximum dry unit weight and optimum water content. b) What range of water content would be acceptable if the specifications require at least 98% relative compaction and water content dry of optimum? Show how you calculated the relative compaction and show on the plot the range of water contents Water Content(%) Dry Unit Weight (pcf) Specific Gravity=2.70 8 11 14 113 115 17 20 114 109

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter2: Origin Of Soil And Grain Size

Section: Chapter Questions

Problem 2.2CTP: Refer to Problem 2.C.1. Results of the sieve analysis for Soils A, B, and C are given below. To...

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