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Q1 : A wet soil sample with total (wet) unit weight ( ɣtotal = 18.02 kN/m3 ), dry density

( ρdry = 1502 kg/m3 ), dry mass (ms = 135.15 gm), and air content (A% = 15 %). Find:

1- Specific gravity ( Gs ).

2- Volume of water ( Vw ).

3- Degree of saturation ( S% ).

4- Weight of water ( Ww ) in ( N ) needed to fully saturate the sample.

Solution :

Philadelphia University Faculty of Engineering Civil Engineering Department Second Semester 2017 – 2018 Soil Mechanics 0670331 First Exam Date : 4 / 4 / 2018 No. of Pages (4) Time ( 50 min. ) Dr. Mohammed Mustafa Al-Iessa

:رقم الطالب

:اسم الطالب

(40 %)

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Q2 : A standard Proctor compaction test was carried out on a soil. The results of this test

are shown in the figure below ( Gs = 2.72 ).

1- Find the relative compaction ( R.C % ) of this soil if the field dry unit weight was

found to be ( 18 kN/m3 ).

2- Draw ( with calculations ) the saturation line ( Zero Air Void Line ).

Solution :

(20 %)

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Q3 : The results of sieve analysis and hydrometer tests of a soil are shown in table below.

1- Draw the grain size analysis curve of this soil.

2- Find the percentage of its contents (G%, S%, M%, and C%).

3- Classify the soil according to USCS. Given that ( L.L. = 56% and P.L. = 18% )

Dia (mm) 6 3 1 0.4 0.2 0.1 0.06 0.02 0.008 0.003 0.001 0.0005

% Passing 100 100 52 45 38 33 30 22 16 12 8 6

Solution :

(40 %)

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