PROBLEM No. 4 Relative Density Maximum and minimum dry density tests were carried out on sand (G, = 2.67), using a one liter compaction mold. In the loosest state, 1376 g of dry sand filled the mold. At 8% water content with vibratory compaction, 1774 g of wet sand was placed in the mold at its densest state. If the void ratio of this sand at the site is 0.72, what is the relative density? %3D

An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 3.23 kg, a total volume of 0.00187 m3and a specific gravity of 2.65. Other laboratory tests are performed to determine the maximum and minimum density for the sand. At the maximum density, it is determined that the void ratio is 0.38; at the minimum density, the void ratio is 0.85. Determine the relative density of the undisturbed sample.

A sample of moist sand taken from the field was found to have a moisture content of 14% and a porosity of 38%. In the laboratory test that simulates field conditions, it was found that at its densest state, its void ratio is 85% and at its loosest state its void ratio is 40%. Determine the void ratio. Select one: O a. 0.42 b. 0.61 c. 0.79 d. 0.57 It is the densification of soil by removal of air which require mechanical energy. Select one: a. solidification b. consolidation C. compression d. compaction What particular sand is ideal for field density test using sand cone method? Select one: O a. clean sand b. Ottawa sand c. Owatta sand d. white sand

A loose, uncompacted sand fill 1.8m in depth has a relative densityof 40%. Laboratory tests indicated that the minimum and maximum voidratios of the sand are 0.46 and 0.90, respectively. The specificgravity of solids of the sand is 2.65.a. What is the dry unit weight of the sand?b. If the sand is compacted to a relative density of 75%, whatis the decrease in thickness of the 1.8m fill?

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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.

OMC-Proctor's Test A sample of dry sand has a volume of 1000 ml in its natural state. Its minimum volume when compacted is 750 ml. When gently poured into a measuring cylinder, its possible maximum volume is 1320 ml. what is the relative density?

A sample of sand above the water table was found to have a natural moisture content of 10% and a unit weight of 120 lb/ff3. Laboratory tests on a dried sample indicated values of void ratio as 0.45 and 0.90, for the densest and loosest states respectively. Compute the (a) degree of saturation, and (b) relative density. Use Gs=2.65.

A loose compacted sand fill is 1.81 m in depth and has a relative density of 41%. Laboratory tests indicated that the sand's minimum and maximum void ratios are 0.47 and 0.91 respectively. The specific gravity of the solids of the sand is 2.65.  Find; (a) Dry unit weight of the sand. (b) Void ratio of the sand having a relative density of 40%. (c) If the sand is compacted to a relative density of 75% what is the decrease in the thickness of the 1.8m fill?

The coefficient of permeability of fine sand is 0.012 cm/sec at a voids ratio of 0.57. Estimate the increased permeability using the Kozeny-Carman formula of this same sand when its voids ratio has increased to 0.72.