SCOPE 1.1 This test method describes the procedure for determining the maximum dry density and optimum moisture content for a soil by the Proctor Alternate Method D. (Mid 2013): If a soil sample has a dry unit weight of 19.5 KN/m3, moisture content of 8% and a specific gravity of solids particles is 2.67. Calculate the following: a) The void ratio. b) Moisture and saturated unit weight. MAXIMUM DRY DENSITY AND OPTIMUM MOISTURE OF SOILS BY PROCTOR ALTERNATE METHOD D (A Modification of AASHTO Designation T 99) 1. The maximum dry density obtained by this testing method is referred to as SMDD. Soil Properties & Soil Compaction Page (4) Solved Problems in Soil Mechanics Ahmed S. Al-Agha 2. The maximum dry density reduces as the optimum moisture content increases. Comparison of heavy and light compaction characteristics for all soil samples. Compaction of soil using mechanical means packs the soil particles more closely Dry density and moisture content values for each sample are then plotted and a smooth curve is formed. W = mass of wet material in gram. Compaction of soil at maximum dry density is required in many engineering projects. d = moisture content expressed as a percentage of the dry soil a = mass of container and wet material b = mass of container and dry material c = mass of container only. Dry density ratio, Rd: The percentage ratio of the dry density of the soil to the maximum dry density (MDD) of that soil. Solution Mass of dry soil excavated= Mass of soil in the hole and cone=5.99-2.81=3.18Kg Mass of soil in the hole= 3.18-.117=3.063Kg ( ) V=1.8374*10-3m3 Ɣd= The highest point on the curve represents the maximum dry density and the optimum moisture content for that soil sample. Hilf Density Ratio: Percentage ratio of the field wet density to that of peak converted wet density of the soil as determined by Hilf compaction test method. rammer falling 300 mm on the soil. The correlation of the maximum dry density and the optimum moisture content is strong (Coefficient of correlation, R = 0.91) and the relationship can be well represented as a linear equation: The above equation gives the maximum SE of 5.5 % for soil no.7. 1.1 This test method describes the procedure for determining the maximum dry density and optimum moisture content for a soil by Proctor Method A. the Some materials may be more appropriately tested by Arizona Test Method 245, "Maximum Dry Density and Optimum Moisture of Soils by Proctor Alternate Method D ". Each layer receives 25 blows from a 2.5 kg (5.5 lb) hammer at a These tests are generally referred to as Proctor tests. The nuclear density is compared to the maximum dry density to calculate the percent density and the moisture content from the nuclear gauge is compared to the optimum moisture limits. AS 1289.5.2.1 sets out a method for the determination of the relationship between the moisture content and the dry density of a soil… 4.2 Calculate the dry density for each point to the nearest 1 kg/m3 as follows: D W d x V = x +100 100 1000 where D = dry density in kg/m3. weight decreases or the soil becomes too wet to work. The Maximum Dry Density, Optimum Moisture Content and California Bearing Ratio (CBR) of granular soils compacted by standard and modified proctor test are compared. S no. The soil with maximum dry density is suitable for the several constructional purposes. 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