Proctor Test:

Apparatus:

Cylindrical Mold  =  Diameter is 4” (10.16 cm) or 6” (15.24 cm), 

Base plate & collar of 2 inches (5.08 cm).

Rammer  =  weighing 5.5 lbs (2.5 kg) , circular face of 2” diameter.

Sensitive Balance

Thermostatically controlled oven

Steel straight edge

Moisture containers

Sieve No.4

Tray & scoop

Graduated cylinder

Mixing tools (spoon, trowel, spatula).

Proctor / Soil Compacted Test:

It is a given soil sample, so that type of soil is denser and receive maximum dry laboratory experimental test to identify the moisture contents in the density.

First to take the sample of soil from the site, which are being tested so, Sieve that soil through No: 4 sieve, and that sieve will reject the coarser materials. From that sample we take about, 3 kg of soil, and add some water to increase its water content to about 5%, below the estimated optimum moisture content.

For example (for coarse grained the initial contents of water of soil is 4% and for fine-grained soil 10% initial water content is preferable). Then Mix that 3 kg soil sample with scoop. Then clean the mold and measure its volume, height and weight without the collar.

After filling the mold and fit the collar with cylindrical mold & compact the moist soil in five equal layers by the hammer with evenly distributed blows to each layer. Use 56 blows (6 inches diameter) mold with collar. We can also use 4 inches diameters mold with 25 blows.

Then remove the collar trim the compacted soil even with the top of the mold with a straight steel edge. Clean outside of the mold and base plate and weight this mold with sample of soil.

Proctor Test

Remove the soil from the mold, split it and take about 100 grams sample to keep in Oven for water content determination.

Break the soil lamps, and again mix it with remaining soil in the tray.

Add more water to increase the water content by 2% and repeat the compaction procedure for 4 times each increment of water until the mass of the compacted soil decreases.

Calculate Water contents for each trail & corresponding dry density.

Plot the compaction curve between water-content & dry density as ordinate.

Proctor Test Curve

Note the water content against the peak of the curve as optimum moisture content & the corresponding dry density as maximum dry density.

Calculation:

All these parameters should measure first to calculate the values of maximum Density and percentage of moisture contents

Density = ?

                                                                                                             Weight of the mold  = 4443

                                                                                                              Volume of Mold     = 2133

Weight of Mold + wet soil  =   9000

CAN No.                             =   B-1

CAN weight (empty)          =   69.6

Weight of CAN + wet soil (before placing soil in Oven)  =  320.7

Weight of CAN + dry soil (after dry from oven)               =  313.7

Wet soil weight   =   total weight  -  mold weight     

                            =    9000   -   4443  =  4557 g

wet density   =   wt / volume    =   4557 / 2133   =   2.136 g/cm3

Dry Density    =  wt / volume   =    

Moisture Contents = ?      (This step is after to out the container from oven)

wt of container  =

wt of soil wet soil + container  =

wt of dry soil + container    =

wt of water        =

wt of dry soil   =

Moisture   =

To measure these all values step by step then you can easily calculated and determine the moisture content of soil.