Soil Compaction -Comparison Of PROCTOR & MODIFIED PROCTOR COMPACTION

Comparison Of AASHTO & MODIFIED AASHTO COMPACTION

The comparison is given below in table : 

Standard AASHTO Compaction

Modified AASHTO Compaction

1.      Volume of mould is 1/30ft3. 2.      Weight of hammer is 5.5 lb.    3.      Height of Fall is 12 in. 4.      Number of layers is three. 5.      No. of blows is 25. 6.      Maximum dry density is lower. 7.      The optimum moisture content is higher.  8.      The compaction curve is below and to the right of modified AASHTO curve. 9.      Compaction Energy  applied is 12375 ft-lb/ft3. 10.  Compaction Energy is 4.545 times lower than that of modifies AASHTO test, but the maximum dry Density obtained is only about 1.1 to 1.25 times lower than that of modified AASHTO test. 11.  The degree of saturation at optimum moisture content for AASHTO & Modified AASHTO test is Almost Same.

1.      Volume of mould is 1/30ft3.       2.     Weight of hammer is 10 lb.       3.      Height of Fall is 18 in.       4.      Number of layers is five.       5.      No. of blows is   25.       6.      Maximum dry density is higher.       7.      The optimum moisture content is lower.       8.      The compaction curve is above  and to the left of modified AASHTO curve.       9.      Compaction Energy  applied is 56250 ft-lb/ft3.      10.  Compaction Energy is 4.545 times higher than that of modifies AASHTO test, but the maximum dry Density obtained is only about 1.1 to 1.25 times higher than that of modified AASHTO test.       11.  The degree of saturation at optimum moisture content for AASHTO & Modified AASHTO test is Almost Same.