Standard Proctor Test Method| All you need to know About it| Calculations and Description

Let's Learn Civil Engineering presents Standard Proctor Test Method| All you need to know About it| Calculations and Description.
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00:00 Introduction to Standard Proctor Test Method
00:20 Purpose of Standard Proctor Test
00:58 What is Compaction
03:05 Procedure and Calculations
06:50 Plotting curve to find optimum moisture content and maximum dry density
07:42 Concluding Remarks

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Standard Proctor Test is used to determine compaction effort of different types of soil.
Fundamentals of compaction were first time presented by RR. Proctor in 1933.
According to Proctor, compaction of a soil mass is dependent on the following factors:
Soil Type
Moisture Content
Compaction Effort
Dry Density of Soil
At lower level of moisture content, adhesion and internal friction between particles resist compaction.
If we increase moisture content, water provides film between particles, increased lubrication and dry density increases.
If we continue increasing water content, water replaces soil particles. As we all know that unit weight of soil particles is more than unit weight of water, replacing soil particles will increase water particles inside a unit volume container of soil homogeneous mass.
Therefore, it's really important to find Optimum moisture content at which dry density is maximum so that compaction effort is determined.
Standard: ASTMM: D698-91
AASHTO: T99-86
Appratus:
Cylindrical Metal Mould having internal diameter of 4" to 6" and height of 4.6"
Mould should have a detachable base plate and collar of 2" height
Rammer weighing 2.5 Kg and having free fall height of 12"
Balance
Thermostatically controlled oven
Straight Edge
Moisture cans
Sieves.
Tray and scoop.
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Volume of Mould (v)= _________________________
Weight of mould with base (g) = w1=__________________
Weight of mould + compacted soil= w2=_________________
Weight of compacted soil=w=w2-w1=___________________
Bulk Density= w/v=______________________
v= 3.14*r^2*height
Water content in (%)=_____________________
Dry density=______________________________
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