Soil Compaction Tests

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There are many types of Soil compaction tests which are performed on soil. Some of these are :-

1) The Sand Cone Method
One of the most common test to determine the field density of soil is the sand-cone method. But it has a major limitation that this test is not suitable for saturated and soft soils

The formula used are
Volume of soil, ft3 (m3)=[weight of sand filling hole, lb (kg)] /[ Density of sand, lb/ft3 (kg/m3)]

% Moisture = 100(weight of moist soil – weight of dry soil)/weight of dry soil

Field density, lb/ft3 (kg /m3)=weight of soil, lb (kg)/volume of soil, ft3 (m3)

Dry density=field density/(1 + % moisture/100)

% Compaction=100 (dry density)/max dry density

Maximum density is found by plotting a density–moisture curve.

2) California Bearing Ratio
The California bearing ratio (CBR) is used as a determine the quality of strength of a soil under a pavement. It also measures the thickness of the pavement, its base, and other layers.
CBR = F/Fo
where
F = force per unit area required to penetrate a soil mass with a 3-in2 (1935.6-mm2 ) circular piston (about 2 in (50.8 mm) in diameter) at the rate of 0.05 in/min (1.27 mm/min)

F0 = force per unit area required for corresponding penetration of a standard material.

3) Soil Permeability
Darcy’s law is applicable in determining the soil permeability. Darcy law states that
V = kiA

where
V = rate of flow, cm3 /s,
A = cross-sectional area of soil conveying flow, cm2
k = Coefficient of permeability which depends on grain-size distribution, void ratio and soil fabric. The value varies from 10 cm/s for gravel to less than 10–7 for clays.

To check Various Lab Test On Soil see this

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Comments
  • amoo January 11, 2012 at 12:32 pm

    how many types of compaction test do we have? name them all and the equipment to be used in any ordinary compaction lab.

  • Zmariali Rahmani January 18, 2012 at 3:12 am

    Hi this is zmariali Rahmani student of civil engineering faculty in Afghanistan so if there is sieve analysis test file with equipments pictures and compaction and also proctor test methods so please send to my email address thanks and best regards

  • Rohish kumar January 20, 2012 at 4:58 am

    I need field compaction soil testing calculation formate.
    please send me on my mail ID.
    Thanking u.
    with Regards
    Rohish Kumar

  • B ramaseshu March 20, 2012 at 9:07 pm

    Please send me soil compaction test formula with sample calculation

  • Muhammed ramatu August 30, 2012 at 2:49 pm

    Pls i need the procedure for carrying out soil compaction test.

  • OSSAI AMOS November 10, 2012 at 9:25 pm

    I am a civil engineering student in the University of Nigria Nsukka, Nigeria. I really appreciate this site for the rich information I get from it. Keep it up! I am writing my project presently on the topic; Suitability of waste oil and cement kiln dust as additivees in cement stabilized soil. I will welcom any assistance throuh my E-mail address as given above.

  • Ajay pal November 27, 2012 at 10:16 pm

    Hi this is ajay pal student of civil engineering in hazaribagh so if there is sieve analysis test file with equipments pictures and compaction and also proctor test methods so please send to my email address thanks and best regards

  • balu March 20, 2013 at 10:48 am

    Please send me the limiting value range of compaction

  • Nagesh Ghodake April 29, 2013 at 10:36 am

    plz msge me how can test of murun filling after compaction ( on field test )

  • khalil May 12, 2013 at 7:06 am

    what dose CBR rate meanse( 7%, 40% or 80%),please clarify this issue for me

  • SANTOSH KUMAR May 12, 2013 at 7:44 am

    Dear sir please tell me about brike test method strenth limit and water absorption limit.

  • suresh kumar July 12, 2013 at 4:24 am

    sir please send me detail of compaction testing formula of road

  • yuvaraj July 21, 2013 at 3:38 am

    dear sir,
    am completed one year experince with civil field.plese tips for me sir…..

  • Sengoye Samuel July 22, 2013 at 7:12 am

    i would like to get a pictorial copy of soil colors and their corresponding soil classification names.

  • Francis Muendo November 8, 2013 at 4:37 am

    (i) Describe the process for carrying out soil compaction test.
    (ii) Name the apparatus used in soil compaction process

  • csjadhav August 6, 2014 at 9:50 am

    sir,if the moisture content is high & the result of compaction is above 125% & the soil is wet. is the compaction done is OK

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