This is a continuation of the previous article I posted How to do a compaction test or In-situ density test, about the calculation of the compaction test report. The specification commonly says “The degree of compaction shall be not less than 95 percent of maximum dry density (MDD).”Please note that you have to take first a sample soil where you are going to do compaction test and test it for The MDD, for instance, to be used in this calculation is 1.7 Mg/m³, but MDD may vary depending on the type of your The compaction test is passed and satisfactory because 96.5 percent is higher than the limit of 95 percent.

My name is Noel Mades and I’m the author of qualityengineersguide.com. and the relationship between Dry Density and Moisture Content. For the compaction request, that is another part of their agreement, they can stipulate that into their contract. The line of optimum moisture contents is usually around 85% saturation and the optimum moisture content decreases with increasing compactive effort. The sand cone method is used for field density test in highway construction.

Sign Up to The Constructor to ask questions, answer people’s questions, write articles, and connect with other people. In the field, the dry density test is performed to check the compaction of layers. The technician can now place the metal tray as per the Consultant or Quality Engineer’s preferred location.As a Quality Engineer, you should make sure that the area to be tested is compacted and within the area submitted in the Inspection Request. You’re doing a great job sir . it is a fact that the slump cone test of concrete is not given accurate results for the low workability of concrete when the slump is <50mm.

Compaction contents: history of the compaction test types of compaction effort principal methods for determining maximum unit weight and optimum moisture content principal factors influencing maximum dry unit weight and optimum moisture content in the compaction tests factors influencing absolute maximum and minimum unit weights of cohesionless … The degree of compaction of a given soil is measured in terms of its dry density. Hi! Which Test Are You Using? Compaction of soil is the optimal moisture content at which a given soil type becomes most dense and achieve its maximum dry density by removal of air voids.Compaction is the process of densification of soil by reducing air voids. According to Proctor, the compaction of a soil mass is dependent on the following four major factors: 1. All Rights Reserved.
– Mass container and moist specimen in gm.W2 = 975.6 gm. Is any formula for it. From that test we get here 1.7 kg/m3How do you calculate the kpa on a site that’s been built up in 150mm uniformed layers ? 3

The Proctor compaction test is a laboratory method of experimentally determining the optimal moisture content at which a given soil type will become most dense and achieve its maximum dry density. Let us go directly to the calculations because what we are really concerned about here is “how to get the degree of compaction?” and how it is computed? VIP members get additional benefits.Lost your password? Do you think this would have any impact on the foundation later in time?Can you elaborate further what type of drenching they have done? At that point, the compacted place to be re-compacted and re-test.The volume of the hole = Mass of sand in hole/Density of used sand.Wet density = Mass of wet excavated soil/Volume of hole His original test is most commonly referred to as the standard Proctor compaction test; his test was later u… Therefore, the soil results are acceptable in case compaction test results are over 100%. I have updated the calculations and now is corrected.For base course of crusher run material testing is done, how much time after the rolling complete?Thanks for the information, please correct those numerical and units mistakes it will confuse others.Is there any regulation on how many tests need to be performed due to area size? In the field, the dry density test is performed to check the compaction of layers. The succeeding activity can now proceed.If you enjoyed reading this article, please share it with your favorite social network above this article.Welcome. The dirt exhumed from the gap is gathered and weighted. Make sure that you always check your spec.Is there any relationship between omc and moisture content found on conducting test?I apologize for the mistakes. Place the metal tray. In case the compaction test results indicate values exceeding 100%, it only means that the in-situ compaction is more than that being carried out in laboratories which is treated as the basic criterion for satisfactory degree of soil compaction. The test is named in honor of Ralph Roscoe Proctor [de], who in 1933 showed that the dry density of a soil for a given compactive effort depends on the amount of water the soil contains during soil compaction. Standard Proctor 12,400 ft -lbs/ft. The determination of maximum dry density and optimum moisture content of the soil is a measure of compaction level of soils. The Proctor Compaction Test establishes the maximum unit weight that a particular type of soil can be compacted to using a controlled compactive force at an optimum water content. These generally involve compacting soil into a mould at various moisture contents.


Here is the procedure on how to do the Compaction test or In-Situ Density test.. 1.

– Mass of container and oven-dried specimen in gm.After getting the result of moisture content you can now calculate the ρd from the formula written in “The degree of compaction is the basis and or the final acceptance once it is passed. You will receive a link and will create a new password via email.Sorry, you do not have permission to ask a question, You must login to ask question.

If you will use in-situ it would be 95 percent.Apologize for the mistakes. There are several types of test which can be used to study the compactive properties of soils. So, Let’s move on. In the field, the dry density test is performed to check the compaction of layers. Here we are going to compute the bulk density of sand down to the degree of compaction of soil..


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