We used both the standard proctor compaction test and the modified proctor compaction test. The line of optimum moisture contents is usually around 85% saturation and the optimum moisture content decreases with increasing compactive effort. James porter of the california division of highways, who originated the cbr test procedure, beginning in 1928. This can be measured by mainly two methods standard proctor compaction test and modified proctor compaction test. The unconfined compression test is a type of unconsolidated undrained test that is commonly used for clay specimens. The apparatus used in this field density test consists of a sand pouring cylinder, with pouring cone at its base. For good results, the sand used should be uniform, dry and clean passing a 1. Soil often needs to be taken back to the lab anyway for the performance of additional soil quality tests which are designed to provide more information about the characteristics and. The proctor test was developed to correlate with existing compaction equipment wh ich, by todays standards, was small and produced low field compacted unit weights. The degree of compaction is also called the compacting factor and is measured with the help of density ratio that is the ratio of density actually achieved in the test to the density of same concrete when it is fully compacted. The compacting factor test is performed to find out the workability of concrete.
Compaction tests can also be performed in a lab environment with soil samples taken from a site. Purpose and use of laboratory compaction tests the astm test methods for compaction are used to develop a laboratoryderived standard reference density that is used to determine the percentage of compaction and deviation from the optimum water content that is measured by the field inplace density tests. One example contains recommendations for an established perennial fruit crop, grapes, and the other example contains recommendations for three annual vegetable crops. Compaction test of soil is carried out using proctors test to understand compaction characteristics of different soils with change in moisture content. Because the stress paths, compaction states and soil structures are greatly different, the mechanical properties of each path at. Near surface sample sample no 102319 rock corrected test results uncorrected %38 in. Page 3 2 identify the major soil constituent 50% by weight using table 1.
Soil compaction is the process in which stress is applied to a soil which causes densification as the voids are filled with solids. 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. This plays a vital part in construction for soils are mainly used as supports for a lot of infrastructures. Its process is almost same as standard proctor test with little differences which you will know here in details so, lets move on. Superpave mix design and gyratory compaction levels. Site investigation prior to commencement of any road construction project involving site formation work, site investigation is carried out to establish the geological profile along the road alignment. An axial load is rapidly applied to the specimen to cause failure. Very often, samples are taken by borehole drilling for tests including, particle size. Technical report pdf available october 20 with 20,565 reads. In modified proctor test, compactive energy is about 4.
This report describes results investigating how different lab compaction methods influence the laboratory characterization of the materials. Its maximum answer is 1 but practically it is lesser than 1. The coefficient of permeability is defined as the flow rate under laminar flow conditions through a unit cross sectional are of porous medium under unit hydraulic gradient. The lab allows for more controls and more finesse of the test. The superpave mix design system evaluates the volumetric properties of the compacted samples. As construction equipment grew in size and capability, field densities event ually exceeded those produced in the lab and consequently. It can be seen that increasing the compactive effort increases the maximum dry density but decreases the optimum moisture content. Please report the percent of moisture content to the nearest 0. Determination of dry density of soil compaction test by sand replacement method in hindi road cons duration. Compaction factor test workability test of fresh concrete. Compaction factor test of concrete for low workability. In the proctor test, the soil is compacted in a mold that has a volume of 944 cm3. Laboratory compaction of road construction materials.
The compaction factor test is carried out to measure the degree of workability of fresh concrete with regard to the internal energy required for compacting the concrete thoroughly. Trace 0 to 5% by weight few 5 to 10 % little 15 to 25% some 30 to 45%. Workability of a concrete signifies the full compaction of concrete using a required or reasonable amount of work which helps to achieve the desired possible density or void of fresh concrete resulting better strength and durable concrete structure and helpful to maintain. The proctor compaction test is a laboratory method of experimentally determining the optimal moisture content at. It is also desirable to know the optimum soil conditions for compacting a given soil. Compaction test report dry density, pcf water content, % 101 106 111 116 121 126 7 9 11 15 17 19 zav spg 2. Modified proctor test is used to determine the compaction of different types of soil and the properties of soil with a change in moisture content and the relationship between dry density and moisture content. Both the tests help to determine the optimum moisture content that is required for soil to attain maximum compaction i. Compaction test report dry density, pcf water content, % 106 111 116 121 126 1 4 6 8 10 12 14 16 zav spg 2. How we measure reads a read is counted each time someone views a publication summary such as the title, abstract, and list. According to compaction theory, when samples of a soil are compacted at different water contents using the same compactive. Types of soil compaction test in laboratory standard proctor test modified proctor test gyratory compaction test 11. The example soil test reports are in exactly the same format as the one you received in the mail from the university of minnesota soil testing laboratory.
Slump test doesnt give accurate results for the low workability of concrete when the slump is compaction test introduction for earthwork construction it is important to compact soils to a dense state so that the soils will attain satisfactory engineering properties. The astm standard test methods used for determining compaction. Evaluation of laboratory compaction procedures for specification of. Laboratory soil compaction test linkedin slideshare. At failure, the total load minor principal stress is zero. Geotechnical engineering lab vi semester page 5 gcem dos 1. Bring observation note books, lab manuals and other necessary things for the class. Two types of compaction tests are routinely performed.
The location of the test should be determined accurately. Lab report proctor testcompaction test introduction for earthwork construction it is important to compact soils to a dense state so that the. Equipment cylindrical mold measuring 105 mm in diameter, 115. Scribd is the worlds largest social reading and publishing site. Ce 344 geotechnical engineering sessionali lab manual. Proctor soil compaction test procedures, tools and results. To determine the workability of fresh concrete of given proportions by slump test and compacting factor test. The test of falling head permeability test is carried out to determine the permeability of soils of intermediate and low permeability than is less than 10 4 ms. If you need to print pages from this book, we recommend downloading it as a pdf. Field density test of soil by sand replacement method. Slump test and compacting factor test of fresh concrete.
Standard test methods for laboratory compaction characteristics of soil using standard effort 12 400 ftlbfft 3600 knmm 1 this standard is issued under the. Falling head permeability test lab report 6nge1yyd92lv. Maximum dry density of soil and optimum moisture content test. The aggregate requirementsare based on traffic levels, independent of gyratory compaction levels. A test similar to the heavy compaction test but using a greater number of blows would give a graph similar to curve d.
Unfortunately, this book cant be printed from the openbook. Compaction test proctor test civil engineering notes. The cylinder is first calibrated to determine the unit weight of sand. Compaction tests results vary with the input compactive effort, usually measured in foot pounds per cubic foot of soil.
Authors joshua connelly, wayne jensen, and paul harmon 8. Experience has shown that this method may not adequately represent the true field performance of the materials. 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. The determination of maximum dry density and optimum moisture content of the soil is a measure of compaction level of soils. The contents of this report reflect the views of the authors, who are responsible for the facts. We tested fdot subgrade from an fdot stockpile to determine the relationship between its moisture content and dry density. Check the instruments for proper working conditions while taking and returning the same. Nd d 2167, density and unit weight of soil in place by the rubber balloon method, or nd t 191, density of soil inplace by the sand cone method 1 density test for each three miles of. The packing pressure compaction test is introduced as a new laboratory compaction method and it is suitable to measure the degree of compaction for malaysian cohesive soils. A curve is drawn between the water content and the dry density to obtain the maximum dry density and the optimum water content. There is a shutter between the cylinder and the cone. This is the most common laboratory soil test and the basis for all engineered compacted soil placements for embankements, pavements, and structural fills.
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