For any soil, at a given compactive effort, the density obtained depends on the moisture content. Four to five representative samples of soils are obtained each about 2. Astm d1557 07 standard test methods for laboratory. Apparatus metal mould volume cm3 balance capacity 10 kg, least count 1g oven 105 to 1100c sieve 19 mm metal rammer weight 4. It is sometimes referred to as the standard proctor or the modified proctor test.
In 1958, the modified proctor compaction test was developed as an astm standard. The result wascompared to the maximum dry density and optimum moisture content results from the onepoint proctor test. D1557 12 standard test methods for laboratory compaction characteristics of soil using modi. Soil density standard vs modified proctor reinforced soil structures routinely specify that all soils be compacted to 95% of the maximum density determined by astm d698 standard proctor density for conformance with the design. Weigh the empty mold without a collar, with base plate attached. Apr, 2016 proctor compaction test for laboratory this test is used to determine the relationship between water content and dry unit weight of soils. This can be measured by mainly two methods standard proctor compaction test and modified proctor compaction test. Laboratory procedures known as the modified proctor test astm d 1557aashto t 180 have been developed that accurately estimate the greater densities. Ppt proctor compaction test for maximum dry density. The determination of maximum dry density and optimum moisture content of soil is a measure of compaction level of soils. Jun 14, 2014 objective to determine moisture content and dry density relationship using heavy compaction or modified compaction method as per is2720part8. What is the difference between standard proctor test and modified. 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.
Modified proctor density structural engineering general. 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. Its process is almost same as standard proctor test with little differences which you will know here in details so, lets move on. Modified proctor test is used to determine the compaction of. So this read explains in depth, the significance, background, apparatus and procedure of the standard proctor test. The proctor compaction test is used to determine the density of a soil sample in order to determine the foundation stability of the soil. A soils optimum moisture content is usually lower when compacted to modified proctor versus standard proc. The series starts with the soil in a damp condition somewhat below the probable optimum moisture.
Astm d1557, and comparing it to the measured field dry density dry unit weight. Modified proctor or standard proctor tests are performed and the optimum moisture content as well as the maximum dry density is determined from the compaction curves. The tx 1e compaction procedure produced maximum dry unit weights that in all cases exceeded the maximum dry density determined by the astm d 4253 test procedure. The proctor compaction test is a test that compacts the soil material at various moisture contents. Moisturedensity relationships these methods of test are designed to determine the relationship between the moisture content of the materials listed below and the resulting maximum dry weight density when the material is compacted in the laboratory as specified in this procedure. Compaction is the process of increasing the bulk density of a soil or aggregate by driving out air. Modified proctor aashto t180astm d1557 testing procedures more closely approximate the compaction effort of modern equipment. Key words compaction, soils, embankment, density 18. Compaction test of soil is carried out using proctors test to understand compaction characteristics of different soils with change in moisture content. Test procedures are similar, but laboratory compactive effort of the modified method is higher. The proctor compaction test is a laboratory geotechnical testing method used to determine the soil compaction properties, specifically, to determine the optimal water content at which soil can reach its maximum dry density.
D1557 07 standard test methods for laboratory compaction characteristics of soil using modified effort 56,000 ftlbfft 3 2,700 knmm 3, compaction characteristics, density, impact compaction using modified effort, laboratory tests, modified proctor test, moisture density curves, soil compaction. Place one foot on the drill rod guide to keep it in position. The modified proctor test is of great importance and is widely used in the construction of roads, highways, earth fill dams, earth filling, airports, etc. Proctor compaction test for maximum dry density 1 proctor compaction test for maximum dry density 2 what is compaction. However, standard proctor density criteria is typically utilized in the eastern us where. Proctor soil compaction test procedures, tools and results. Jan 27, 2019 maximum dry density of soil is determined in the laboratory with the help of standard proctor test standardized by astm d698 and aashto t99. The rapid compaction test is a threepoint proctor compaction test that. Visualmanual procedure d3740 practice for minimum requirements for agencies. A modified proctor test is conducted by placing soil in a standard mold and. D4914 test methods for density and unit weight of soil and rock in place by the sand replacement method in a test pit. The modified proctor test was introduced in 1958 as astm d1557 and aashto t 180 to help with these applications at higher loads.
Objective to obtain the graphical relationship of the dry density to moisture content in the form of compaction curve, for determining the values of optimum moisture content omc and maximum dry. Modified proctor test calculation procedure standard proctor compaction test of soil density 2018. The same procedure is used each time the test is run, but the moisture content is varied for each. In all the above cases make at least five determinations and the range of moisture content shall be such that the optimum moisture content at which the maximum dry density occurs is within that range.
The test is conducted by achieving the highest density for different moisture content percentages, while applying a certain amount of energy. Alternative compaction recommendations are also presented based on txdots tx 1e compaction procedure. This research investigated the use of the modified proctor as an. Virginia test method 12 use of onepoint proctor density. Aug 30, 2018 now you know the field dry density or insitu dry density and that is afterwards compared with the maximum dry density mdd obtained already from the proctor test or modified proctor test. 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. Proctor test and modified proctor test procedure all. Compaction of soil is the optimal moisture content at which a given soil type becomes most dense and achieve its. At the same time and for each proctor test, modulus tests are performed to obtain the lab soil modulus. Later, for heavier loading condition proctor test was modified which become popular as modified proctor test. Place the mold with the collar attached on a solid base and compact the soil mass into. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Both the test helps to determine the optimum moisture content that is required for a soil to attain maximum. For the same type of soil, the modified proctor yields a higher maximum dry density and lower optimum moisture content. That concept is known today as the moisture density relationship test, laboratory compaction. Evaluation of laboratory compaction procedures for. To obtain the graphical relationship of the dry density to moisture content in. The maximum dry density and optimum moisture content, as defined below, is determined by establishing the moisturedensity relationship of the material when prepared and compacted at the modified aashto compaction effort at different moisture contents. The soil samples are pulverized and tilled with a pulverizing tool and a mallet. Laboratory procedures known as the modified proctor test astm d 1557 aashto t 180 have been developed that accurately estimate the greater densities.
Moisture density relationships these methods of test are designed to determine the relationship between the moisture content of the materials listed below and the resulting maximum dry weight density when the material is compacted in the laboratory as specified in this procedure. Guidelines for earthwork construction control testing of. The maximum density of a material for a specific compactive effort. Standard proctor test procedure apparatus calculation. Modified proctor test an overview sciencedirect topics. The maximum dry density and optimum moisture content, as defined below, is determined by establishing the moisture density relationship of the material when prepared and compacted at the modified aashto compaction effort at different moisture contents.
In modified proctor test, the soil is compacted in the given mold in five 05 layers with a rammer of 10 lbs 4. Now you know the field dry density or insitu dry density and that is afterwards compared with the maximum dry density mdd obtained already from the proctor test or modified proctor test. D155712e1 standard test methods for laboratory compaction characteristics of soil using modified effort 56,000 ftlbfft3 2,700 knmm3 density water content compaction particle size. D1557 07 standard test methods for laboratory compaction characteristics of soil using modified effort 56,000 ftlbfft 3 2,700 knmm 3, compaction characteristics, density, impact compaction using modified effort, laboratory tests, modified proctor test, moisturedensity curves, soil compaction. Jan 22, 2018 modified proctor test calculation procedure standard proctor compaction test of soil density 2018.
From this, the dry density could be determined by simply measuring the weight of the soil before and after compaction, calculating the moisture content, and furthermore calculating the dry density. Proctor went on to teach at the university of arkansas. The determination of maximum dry density and optimum moisture content of the soil is a measure of compaction level of soils. Astm d1557 12e1 standard test methods for laboratory. The calculated dry density of the field sample is 105. Also, the modified proctor compaction test is designated by astm d1557 and aashto t180d. There are two proctor tests that defined by the american association of highway officials and american standard testing material. The standard proctor test astm d698, aashto t99, and the modified. Determination of water content dry density relation using heavy compaction. That concept is known today as the moisturedensity relationship test, laboratory compaction. Objective to determine moisture content and dry density relationship using heavy compaction or modified compaction method as per is2720part8.
Astmd1557 standard test methods for laboratory compaction. Maximum dry density onepoint proctor test used for soil with more than 35% passing no. If there is 10% or greater material retained on the no. What is the difference between standard proctor test and. Aug 20, 2019 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. This type of specification requires only determination of. To obtain the graphical relationship of the dry density to moisture content in the form of. Virginia test method 1 procedure for ultrasonic testing of anchor rods. The astm designation for it d1557 i think calls for a soil sample to be sequentially placed in a small steel form like a can with an open top in layers. The remaining procedure is same as described above for cc mould. Currently, the procedures and equipment details for the standard proctor compaction test is designated by astm d698 and aashto t99.
The modified proctor test uses a 10lb hammer in an 18inch drop sleeve. Summary of method the test consists of the following steps which are explained in the test procedure. The procedure is based on a modification of the proctorfagerberg test for. Modified proctor test calculation procedure standard. Proctor, a student at the university of california, berkeley, established a laboratory procedure that easily defines the practical maximum density of a soil sample along with the optimum moisture content needed to achieve that density. Maximum dry density of soil is determined in the laboratory with the help of standard proctor test standardized by astm d698 and aashto t99. A small sample of the material is prepared, weighed and placed into the vessel. Maximum dry density of soil and optimum moisture content test.
Recommended compaction requirements for placement of. Proctor compaction test civil official all about civil. Density is a ratio expressed by the formula dw v or density equals the weight of material divided by the volume it occupies. The heavier hammer weight and longer drop distance involved in modified proctor procedures result in more compaction energy, creating higher unit weight. Proctor density is a density of a sample of soil after it has been compacted in a laboratory. However, this procedure is judged to be much more complex and less desirable than the astm d 1557 procedure.
Guidelines for earthwork construction control testing of gravelly soils 3 reclamation uses the rapid compaction test usbr 7240 5, astm d 5080 6 for routine control of silty or clayey soils. Field density test fdt 7 methods and their comparison. Proctor compaction testing unl digital commons university of. Calculate the percentage retained on 20mm sieve and 4. Both the original and modified here the modified proctor compaction test 1946 pavement grooving along taxiway center lines. Proctor developed a laboratory test procedure for determining optimum moisture content at which the dry density of soil mass become the maximum. The details included in this test method are for use with the standard proctor test. The sample must be obtained cautiously and the amount must. Modified proctorfagerberg method for coal 24th november 2014 3 of 20 1 scope this procedure details the laboratory determination of transportable moisture limit tml for coals up to a nominal top size of 50 mm. This procedure was developed in 1933 and named after r. Recommended compaction requirements for placement of uniform. Proctor who in 1933 showed that the dry density of a soil for a given compactive effort depends on the amount. Astmd1557 standard test methods for laboratory compaction characteristics of soil using modified effort 56,000 ftlbfft 3 2,700 knmm 3 compaction characteristics.
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