This method covers the determination of bulk and apparent specific gravity. The current tests used for determining the specific gravity and absorption of aggregates are aashto t 85 and aashto t 84 for coarse and fine aggregates. Specific gravity of coarse aggregate is determined by the ratio of weight of a given volume of aggregate sample to the weight of equal volume of water. Pdf determination of the specific gravity and water. The batch plant operator measures the aggregate moisture and finds. Pdf determination of specific gravity and water absorption of coarse aggregate. Specific gravity and absorption of coarse aggregate astm c 127 88 introduction. This test method covers the determination of specific gravity and absorption of course aggregates. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8514. This test method describes the procedure for the determination of the bulk and apparent specific gravities and absorption of coarse aggregate. Bulk specific gravity and water absorption of aggregate. Method of test for specific gravity and absorption of fine aggregate. This method applies to coarse aggregate, fine aggregate and combined aggregate this was the only method suitable for measuring combined aggregates. In this test method we determine the relative density i.
California test 202 sieve analysis of fine and coarse aggregates. The objective of the experiment is to determine the bulk and apparent specific gravity and absorption of coarse aggregate. Ct 207 september 1, 2011 pdf method of test for specific gravity and absorption of fine aggregate this test method is only valid for projects advertised during the period september 2011 through february 2012. Relative density specific gravity ssd is used if the aggregate is in a saturated surfacedry condition, that is, if its absorption has been satisfied. The bulk ssd specific gravity and absorption are based on aggregate after 15 to 19 hours soaking in water. Depending on the procedure used, the bulk specific gravity is dimensionless and expressed as ovendry od, saturatedsurfacedry ssd. Gsb and absorption are based on aggregate after soaking in. The bulk specific gravity ssd and absorption are based on aggregate after 1519 h of soaking in. Specific gravity and water absorption test of coarse aggregate. Aug 31, 2020 values for absorption and bulk specific gravity ssd may be significantly higher for aggregate not oven dried before soaking than for the same aggregate treated in accordance with 8.
Rc1535 development of new test procedures for measuring fine. Video shows stepbystep procedure for determining specific gravity and absorption of coarse aggregates as per astm c127. Standard test method for relative density specific. Astmc127 standard test method for relative density. This test method covers the determination of the average relative density of a quantity of coarse aggregate particles not including the volume of voids between the particles, the relative density specific gravity, and the absorption of the coarse aggregate. Improved test methods for specific gravity and absorption. C 6 test method for sieve analysis of fine and coarse 3. Astm c12715 standard test method for relative density. Pdf standard test method for specific gravity and absorption of. This method is not intended to be used with lightweight aggregate. The ratio of the weight in air of a unit volume of aggregate, including the weight of water within the voids filled to the extent achieved. Relative density specific gravity ssd is used in the determination of surface moisture on fine aggregate by displacement of water in test method c70. The specific gravity may be expressed as bulk specific gravity bulk specific gravity, ssd, and bulk specific gravity, od, or apparent specific gravity.
The test for the apparent specific gravity and absorption of. California test methods version selection caltrans. Fine aggregate procedure ii is all aggregate passing the. Research the necessary laboratory test employed in the determination of specific gravity and absorption of fine aggregates. Fine aggregate procedure ii is all aggregate passing the no.
C 127 88 purposethe purpose of this experiment is to determine the following parameters of coarse aggregate. The specific gravity may be expressed as bulk specific gravity, bulk specific gravity saturated surfacedry ssd, or apparent specific gravity. It is the responsibility of the uses of this method to consult and use. Density, relative density specific gravity, and absorption of. The specific gravity of coarse aggregate as per is code is 2.
The mix design shows fine aggregate absorption to be 2% and coarse aggregate absorption to be 1%. Prior to handling test materials, performing equipment setups, andor conducting this method, testers are required to read safety and health in section h of this method. Dry the sample to constant weight and use the procedure outlined in tex200 f for sieve analysis. Koya university faculty of engineering civil department 2nd stage concrete technology test no. Specific gravity and absorption of coarse aggregate the.
To determine the specific gravity bulk and apparent and absorption capacity of coarse aggregate agg5 related standard. Ts1c a2 aashto standard method of test for specific gravity and absorption of coarse aggregate aashto designation. This test method is intended for use in determining the bulk and apparent specific gravity, and absorption of coarse aggregates retained on the. Specific gravity and water absorption of coarse aggregate lab report is prepare after calculating above values. This test is similar in nature to the specific gravity of fine aggregate test. Coarse aggregate specific gravity pavement interactive. Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities. The specific gravity may be expressed as bulk specific gravity od, bulk specific gravity ssd saturatedsurfacedry, or apparent specific gravity. This method covers the procedure for determining unit weight or bulk density, specific gravity, density, voids, absorption and bulking of aggregate. The specific gravity of aggregates normally used in construction ranges from about 2. The bulk specific gravity may be used in calculating the maximum theoretical specific gravity g t or the voids in the mineral aggregate vma of a bituminous mixture. Astm c127 01 standard test method for density, relative.
The ratio of the weight in air of a unit volume of aggregate at a stated temperature to the weight in air of an equal volume. The bulk specific gravity, saturated surface dry test is the method used for the determination of the weight per ft. Bibliography improved test methods for specific gravity. Aashto t 85 specific gravity and absorption of coarse aggregate. C 127xx american association of state highway and transportation officials 444 north capitol street n. Sample source the aggregate was bought on a sand and gravel located at dumanlas st. Improved test methods for specific gravity and absorption of. Standard test method for density, relative density specific. This approach involves the soaking of the coarse aggregate samples for 15h aashto t 85 and 24 4 h astm c127, and drying the aggregate to its saturatedsurface dry ssd state with the aid of a dry absorbent cloth. Specific gravity is defined as ratio of weight of solid to the weight of an equal volume of gas free distilled water no dissolved airimpurities at a stated temperature. Specific gravity and water absorption of coarse aggregate. Specific gravity and absorption of coarse aggregate complete. Characteristics of coarse aggregates unit weight, water.
Specific gravity is the ratio of weight in air of a unit volume of a material to the weight of an equal volume of water. The relative density specific gravity, a dimensionless quantity, is expressed as ovendry od, saturatedsurfacedry ssd, or as apparent relative density apparent specific gravity. Improved test methods for specific gravity and absorption of coarse and fine aggregate develops test methods for determining the specific gravity and absorption of coarse and fine aggregates. Solution for laboratory specific gravity and absorption tests are run on two coarse aggregate sizes, which have to be blended. Astm c128 specific gravity and absorption of fine aggregate vll. Specific gravity and water absorption tests on aggregates. Specific gravity and water absorption for coarse aggregate basic data weight of saturated, surfacedry aggregate in air, b 2000. Specific gravity and absorption of fine aggregates cmt lab. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8510. The determinations that may be made from this procedure are identical to those made in aashto t 85 specific gravity and absorption of coarse aggregate. Bulk specific gravity also known as bulk dry specific gravity. Astm c127 specific gravity and absorption of coarse aggregate vi. Sd 210 method of test for specific gravity and absorption of. This is especially true of particles larger than 75 mm 3 in.
Sep 15, 2015 standard test method for density, relative density specific gravity, and absorption of coarse aggregate astm c127 15 september 2015 page 1 of 3 apparatus section 6 1. This method covers the determination of specific gravity and absorption of coarse aggregate. This test coarse aggregate6 method is not intended to be used with lightweight aggregates. There are two new methods currently available for determining bulk specific gravity and absorption of coarse and fine aggregates, the aggplustm system using the. Evaluation of methods for measuring aggregate specific gravity. Specific gravity may be expressed as bulk specific gravity g. Standard test method for density, relative density. Coarse aggregate specific gravity and absorption for mineral aggregates used in asphaltic concrete, other than asphaltic. The current method of specific gravity and absorption of coarse aggregate testing is based on the aashto t 85 and astm c127 standards. Aashto t 84, standard method of test for specific gravity and absorption of fine aggregate 2. Material having higher specific gravity is generally considered as having higher strength.
Aashto test methods have been in use since their introduction in order to measure the specific gravity and absorption values of aggregate materials. The increase in mass due to water in the pores of the material. The bulk specific gravity ssd and absorption are aashto no. Coarse aggregate procedure i represents aggregate retained on the no. Specific gravity and absorption of coarse aggregates v31. Trbs national cooperative highway research program nchrp report 805. Pdf determination of specific gravity and water absorption of. This method covers the determination of bulk, and apparent specific gravity, 74. The absolute volume of a 90lb sample of the aggregate is. Method of test for specific gravity and absorption of coarse aggregate 1. This test method determines the specific gravity of fine aggregates that have been soaked for a period of 1519 hrs. Mar 27, 2021 general is 2386 2016 part 3 method of test for aggregates for concrete part iii specific gravity, density, voids absorption and bulking.
Astm c566 total moisture of aggregate by drying abbreviation notes. For example, the specific gravity of a dry coarse aggregate gs is 2. Specific gravity and water absorption test of coarse aggregate pdf specific gravity and water absorption test of coarse aggregate are two important test of coarse aggregate used in construction. The increase in weight due to water contained in the pores of the material. Aashto t 85, standard method of test for specific gravity and absorption of coarse aggregate 2. Test methods for determining specific gravity and absorption of coarse aggregate i1 aashto t 85 and astm c 127 7 2 78 v i2 aggplus system using corelok device 2 7 22 i3 rapid aashto t 85 with the corelok 7 2 78 v i4 sg5 specific gravity and absorption system 7 2 78 v. Specific gravity and absorption of coarse aggregate weight.
Sd 210 method of test for specific gravity and absorption. Standard test method for relative density specific gravity. The volume of coarse aggregate would be coarse aggregate 1674 lb2. T 85 specific gravity and absorption of based on aggregate after 24 h soaking in water. This method of test covers the procedures for determining the specific gravity and absorption of aggregates. Test methods for determining specific gravity and absorption of coarse aggregate 1 aashto t 85 and astm c127 7 2 78 2 aggplus system using corelok device 2 7 22 3 rapid aashto t 85 with the corelok 7 2 78 4 sg5 specific gravity and absorption system 7 2 78 5 volumetric immersion using phunque flasks.
The current tests used for determining the specific gravity and absorption of aggregates are aashto t 85 and aashto t 84 for coarse and fine aggregates respectively. Significance this test method covers the determination of specific gravity and absorption of coarse aggregate. The test specific gravity of coarse aggregate is used to calculate the specific gravity of a coarse aggregate sample. The specific gravity of aggregates normally used in road construction ranges from about 2. This approach involves the soaking of the coarse aggregate. This test is for determining the bulk specific gravity and the absorption of coarse aggregate. T 85 specific gravity and absorption of coarse aggregate. Specific gravity of coarse aggregate aashto t 85 glossary absorption. Specific gravity may be expressed as bulk specific gravity g sb, bulk specific gravity, saturated surface dry g sb ssd, or apparent specific gravity g sa. Specific gravity of aggregates is considered as an indication of strength. Divide the coarse aggregate into sizes that conform to. Specific gravity and water absorption of coarse aggregate lab. Astmspecific gravity and absorption of aggregate by.
Standard test method for the determination of relative density i. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 85. Aashto t 84 specific gravity and absorption of fine aggregate. Specific gravity and absorption of fine aggregate nebraska. Specific gravity and absorption of coarse aggregate. The british standard test for the apparent specific gravity and absorption of coarse aggregate b. T 85 specific gravity and absorption of based on aggregate after 24 h soaking. The coarse aggregate specific gravity test figure 1 is used to calculate the specific gravity of a coarse aggregate sample by determining the ratio of the weight of. Specific gravity may be expressed as bulk specific gravity gsb, bulk specific gravity, saturated surface dry gsb ssd, or apparent specific gravity gsa. Recommended values of specific gravity and water absorption for aggregates. Determining the specific gravities of coarse aggregates.
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