These properties are specific gravity and absorption. The main objective of these test is to, to measure the strength or quality of the material. Improved test methods for specific gravity and absorption of coarse and fine. The fine aggregate serve the purpose of filling all the open space in between the coarse particles. Methodology twenty six coarse aggregate 12 gravel, 10 lime stone, 4 slag and nine fine aggregate 4 lime stone, 3 natural sand, 2 slag sand materials were collected from various sources in ohio. This test provides methods for determining the bulk and apparent densities after submersion in water for 24h of fine aggregate, the bulk specific gravity on the basis of mass saturated surfacedry aggregate and water. The standard fine aggregate specific gravity and absorption test is. Aggregate specific gravity is needed to determine weighttovolume relationships and to calculate various volumerelated quantities such as voids in mineral. This test covers the procedures for determining the specific gravity as well as apparent specific gravity and water absorption of aggregates. Specific gravity and absorptionof fine aggregate as. Test methods for determining specific gravity and absorption of fine aggregate ii1 aashto t 84 and astm c 128 7 2 78 v ii2 modifications to determination of ssd condition in aashto t 84 astm c 128 2 7 22. We used the astm c12712 testing procedure for the coarse aggregate and the astm c12812 test procedure for the fine aggregate.
Bulk specific gravity also known as bulk dry specific gravity. Chapter 6 conclusions and recommendations improved test. Specific gravity of coarse aggregate linkedin slideshare. Standard test method for specific gravity and absorption of.
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. This method of test covers the procedures for determining the specific gravity and absorption of aggregates. 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. Specific gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8510. Water absorption gives an idea of strength of aggregate. To determine the specific gravity and absorption of fine aggregate. Aashto t 84 astm c128 standard method of specific gravity. The specific gravity may be expressed as bulk specific gravity, bulk specific gravity ssd saturatedsurface dry, or apparent specific. Specific gravity is a measure of a materials density mass per unit volume as compared to the density of water at 73. What are the errors that affected the test results of test specific gravity and absorption of coarse aggregate. Specific gravity may be expressed as bulk specific gravity gsb, bulk specific gravity, saturated surface dry gsb ssd, or apparent specific gravity gsa. Standard test method for relative density specific.
Coarse aggregate procedure i represents aggregate retained on the no. The bulk specific gravity of the fine aggregate is used to determine the uncompacted void content, a measure of fine aggregate angularity in the superpave mix design system. Cie 309 lab report 1 2 objective the aim of this experiment is to carry out a series of tests in order to determine the basic properties of two construction materials coarse and fine aggregates. It is similar in nature to the fine aggregate specific gravity test. Nov 05, 2018 what are the errors that affected the test results of test specific gravity and absorption of coarse aggregate.
Specific gravity of aggregate test equipment gilson co. C330 specification for lightweight aggregates for structural concrete. Fine aggregate procedure ii is all aggregate passing the no. Objective show more content the 1 kg sample was brought to saturated surface dry condition with the use of a blower. Determining the specific gravity of aggregates is important since it provides a relationship between volume and mass. Water absorption test for course aggregate, fine aggregate. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Coarse aggregates in this case gravel, are particles that are retained on a sieve number four named according to its. Astm c 127 is used to determine the specific gravity and absorption of coars aggregate not lightweight. What are the errors that affected the test results of test. This method has been designed to eliminate the inherent guess work built into astm c128 and aashto t84 the current cone and tamper methods in use today.
Specific gravity test of aggregates is done to measure the strength or quality of the material while water absorption test determines the water holding capacity of the coarse and fine aggregates. Should this method be used to determine the specific gravity and absorption of lightweight stones. Report the bulk specific gravity dry and apparent specific gravity to the. You asked about sources of error, not how the test works. 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 a given volume of aggregate to the weight of an equal volume of water. Absorption values are used to screen out aggregates that are highly porous and could. Determination of specific gravity and water absorption of aggregate having the size between 10 mm to 40 mm. Based on the findings of experiment 2, it was recommended that aashto t 85 be used for measuring specific gravity and absorption of coarse aggregate and the modified aashto t 84 and ssdetect methods be used for measuring specific gravity and absorption of fine aggregate. Mar 24, 2018 specific gravities can vary widely depending upon aggregate type. Study on tests fine and coarse aggregate engineering. Improved test methods for specific gravity and absorption of. Mar 09, 2017 using these three weights and their relationships, a samples apparent specific gravity, bulk specific gravity and bulk ssd specific gravity as well as absorption can be calculated. Gsb and absorption are based on aggregate after soaking in.
Relative density specific gravity is also used in the computation of voids in aggregate in test method c29c29m. Water absorption of aggregates is the percentage of water absorbed by an airdried aggregate when immersed in water at 27c for a period of 24 hours. When corresponding fine aggregate specific gravity and absorption are determined on minus no. Specific gravity and water absorption tests on aggregates. We discuss about this chapter on aggregate test of sieve analysis of fine aggregate and coarse aggregate, specific gravity and absorption capacity of the fine aggregate, specific gravity and absorption capacity of coarse aggregate, unit weight and voids in coarse aggregate. Some lightweight shales not used in hma production can have specific gravities near 1. Some deleterious particles are lighter than the good aggregates. Astm c128specific gravity and absorption of fine aggregate. Procedure of water absorption and specific gravity test on aggregates. Which method is mandatory for samples of fine aggregate drier than saturated surface. C127 test method for relative density specific gravity and absorption of coarse aggregate. 4 density, specific gravity & absorption of coarse aggregate s.
Each country is likely to have their own local varian. Trbs national cooperative highway research program nchrp report 805. Standard test method for specific gravity and absorption. C128 test method for density, relative density specific gravity, and absorption of fine aggregate. Specific gravities of our samples came out to be 2. This standard is issued under the fixed designation c 127. Sg1 includes pycnometer jar and top, conical mold, and tamper. The objective of the experiment is to determine the bulk and apparent specific gravity and absorption of coarse aggregate.
The specific gravity of aggregates normally used in construction ranges from about 2. Specific gravity and absorption of fine aggregate nebraska. C70 test method for surface moisture in fine aggregate. Improved test methods for specific gravity and absorption. Also, it relates weight which in turn creates a certain load. The increase in mass due to water in the pores of the material. 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 relative density specific gravity, a dimensionless quality, is expressed as ovendry od, saturatedsurfacedry ssd, or as apparent relative density specific gravity. The volume of coarse aggregate would be coarse aggregate 1674 lb2. This test method determines the specific gravity of fine aggregates that have been soaked for a period of 1519 hrs. Kit designed to provide you with the basic equipment to do specific gravity and absorption of fine aggregate testing.
Specific gravities can vary widely depending upon aggregate type. Should this method be used to determine the specific gravity and absorption of. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. Start studying aashto t 84 astm c128 standard method of specific gravity and absorption of fine aggregate. We used the astm c12712 testing procedure for the coarse aggregate and the astm c128. Specific gravity of aggregates is considered as an indication of strength. The fine aggregate specific gravity test figure 1 is used to calculate the specific gravity of. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. This test method is intended for use in determining the bulk and apparent specific gravity, and absorption of fine aggregates passing the 4. C125 terminology relating to concrete and concrete aggregates. Material having higher specific gravity is generally considered as having higher strength. Aggregates having more water absorption are more porous in nature and are generally considered unsuitable unless they are found to be acceptable based on strength, impact and hardness tests.
The slump of hydraulic cement concrete concrete slump test, compressive strength test. C332 specification for lightweight aggregates for insulating concrete. About 2 kg of aggregate sample is washed thoroughly to remove fines, drained and. Specific gravity and absorption of coarse aggregates v31. Standard test method for relative density specific gravity. Pycnometer a flask or other suitable container into which the fine aggregate test sample. Sep 03, 20 sign in to report inappropriate content. Astm c127 specific gravity and absorption of coarse aggregate 1. Aci aggregate testing technician level 1 section 5.
It is very necessary to test of aggregate to get good result for mix design. I4 sg5 specific gravity and absorption system 7 2 78 v i5 volumetric immersion using phunque flasks 5 4 56 ii. C6 test method for sieve analysis of fine and coarse aggregates. Water absorption value of our sample comes out to be 0. Specific gravity flask for fine aggregate the phunque flask is the key element in a newly developed method for conducting specific gravityabsorption determinations for aggregate. Specific gravity of fine aggregate kit humboldt mfg.
Aashto t84 c128 specific gravity fine aggregate duration. The purpose of this experiment is to determine the following parameters of coarse aggregate. Test equipment for determining specific gravity of aggregate. The purpose of this experiment was to determine the average density of a specific sample, relative density specific gravity, as well as absorption of fine and coarse aggregates. Specific gravity and absorption of fine aggregateconstructionway.
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