T 85 specific gravity and absorption of based on aggregate after 24 h soaking in water. Video shows stepbystep procedure for determining specific gravity and absorption of coarse aggregates as per astm c127. This test method determines the specific gravity of coarse aggregates that have been soaked for a period of 15 hours figure 1. Specific gravity of fine aggregate sand is the ratio of the weight of given volume of aggregates to the weight of equal volume of water. It is similar in nature to the fine aggregate specific gravity test. Ct 207 march 1, 2012 pdf method of test for specific gravity and absorption of fine aggregate. Procedure for the determination of specific gravity of fine aggregate.
Perform a volumetric sieve analysis when aggregates with differences in bulk specific gravity greater than 0. The main objective of these test is to, to measure the strength or quality of the material. Ct 206 june 1, 2008 pdf ct 206 september 1, 1998 pdf 207. The specific gravity of sands is considered to be around 2. Jun 22, 2019 video shows stepbystep procedure for determining specific gravity and absorption of coarse aggregates as per astm c127. This test method covers the determination of specific gravity and absorption of coarse aggregate. Standard test method for relative density specific gravity. Determining the specific gravities of coarse aggregates. This test method describes the procedure for the determination of the bulk and apparent specific gravities and absorption of coarse aggregate. This test method determines the specific gravity of coarse aggregates that. This method applies to coarse aggregate, fine aggregate and combined aggregate this was the only method suitable for measuring combined aggregates. Sfn 10081 62019 pit location laboratory number owner project number sampled from pcn submitted by date received.
The absolute volume of a 90lb sample of the aggregate is. Aggregates having low specific gravity are generally weaker than those with high specific gravity. The coarse aggregate specific gravity test is used to calculate the specific gravity of coarse aggregate sample by determining the ratio of. In the example in figure 31, the bulk specific gravity includes all the pores, the apparent specific gravity does not include any of the pores that would fill. D3740 practice for minimum requirements for agencies engaged in testing andor inspection of soil and rock as. Fine aggregate specific gravity pavement interactive. 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. 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. This standard is issued under the fixed designation c 127. 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.
Improved test methods for specific gravity and absorption of coarse and fine aggregate. Ct 206 october 1, 2011 pdf method of test for specific gravity and absorption of coarse. Rc1535 development of new test procedures for measuring. Standard test method for density, relative density specific. This method covers the determination of specific gravity and absorption of coarse aggregate. D653 terminology relating to soil, rock, and contained fluids. The current method of specific gravity and absorption of coarse aggregate testing is based on the aashto t 85 and astm c127 standards. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8514. 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. Specific gravity and absorption of fine aggregate nebraska. The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. The setup consists of container for filling water and suspending the wire basket in it and.
Designation d85402 and to calculate the specific gravity of aggregates coarser than the no. There are four determinations that may be made from this procedure. When corresponding fine aggregate specific gravity and absorption are determined on minus no. Aashto t 85 specific gravity and absorption of coarse aggregate. The bulk specific gravity ssd and absorption are based on aggregate after 1519 h of soaking in water. Effect of specific gravity on aggregate varies the weight of. Specific gravity is defined as the ratio of weight of aggregate to the weight of equal volume of water. Specific gravity of aggregates is considered as an indication of strength. M 231 weighing devices used in the testing of materials. Pdf standard test method for specific gravity and absorption of. This test coarse aggregate6 method is not intended to be used with.
Absorption values are used to screen out aggregates that are highly porous and could. 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. Fill the remaining part of pycnometer with distilled water and weight w3. D3740 practice for minimum requirements for agencies engaged in testing andor inspection of soil and rock as used in engineering design and construction. Bulk specific gravity gsb also known as bulk dry specific gravity. Specific gravity and absorption of coarse aggregate complete.
Observation table for specific gravity of aggregate finer than 6. Ct 206 october 1, 2011 pdf method of test for specific gravity and absorption of coarse aggregate. Take about 200gm of coarse aggregate sample in the pycnometer. Determination of specific gravity of fine aggregates.
Download a pdf of improved test methods for specific gravity and absorption of coarse and fine aggregate by the national academies of sciences, engineering, and medicine for free. Astmspecific gravity and absorption of aggregate by. Test equipment for determining specific gravity of aggregate. Coarse aggregate specific gravity pavement interactive. It is similar in nature to the coarse aggregate specific gravity test. 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. Specific gravity may be expressed as bulk specific gravity gsb, bulk specific gravity, saturated surface dry gsb ssd, or apparent specific gravity gsa.
This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8510. The specific gravity may be expressed as bulk specific gravity, bulk specific gravity saturated surfacedry ssd, or apparent specific gravity. North dakota department of transportation, materials and research. Specific gravity and water absorption tests on aggregates. Improved test methods for specific gravity and absorption of. Sfn 2199 72019 pit location laboratory number owner project number sampled from pcn type of material submitted by date received. Specific gravity and fine aggregate kit h3373a kit designed to provide you with the major equipment to do specific gravity and absorption of fine aggregate testing. A balance of capacity not less than 3kg,readable and accurate to 0.
California test methods version selection caltrans. The specific gravity of aggregates normally used in construction ranges from about 2. About 2 kg of aggregate sample is taken, washed to remove fines and then placed in the wire basket. Standard test method for specific gravity and absorption of. Procedure for specific gravity determination for aggregate coarser than 6.
Clean the pycnometer, dry it, find the weight of the pycnometer. National academies of sciences, engineering, and medicine. Specific gravity of fine aggregatetest on aggregates. Specific gravity of aggregate test equipment gilson co. The relative density specific gravity, a dimensionless quantity, is expressed as ovendry od, saturatedsurfacedry ssd, or as apparent relative density apparent specific gravity. Specific gravity and absorption of coarse aggregate. Obtain a test sample of approximately 1100 grams from the material to be tested by. Determining specific gravity of aggregates im 307 iowa dot.
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