Determine the specific gravity of given fine aggregate sample. Method of test for specific gravity and absorption of fine aggregate. The increase in mass due to water in the pores of the material. Specific gravity of fine aggregates indicates quality and property of the material and specific gravity value is necessary for. The current method of specific gravity and absorption of coarse aggregate testing is based on the aashto t 85 and astm c127 standards. Current methods at determining the specific gravity and absorption of fine and coarse aggregates are the aashto t8400 astm c128, standard method of test for specific gravity and absorption of fine aggregate.
It must be quality control fine aggregate and coarse aggregate. The procedures for determining the bulk specific gravity of the fine aggregate in a ssd condition and the percentage of absorption are as follows. Dry a representative sample of the fine aggregate about 1,000 grams to a constant weight at 110c. Test equipment for determining specific gravity of aggregate. The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. Bulk specific gravity also known as bulk dry specific gravity. A balance of capacity not less than 3kg,readable and accurate to 0. Its should be necessary to test of aggregate from used materials. Relative density specific gravity ssd is used in the determination of surface moisture on fine aggregate by displacement of water in test method c70. Determining the specific gravities of coarse aggregates. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8514. To determine the specific gravity bulk and apparent and absorption capacity of coarse aggregate agg5 related standard. Why is the specific gravity of finegrained soil more than. What is the difference between fine aggregate and coarse.
This method applies to coarse aggregate, fine aggregate and combined aggregate this was the only method suitable for measuring combined aggregates. Astm c127 15 standard test method for relative density. T 85, specific gravity and absorption of coarse aggregate. When corresponding fine aggregate specific gravity and absorption are determined on minus no. There are four determinations that may be made from this procedure. Specific gravity of fine aggregate can be defined as the ratio of the weight of given volume of coarse aggregate to the weight of given volume of distilled water. North dakota department of transportation, materials and research. October 2012 sieve analysis of fine and coarse aggregates fop for aashto t 27. Astm c127 specific gravity and absorption of coarse aggregate 1. It is similar in nature to the coarse aggregate specific gravity test. Specific gravity of coarse aggregate linkedin slideshare. These properties are specific gravity and absorption. When corresponding fine aggregate specific gravity and. Relative density specific gravity is also used in the computation of voids in aggregate in test method c29c29m and in test method c1252.
Bulk specific gravity is the ratio of the weight in air of a unit. Specific gravity and absorption of coarse aggregate fop for aashto t 85 scope. Properties of aggregates and its values for use in construction. Optimised design of experiment was used with two variables rates of fine aggregate replacement or of coarse aggregate replacement on the basis of identical composition. The increase in weight due to water contained in the pores of the material. Relative density specific gravity ssd is used if the aggregate is in a saturated surfacedry condition, that is, if its absorption has been satisfied. Determination of specific gravity of fine aggregates. 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. Part iii specific gravity, density voids, absorption and bulking. The crushed stone or crushed gravel aggregate make the asphalt or concrete mix somewhat difficult to place. Fine and coarse aggregate is very necessary target result for every rcc and road side department. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. 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. Determination of specific gravity of fine aggregates the constructor.
The coarse aggregate particles are usually crushed stone or crushed gravel, and the fine aggregate particles are usually natural sand. The fine aggregate serve the purpose of filling all the open space in between the coarse particles. An equilibrium or scale of volume of minimum 3 kg, decipherable and precise to 0. Study on tests fine and coarse aggregate engineering. Coarse aggregate may be available in several different size groups, such as 19 to 4. Fine grained particles have less void space or pore space and coarse particles have more pore space. Specific gravity and absorption of fine aggregate ftp directory. If the fineness modulus is constant, the volume of coarse aggregate increase with size of the aggregate, or with the decrease in surface area of the coarse aggregate the main cause in variation in weight of cube found to be specific gravity of coarse aggregate. Standard test method for relative density specific gravity. C 128 test method for density, relative density speci. Brings an automated, computerized test method to one of the oldest and most reliable methods of measuring displacement to find volume.
Sample size 2 kg or less, readability and sensitivity to 0. Conical mold and tamper h3360 used for determination of bulk and apparent specific gravity and absorption of fine aggregate, brass mold is 40mm id at top, 90mm id at bottom, 75mm high. Note 3it normally takes about 15 to 20 minutes to eliminate air bubbles by manual methods. Is 2386part iii 1963 methods of test for aggregates for concrete. Mar 09, 2017 2 introduction the coarse aggregate specific gravity test 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. The specific gravity of sands is considered to be around 2. Aggregates having low specific gravity are generally. Specific gravity, density, voids, absorption and bulking mechanical properties soundness measuring mortar making properties of fine aggregate alkali aggregate reactivity petrographic examination 0.
This method of test is used to determine the particle size distribution of aggregates by dry sieving only. C6 test method for sieve analysis of fine and coarse aggregates. Sfn 2199 72019 pit location laboratory number owner project number sampled from pcn type of material submitted by date received. Astm c128 15 standard test method for relative density. In this study, concrete mixes with fine and coarse aggregates recycled from fresh concrete waste as a substitution of natural aggregates are studied. California test methods version selection caltrans. Astm c 127 is used to determine the specific gravity and absorption of coars aggregate not lightweight. This standard is issued under the fixed designation c 127. Rc1535 development of new test procedures for measuring. Sample container in the form of a wire mesh bucket of capacity 4000 7000 cm 3 and not more than 6. 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 test method determines the specific gravity of coarse aggregates that have been soaked for a period of 15 hours figure 1. Improves repeatability and reliability of aggregate specific gravity and absorption. Fine aggregate specific gravity sample and pycnometer.
Improved test methods for specific gravity and absorption of. Methods of test for aggregates for concrete, part 3. It is similar in nature to the fine aggregate specific gravity test figure 1. The specific gravity may be expressed as bulk oven dry o. An alternative method for measuring the specific gravity and absorption characteristics of coarse and fine aggregates. Specific gravity and absorption of coarse aggregate. M 6, fine aggregate for hydraulic cement concrete m 231, weighing devices used in the testing of materials t 2, sampling of aggregates t 11, materials finer than 75am no. Effect of specific gravity on aggregate varies the weight of. 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. Bulk specific gravity gsb also known as bulk dry specific gravity. A study of concrete made with fine and coarse aggregates. Scope sieve analysis determines the gradation or distribution of aggregate particle sizes within a given sample. Coarse aggregate procedure i represents aggregate retained on the no.
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. In addition to the time consuming 1519 hours for aashto t8400 24 for. Astmspecific gravity and absorption of aggregate by. To improve the workability, many mixes contain both angular and round particles. The proportions of replacement were 0%, 50%, and 100% by mass of aggregates. So the determination of specific gravity of fine aggregate is very essential. 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. For assessment of the specific gravity of specified specimen of fine and coarse aggregates.
Coarse aggregates in this case gravel, are particles that are retained on a sieve number four named according to its openings of 4. See appendix a1 of the materials testing manual for information regarding the. Effect of specific gravity on aggregate varies the weight. Aashto t84 c128 specific gravity fine aggregate duration. Specific gravity and absorption, coarse aggregate astm c 127. 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. To determine the bulk specific gravity and apparent specific gravity of coarse aggregates. Note 1this sample preparation method is not applicable when performing a sieve. Sieve analysis of fine and coarse aggregate dotd designation. Typical values substance specific gravity density lbft3 water 1. 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. 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. Fine aggregate is used in many fields in sites for many purposes. Perform a volumetric sieve analysis when aggregates with differences in bulk specific gravity greater than 0.
Physical properties of aggregates rowan university. Fine aggregate specific gravity pavement interactive. C332 specification for lightweight aggregates for insulating concrete. Specific gravity and fine aggregate kit, 230v 5060hz h3373a. Coarse aggregate specific gravity pavement interactive. Specific gravity and absorption of fine aggregate nebraska. Specific gravity of fine aggregatetest on aggregates. Specific gravity of coarse and fine aggregates civilarc. Sg1 includes pycnometer jar and top, conical mold, and tamper. C128 test method for density, relative density specific gravity, and absorption of fine aggregate. Specific gravity of coarse aggregates construction. 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. If the specific gravity of the material is different from the standard value, it indicates the change in shape and. Should this method be used to determine the specific gravity and absorption of lightweight stones.
Trbs national cooperative highway research program nchrp report 805. C330 specification for lightweight aggregates for structural concrete. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. Aggregates for concrete e sieve and predominantly retained on the 75 m no.
1687 1596 1620 729 1274 349 925 900 1538 746 873 1529 506 144 455 531 624 1069 1628 1137 223 47 1301 662 506 1099 1322 769 1347 1068 1040 514 1450 1694 529 993 1271 27 383 235 115 723 1411 732 703