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. Aggregates having low specific gravity are generally weaker than those with high specific gravity. Coarse aggregate specific gravity test report t85 t96. Fine aggregate procedure ii is all aggregate passing the no. C125 terminology relating to concrete and concrete aggregates. The specific gravity of sands is considered to be around 2. The bulk density and void percentage of aggregate can be evaluated using standard test methods of applicable codes such as astm c 29c29m17a, is. For the purpose of this test, coarse aggregate is all aggregate material retained on the 4. Specific gravity of fine aggregate test on aggregates september 4, 2017 august 21, 2019 readcivil 0 comments fine aggregate is used in many fields in sites for many purposes. 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. There are four determinations that may be made from this procedure. Study on tests fine and coarse aggregate engineering. Astm c127 15 standard test method for relative density. Crushing test abrasion test impact test soundness test shape test specific gravity and water absorption test bitumen adhesion test crushing test one of the model in which pavement material can fail is by crushing under compressive stress.
The methods are essentially the same, except for the required time in which a sample of aggregate is submersed in water to essentially fill the. Specific gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. Immerse the aggregate in water at room temperature for a period of 15 to 19 hours. C128 test method for density, relative density specific. But water reacts with cement and forms calcium oxide. This method of test covers the procedures for determining the specific gravity and absorption of aggregates. Bulk specific gravity is also used in thecomputation of voids in aggregate inaashto t 19 and the determination of moisture in aggregate by displacement in water inaashto t 142. Specific gravity of cement detailed explanation civilology. Fine aggregate is used in many fields in sites for many purposes. Specific gravity of fine aggregate can be defined as the ratio of the weight of given volume of coarse aggregate to. Bulk specific gravity determined on the saturated surfacedry basis is used if the aggregate is wet, that is, if its absorption has been satisfied. Bulk specific gravity also known as bulk dry specific gravity. Scope this test method describes the procedure used for determining bulk specific gravity saturated surfacedry basis and absorption after prescribed soaking of fine aggregate proposed for use in portland cement concrete.
The increase in mass due to water in the pores of the material. The standard test methods used for the determination of specific gravity of coarse aggregate are described in aashto t 85 and astm c127. Astm c127 04 standard test method for density, relative. Specific gravity and water absorption tests on aggregates. The specific gravity may be expressed as bulk oven dry o. C29c29m test method for bulk density unit weight and voids in aggregate. Aashto t 85 specific gravity and absorption of coarse aggregate astm c127 standard test method for density, relative density specific gravity, and absorption of coarse aggregate 3. Calculate the specific gravity of the mixture by use of the following formula. Sfn 2199 72019 pit location laboratory number owner project number sampled from pcn type of material submitted by date received. 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. Saturated surfacedry ssd, water fills the aggregate pores. Aggregate size d maximum mm test portion mass minimum kg 63 40 32 10 16 2,6 8 0,6. Bulk specific gravity gsb also known as bulk dry specific gravity. Test equipment for determining specific gravity of aggregate.
Specific gravity basket myers aggregate specific gravity. 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. It is the measure of strength or quality of the specific material. The specify gravity test helps in identification of stone.
Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. Specific gravity of coarse aggregate linkedin slideshare. Specific gravity and absorption of aggregate by volumetric immersion method phunquetest astm june 2015 meeting by bryce simons, p. Objective to calculate the strength or grade of the material to assess the water absorption of aggregates apparatus the apparatus includes the following. Effect of specific gravity on aggregate varies the weight. Aggregates having low specific gravity are generally weaker than those with higher specific gravity values. North dakota department of transportation, materials and research. Specific gravity and water absorption test aggregates.
This device determines the bulk volume or envelope volume of a sample by measuring the volume of a finegrained material in a cylinder, and then. Manual of aggregate and concrete testing1 introduction this manual is intended to supplement, not in any way to supersede, the variousastm test methods for sampling and testing aggregate and freshly mixed and hardened portlandcement concrete. Resistance to degradation of aggregate by abrasion test report t96. A balance of capacity not less than 3kg,readable and accurate to 0. This standard is issued under the fixed designation c 127. Specific gravity of fine aggregatetest on aggregates.
The manual was prepared by committee c09 on concrete and concreteaggregates and has been accepted. Laboratory test procedure for determining bulk specific gravity of superpave gyratory compacted specimens duration. Specific gravity is defined as the ratio of weight of aggregate to the weight of equal volume of water. Relative density specific gravity is also used in the computation of voids in aggregate in test method c29c29m.
To calculate specific gravity for any material, we have to use water. Specific gravity of aggregate test equipment gilson co. Specific gravityand absorption of fine aggregate modifies aashto designation. Coarse aggregate procedure i represents aggregate retained on the no. Including 18 x 12 stainless steel reinforcement bars and 18. Aggregate sampling methods and minimum sample size im 301 minimum field and gradation test sample sizes. Astmspecific gravity and absorption of aggregate by. Determination of specific gravity of fine aggregates. It is very necessary to test of aggregate to get good result for mix design. The current method of specific gravity and absorption of coarse aggregate testing is based on the aashto t 85 and astm c127 standards.
When corresponding fine aggregate specific gravity and absorption are determined on minus no. Making a sieve analysis test of coarse aggregate in a laboratory. The specific gravity of the individual aggregates shall be determined using kt6. Determines bulk and apparent specific gravity and absorption of fine aggregate. Range of particle sizes found in aggregate for use in concrete. The coarse aggregate specific gravity test measures coarse aggregate weight under three different sample conditions. When testing coarse aggregate of large nominal maximum size requiring large test samples, it may be more convenient to perform the test on two or more. Step instructions to perform clay lump test on representative coarse aggregate samples. Determining the specific gravities of coarse aggregates. Eliminating the guesswork a new absorptionspecific gravity test for aggregate. Improved test methods for specific gravity and absorption. So the determination of specific gravity of fine aggregate is very essential.
746 695 593 1031 388 1544 1551 124 1314 1538 801 1489 708 229 704 1546 1265 644 968 313 1122 836 554 382 5 691 859 523 445 1474 1069 1079 1292 433 437 670 618 679 389 1173 928 739