Coarse aggregate proficiency samples 201 a and 202 b. Standard test method for specific gravity and absorption of. Standard test method for sieve analysis of fine and coarse. Various test which are done on aggregates are listed below. Aldot175 method of stockpiling coarse aggregate for all purposes 3. Method of test for soil aggregate sample preparation. Specific gravity is defined as the ratio of weight of aggregate to the weight of equal volume of water. In case in water absorption is higher than 2% than soundness test is required. Aggregates types of aggregates coarse aggregate, fine. There are many tests which are conducted to check the quality of aggregates. Experimental investigation of concrete using coconut shell. Sieve sizes percent passing, by mass 100 80 60 40 20 0.
The function of the coarse aggregate is to act as the main loadbearing component of the concrete. Hirsch associate research engineer research report number 711 deleterious materials in concrete research project number 256371 sponsored by the texas highway department. January 2020 table 1minimum size of samples nominal maximum aggregate size1 minimum weight of field sample, g lb. Coarse aggregate is the portion of the concrete which is made up of the larger stones embedded in the mix. Ct 201 june 1, 2008 pdf ct 201 september 1, 1998 pdf ct 202 november 1, 2011 pdf method of test for sieve analysis of fine and coarse aggregates. Coarse aggregate specific gravity and absorption for mineral. Place wet material in a drying pan of known tare weight.
The bulk density and void percentage of aggregate can be evaluated using standard test methods of applicable codes such as astm c 29c29m17a, is. So the determination of specific gravity of fine aggregate is very essential. Compressive strength required for 28 days 20mpa maximum size of aggregate 20mm. 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. Test procedure for determining deleterious material and decantation test for coarse aggregates bituminous mixtures txdot designation. This manual has the current versions of our laboratory test procedures. The aggregates should therefore have sufficient toughness to resist their disintegration due to impact.
Aggregates are very important component of concrete, so the quality really matters when it comes to aggregates. Fine aggregate is used in many fields in sites for many purposes. To determine the particle size distribution of fine and coarse aggregates by sieving as per is. This characteristic is measured by impact value test.
Water absorption test for course aggregate, fine aggregate. Astm d4791 standard test method for flat particles, elongated particles, or flat and elongated particles in coarse aggregate 3. That aggregate is made of fine sand and coarse gravel. However, if a test was identical to an aashto, ast, or mftp procedure it was not m duplicated in this manual. Laboratory tests for predicting coarse aggregate performance. Aldot239 method of sampling and testing riprap stone classes 1 through 5 3. This edition completely replacesy 201the 9 labofebruarratory manual of test procedures. The standard testing procedure for this is the american society of testing.
Specific gravity of fine aggregatetest on aggregates. How are sieve analysis tests of coarse aggregates performed. The evaluation of the conventional and the alternative tests. Determination of aggregate impact value impact test on. Weigh and record the weight of the wet material and pan as b to the nearest 0. The fine aggregate serve the purpose of filling all the open space in between the coarse particles. The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load. Crushed aggregate have irregular, angular particles that tend to interlock when compacted or consolidated. Sample size 2 kg or less, readability and sensitivity to 0. Range of particle sizes found in aggregate for use in concrete. Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydrauliccement concrete, or iron blastfurnace slag, used with a hydraulic cementing medium to produce either concrete or mortar. The crushed stone or crushed gravel aggregate make the asphalt or concrete mix somewhat difficult to place. Unconfined freezethaw test for coarse aggregate mto ls614, 2.
There are four determinations that may be made from this procedure. Bulk density and void percentage test for aggregates the bulk density and void percentage of aggregate can be evaluated using standard test methods of applicable codes such as astm c 29c29m17a, is. Test method 211, the coarse aggregate specific gravity and absorption shall be performed on plus no. Determining deleterious material and decantation test for. Making a sieve analysis test of coarse aggregate in a laboratory. Aggregate size d maximum mm test portion mass minimum kg 63 40 32 10 16 2,6 8. To improve the workability, many mixes contain both angular and round particles. There are several reasons for specifying grading limits and nominal maximum aggregate size. Bulk specific gravity gsb also known as bulk dry specific gravity. Flakiness and elongation index of aggregate youtube. The grading is determined in accordance with astm c 6, sieve or screen analysis of fine and coarse aggregates. It includes gravel, crushed rock, sand, recycled concrete, slag, and synthetic aggregate. This standard is issued under the fixed designation c 127. The effects of aggregate type, size, and content on the behavior of normal and highstrength concrete, and the relationships between compressive strength, flexural strength, and fracture energy are discussed.
Test procedure for sieve analysis of fine and coarse aggregates txdot designation. Aggregates are coarse particulate rocklike material consisting of a collection of particles ranging in size from 50 mm. Feb 01, 2014 the function of the coarse aggregate is to act as the main loadbearing component of the concrete. Coarse aggregate as herein referenced will be for either plus no. Resistance of coarse aggregate to degradation by abrasion in the microdeval apparatus, aashto t32712 or astm d692817. Coarse aggregate for portland cement concrete shall consist of crushed basalt free of adherent coatings. References california test 202 sieve analysis of fine and coarse aggregates california test 217 sand equivalent. Bulk density and voias of coarse aggregate duration. Scope the cleanness test provides an indication of the relative proportions of claysized material clinging to coarse aggregates or screenings. W a is dry weight of aggregate the weight in g of ovendried aggregate in air w b is weight of aggregate immersed in water the weight in g of the saturated surkedry aggregate in air note. The concrete mixtures incorporate either basalt or crushed limestone, aggregate sizes of 12 mm h in. Method of test for determining total moisture and free. Correlation of concrete properties with tests for clay. Bulk density and void percentage test for aggregates.
Coarse aggregate specific gravity pavement interactive. Apr 07, 20 flakiness and elongation index of aggregate. Pavement interactive was developed by the pavement tools consortium, a partnership between several state dots, the fhwa, and the university of washington, as part of their effort to further develop and use computerbased pavement tools. Standard test methods for uncompacted void content of fine. Standard test method for sieve analysis of fine and coarse aggregates from different sources. Method of test for sieve analysis of fine and coarse aggregate dotd designation. The manual was prepared by committee c09 on concrete and concreteaggregates and has been accepted. Pdf standard test method for sieve analysis of fine and. 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. Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydrauliccement concrete, or iron blast. California test methods version selection caltrans. 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. Overview the coarse aggregate angularity caa test is a method of determining the angularity of coarse aggregate.
The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. Scope this method of test is used to determine the particle size distribution of aggregates by dry sieving only. Coarse aggregate is also described by its bulk density, which is a property that can easily be tested in the laboratory. By passing the sample downward through a series of standard sieves, each of decreasing size openings, the aggreg. Water absorption shall not be more than 2% per unit by weight. Aggregates having low specific gravity are generally weaker than those with high specific gravity. When measured on any aggregate of a known grading, void content provides an indication of that aggregates angularity, sphericity, and surface texture compared with other fine aggregates tested in the same grading. Those particles that are predominantly retained on the 4. This test method determines the specific gravity of coarse aggregates that have been soaked for a period of 15 hours figure 1. It is similar in nature to the fine aggregate specific gravity test.
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