IS 2386-3 (1963): Methods of test for aggregates for concrete, Part 3: Specific gravity, density, voids, absorption and bulking [CED 2: Cement and Concrete] IS : 2386 ( Part III ) - 1963 ( Reaffirmed 1990 ) Indian Standard METHODS OF TEST FOR AGGREGATES FOR CQNCRETE PART Ill SPECIFIC GRAVITY, DENSITY, VOIDS‘, ABSORPTldN AND BULKING ( Eighth Reprint MARCH 1997 ) 1 i JJDC 691.322 : … help of this you can easily perform the test for specific gravity of Immerse the wire basket in distilled water, Determination of Specific Gravity of Coarse Aggregate , IS: 2386 (Part 3): 1963 3. They are as follows: Figure 1 Coarse Aggregate Gravity Apparatus A. How to Find Aggregate Crushing Value and Its Test Procedure? Gravity x 1000 Immediately, after immersion, remove the entrapped air from the sample by lifting the basket containing aggregates 25 mm above from the base of the tank and allow it to drop again. 2386 (Part 3): 1963, Methods of test for aggregates for concrete (Determination In the concrete technology, specific gravity of aggregates is essential in calculation of compacting factor in connection with the workability measurements. Aggregates having higher specific gravity are Immediately after immersion, remove the So, it is necessary to know all the properties of aggregates such as its shape, size, specific gravity, water absorption, flakiness, surface texture, abrasion, and skid resistance etc. Copyright 2020 GharPedia. Weigh the wire basket and aggregates at the Specific Gravity Test of Coarse Aggregate:-, Container S c = specific gravity of cement. The Specific gravity of fine aggregate was also accurate. The weight of sample aggregates is taken as per the below table. This property helps in a general Apparatus for Specific Gravity and Water Absorption Test of Coarse Aggregate. H) Weight of fine aggregate= E x Volume of Fine Aggregate x Specific Gravity of Fine Aggregate x 1000 = 0.693 x 0.46 x 2.517 x 1000 = 802.36 kg/m³. According to ‘A. A number in parentheses indicates the year of The relative density (specific gravity) of an aggregate is the ratio of its mass to the mass of an equal volume of water. IS 2386-3: Methods of test for aggregates for concrete, Part 3: Specific gravity, density, voids, absorption and bulking Item Preview How to Choose the Right Type of Wood for Log Cabin? EXPERIMENT NO. (4.75mm, 10mm, 12.5mm, 20mm, 40mm) Physical Prosperities of Aggregate : Grading Grain size distribution for concrete mixes that will provide a dense strong mixture. 07. 0 to 10 percent passed from IS sieve . specific gravity (G sa). The aggregates The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. According to the ‘Oxford Dictionary of Construction, Surveying, & Civil Engineering’, specific gravity is also known as relative density. It is the realistic quantified data validated to use for the calculation of concrete mix proportioning. It is similar in nature to the coarse aggregate specific gravity test. Here Standard test method for the determination of relative density (i.e. Saturated surface-dry (SSD, water fills the aggregate por… Then remove aggregates from the oven and cool in an airtight container. Oven-dry (no water in sample). She is passionate about sharing knowledge. The sample should be washed to remove fine aggregates. specific gravity of an aggregate is considered as the measure of strength or Some lightweight shales (not used in HMA production) can have specific gravities near 1.050, while other aggregate can have specific gravities above 3.000. Equipment and Apparatus: Specific Gravity of Cement Apparatus. MIX Proportion by Volume: Cement = 318 kg/m³ The volume and weight of one Marshall specimen was found to be 475 cc and 1100 gm. IS 455:1989 Specification for Portland slag cement. However high specific gravity is considered as an indication of high strength. For the aggregates between 40 mm and 10 mm, both Method I & II can be used. generally considered as having higher strength and aggregates having low 06. Remember the concrete density and hence its strength significantly depends on the specific gravity. Specific gravities are primarily of two types. Assuming absorption of bitumen in aggregate is zero, find Vv, Vb, VMA and VFB. After that, empty the aggregates from the basket on the dry clothes and return the empty basket to the water, jolt it 25 times and weigh in water. She likes reading and travelling. before using aggregates for any project. For the volumetric procedure, a special Le Chatelier flask is needed. Next, place the aggregates in the oven on the shallow tray at a temperature of 100 to 110°C and maintain this temperature for next 24 ± 1/2 hours. Then the basket and the sample are jolted and weighed in the water at a temperature of 22 to 32°C. Submerg… quality of the material. 6 Moisture content of coarse and fine aggregate : NIL 7 Specific gravity of Chemical admixture : 1.08 Aggregate properties Sieve analysis of coarse aggregate Conforming to Table 7 page no 6 of IS 383 2016 i). 1 SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85 GLOSSARY Absorption: The increase in weight due to water contained in the pores of the material. Specific Gravity is defined as ratio of weight of solid to the weight of an equal volume of gas free distilled water (no dissolved air/impurities) at a stated temperature. As everyone knows cement, sand, and aggregates are the main components of concrete. Classification of Aggregates Based on Size, Flakiness Index Test on Aggregates for Shape, Method II – Aggregates between 40 mm and 10 mm, Method III – Aggregates smaller than 10 mm. Then the remaining value is the volume of the total aggregates. 02. The specific gravity will first depend upon the basic chemistry of rock and then on the amount of pores or voids within it. According to ‘IS: 383 – 1970’ (Specification for Coarse and Fine Aggregates from Natural Sources for Concrete), granite, basalt, sandstone, limestone, schist, granulite, gneiss, marble, gabbro, dolerite, rhyolite are popular rocks used for obtaining aggregates. Bulk Specific Gravity (also known as Bulk Dry Specific Gravity): 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 Since the aggregate generally contains voids, there are different types of specific gravities. specific gravity are generally considered as having weaker strength. Oven: A well-ventilated oven, which can be controlled thermostatically and it maintains a temperature of 100 to 110 ˚C. Density is the ratio between the mass and volume of the material we are testing. Note down the weight of basket suspended in water as A2. Specific Gravity is defined as ratio of weight of solid to the weight of an equal volume of gas free distilled water (no dissolved air/impurities) at a stated temperature. 3 & 4 SPECIFIC GRAVITY (RELATIVE DENSITY) AND WATER ABSORPTION TEST FOR AGGREGATES. These two parameters or property of aggregate play an important role in the mix design of concrete.As we know that aggregate occupies 70 to 80% volume of concrete, it testing becomes essential before use. Hemali Patel is a content writer at GharPedia. On the other side, for the determination of the apparent specific gravity, the volume of impermeable internal pore is added to the effective volume of the aggregates. Next, place the aggregates in the oven for 24 hours and measure the weight of oven-dried aggregates as C. Now calculate, Specific gravity= C/(B-A) and water absorption = 100 (B-C)/C according to this formula. 5-2) consist of one or a com-CHAPTER 5 Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) Specific Gravity. Such aggregates are weaker in comparison to the aggregates of higher specific gravity. Submerged in water (underwater). RELATED THEORY Water Absorption. 2.Specific gravity of aggregates is considered as an indication of strength. Image Courtesy: Image 1(a), Image 1(b), Image 4, Use below filters for find specific topics, You can use below filter for finding the nearby professionals. IS : 2386 (Part 3) – 1963 – Method of test for aggregates for concrete (Part I) Particle size and shape. Some harmful particles are lighter than the good particles in aggregates. in a shallow tray and heat to about 110 ºC in the oven for 24 hours. Here, we will see the test apparatus, procedure, calculations, and result recommendation of the specific gravity and water absorption of the aggregates as per the Method I in detail. RELATED THEORY Water Absorption. This standard is issued under the fixed designation C 127; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. To find fineness modulus of coarse aggregate we … To find fineness modulus of coarse aggregate we … Apparatus Required for Code to add this calci to your website . Determination of specific gravity and water absorption of aggregate having the size between 10 mm to 40 mm. 05. Uses of Coarse Aggregates: They are also used in the preparation of breaking moisture under slabs and vapour barrier. . It was 13% reduce from standard value 2.67 which is in the range from 2.5 to 3.0. This property helps in a general identification of aggregates. As per definition in ‘IS: 2386 (Part III) – 1963’, (Indian Standard- Methods of Test for Aggregates for Concrete – Specific Gravity, Density, Voids, Absorption, and Bulking). To know more read, Specific Gravity of Coarse Aggregates: Its Importance & Test Procedure. friends, you are welcomed in the world of. 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. The quality of aggregates imposes a significant impact on the properties of concrete like workability, strength, weight, durability etc. about 2.68. The aggregate gradation is determined by the fineness modulus method where aggregates are passing … Wall Tiles and Floor Tiles: What is the Difference? Relative Density = Mass of the Aggregate / Mass of equal volume of water. Specific Gravity. 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