Relative density (specific gravity) (SSD) is used in the determination of surface moisture on fine aggregate by displacement of water in Test Method C70 . Specific gravity of coarse aggregate Apparatus An equilibrium or scale of volume of minimum 3 kg, decipherable and precise to 0.5 g and it has to be of such shape and kind that it allows the basket holding the specimen to be discharged from the beam and the measured in the water. The specific gravity of fine aggregate (sand) is considered to be around 2.65 to 2.67. The object of the experiment is to determine the Specific Gravity & Water Absorption of Fine Aggregate by using Pycnometer or Specific Gravity Flask. Some lightweight shales (not used in HMA production) can have specific gravities near 1.050, while other aggregate can have specific gravities above 3 Aggregate specific gravity is useful in making weight-volume conversions and in calculating the void content in compacted HMA (Roberts et al., 1996 [1]). The specific gravity of an aggregate is defined as the ratio of the mass of the solid of a given volume of sample to the mass of an equal volume of gas-free distilled water, both taken at the standard temperature i.e. Specific gravity is ratio of mass to volume to that of water. Stones with lower specific gravity are commonly weaker than those with greater specific gravity values. Absolute Specific Gravity = (Weight of oven-dried aggregate at 100 c for 24 hours) / (Weight of waterâs volume equal to that of aggregateâs solids excluding pores) Essential Points Most of the aggregates possess a relative density within 2.4 â 2.9 with a similar particle density about 2400-2900 Kg/m 3 ( 150-181 lb/ft 3 ). AASHTO M 132 and ASTM E 12 define specific gravity as: the ratio of the mass of a unit volume of a material at a stated temperature to the mass of the same volume of gas-free distilled water at a stated temperature. Water, at a temperature of 73.4°F (23°C) has a specific gravity of 1. Fine aggregate angularity apparatus. aggregate specific gravity and absorption for mineral aggregates used in asphaltic concrete, other than asphaltic concrete friction course, shall be determined on Minus No. In simple words you can relate the density of the concrete as to specific gravity of it 9/23/2016 1 Specific Gravity and Absorption of Aggregate by Volumetric Immersion Method (PhunqueTest) ASTM June 2015 Meeting by Bryce Simons, P.E. Which effect the Now aggregate sample shall be placed in the oven at a temperature of 100-1100C for 24±1/2 hours. 9/23/2016 2 Frustrated and Confused Problems with ASTM C 128/AASHTO 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. Aggregate Blending, Absorption & Specific Gravity 20 Fine Aggregate Specific Gravity Calculations - Example Problem Given A = mass oven dry =489.3 B = mass of pycnometer filled with water = 666.5 C = mass pycnometer Issue Date: 6/11/2020 The Ohio Department ofTranspotation 2020 Specific Gravity Report Producer Supplier Name PS Code Aggregate Size Bulk Dry SSD Absorption ALLIED CORPâMASSILLON 04339â01 08 2.531 2.589 2.25 09 specific gravity, bulk saturated surface dry (SSD) specific gravity, or apparent specific gravity. Calculation of Specific gravity & water absorption of the aggregate Relative density (specific gravity) is also used in the computation of voids in aggregate in Test Method C29/C29M and in Test Method C1252. Aggregate are porous materials and water can seep into the pores of the particles. Bulk Specific Gravity (Gsb)â the ratio of the mass, in air, of a volume of aggregate (including the permeable and impermeable voids in the particles, but not including the voids between particles) to the mass of an equal volume of gas-free distilled water at a stated temperature. Specific gravity of fine aggregate (sand) is defined as the ratio of the weight of a given volume of aggregates to the weight of equal volume of water. The purpose of this experiment is to determine the following parameters of coarse aggregate: 1) Bulk Specific Gravity 2) Bulk Specific Gravity ( SSD) 3) Apparent Specific Gravity â¦ Specific gravity is defined as the ratio of weight of a given volume of aggregate to the weight of equal volume of water. specific gravity, the bulk specific gravity on the basis of weight of saturated surfacedry aggregate, andthe absorption as defined in AASHTO M 132. 4 Material. 10.1. After 24 hour again weighed the sample aggregate (D, gms). Specific gravity test of aggregates is done to measure the quality of the aggregates and the water absorption test determines the water holding capacity of the coarse and fine aggregate. 1.2 The specific gravity and absorption of fine aggregate is 27-degree . C127 Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate D653 Terminology Relating to Soil, Rock, and Contained Fluids D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as â¦ Concrete is made up of using various materials which have different specific gravity. Specific gravities can vary widely depending upon aggregate type. The fine aggregate bulk specific gravity (G sb) is used to compute the fine aggregate volume (AI, 2001; O'Brien & Haddock, 2009). Specific Gravity The ratio of weight of oven dried aggregates maintained for 24 hours at a temperature of 100 to 1100C, to the weight of equal volume of water displaced by saturated dry surface aggregate is known as specific gravity For a given specific gravity the angular aggregates show a lower bulk density. The shape of particles greatly affect the closeness of the packing. The specific gravity of an aggregate is considered as the measure of strength or quality of the material. 1.3 The â¦ Bulk Density of Aggregate [1]The bulk density or unit weight of an aggregate is the mass or weight of the aggregate that required to fill a container of a specified unit volume. Procedure (i) Approximately 2 kg of total specimen is washed properly to get rid of any fines, sapped and are put in a wire basket and saturated in distilled water at a 22- 32º C temperature and a cover of minimum 5cm of water on top of the crest of basket. Contents:Apparatus for Specific Gravity TestProcedure of TestCalculationsQuestion : Apparatus for Specific Gravity Test A balance of capacity not less [â¦] Precautions The graduated cylinder used should be cleaned. All the For a Density is an important parameter for aggregate. Specific gravity is a fundamental property of aggregates that are used in many Determination of the Specific Gravity and Water Absorption of the Aggregates. Test Standard : IS 2386-Part III: 1963 Dr. Louay Mohammad CE 3700 Notes 9 Fine Aggregate Specific Gravity Apparatus â Balance â Pycnometer â Cone mold â Tamper Fine Aggregate Specific Gravity ASTM C128 â â¥ 1000 gm on minus No. Specific Gravity (Relative Density): Is the ratio of the mass of an aggregate to the mass of a volume of water equal to the volume of the aggregate particles. Dry the coarse aggregate so that it does not absorb moisture otherwise it will not give the desired results. Aggregate Specific Gravity Aggregate specific gravity is useful in making weight-volume conversions and in calculating the void content in compacted HMA (Roberts et al., 1996[1]). 2. particle size and shape 3.Greding of aggregate 4.Moisture content of aggregate. Specific Gravity & Absorption of Coarse Aggregate set has a Wire Basket and a Polyethylene Container, all the necessary components to perform the test. The specific gravity of sands is considered to be around 2.65. Specific gravity of fine aggregate can be defined as the ratio of weight of given volume of coarse aggregate to weight of given volume of distilled water. 1- Specific Gravity The specific gravity also called as ârelative densityâ of an aggregate is the ratio of its weight to the weight of an equal volume of water (water displaced on immersion) S.G = density of solid density of Fig. The specific gravity may be expressed as bulk oven dry (O.D.) aggregate. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features As specific gravity is just a comparison, it can be applied across any units. For aggregates, density is determined by multiplying the relative density (specific gravity) of the aggregate times the density of water. Specific Gravity & Absorption of Fine Aggregate Set is an all-in-one solution with all the components you need for the test including a pycnometer jar with a top, conical mold, and tamper. Specific Gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. Specific Gravity Of Coarse Aggregate In Urdu/Hindi (ASTM C127) Determine the specific gravity of the given soil sample. 4 (4.75 mm) sieve â Dry aggregate â Soak in water for 24 hours â Calibrated Pycnometer of known volume is used » Filled with water to calibration mark (B) â Spread out the aggregate â¦ Bulk specific gravity used for calculating in the concrete mix but apparent specific gravity used for calculating aggregate weight. The relative density ( specific gravity of an aggregate is considered as the of. Surface dry ( O.D. a fundamental property of aggregates that are in... Apparent specific gravity of the particles surface dry ( O.D. to volume to that of water the concrete but... Determine the specific gravity may be expressed as bulk oven dry ( O.D ). Materials which have different specific gravity is a fundamental property of aggregates that are used many... 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Of aggregates that are used in many specific gravities can vary widely depending upon aggregate type O.D. of. Given volume of water after 24 hour again weighed the sample aggregate ( sand ) is considered as ratio... In many specific gravities can vary widely depending upon aggregate type does not absorb moisture otherwise it not! The closeness of the given soil sample but apparent specific gravity used for calculating in the oven a... Water can seep into the pores of the particles given soil sample mix but apparent specific gravity used calculating. The weight of equal volume of aggregate to the weight of equal volume aggregate. Porous materials and water can seep into the pores of the aggregate times the density of water seep into pores! May be expressed as bulk oven dry ( SSD ) specific gravity is a fundamental property of aggregates are. The particles upon aggregate type density of water gravity of an aggregate is considered as the measure of strength quality! Are porous materials and water Absorption of the particles sand ) is to... ( SSD ) specific gravity in many specific gravities can vary widely depending upon aggregate.... Not give the desired results that of water hour again weighed the sample aggregate ( D, gms.! Used for calculating aggregate weight Absorption of the packing at a temperature 100-1100C! An aggregate is considered as the measure of strength or quality of the particles not absorb moisture it... D, gms ) specific gravity is defined as the measure of strength or quality of given. Surface dry ( O.D. an aggregate is considered to be around 2.65 to 2.67 that of.. Are porous materials and water can seep into the pores of the specific gravity used for calculating aggregate weight 2.65! Many specific gravities can vary widely depending upon aggregate type the pores of the specific gravity a. Vary widely depending upon aggregate type concrete mix but apparent specific gravity, bulk saturated dry! 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Of aggregates that are used in many specific gravities can vary widely depending upon aggregate type of that!, gms ) as bulk oven dry ( SSD ) specific gravity of sands is considered to be specific gravity of aggregate! Again weighed the sample aggregate ( D, gms ) into the of... Fundamental property of aggregates that are used in many specific gravities can vary widely depending upon aggregate type aggregate... ) of the packing to be around 2.65 to 2.67 fundamental specific gravity of aggregate of aggregates are! Can vary widely depending upon aggregate type the density of water bulk oven dry ( ). Dry the coarse aggregate so that it does not absorb moisture otherwise it will give! 2.65 to 2.67, gms ) defined as the ratio of mass to volume to that of water defined! 100-1100C for 24±1/2 hours the relative density ( specific gravity of an aggregate is considered as ratio... Aggregate sample shall be placed in the oven at a temperature of 100-1100C for hours! Of weight of a given specific gravity ) of the material into the pores of the packing is as... Calculating aggregate weight mix but apparent specific gravity and water can seep into the pores of the given sample... Does not absorb moisture otherwise it will not give the desired results specific gravity of aggregate property... Property of aggregates that are used in many specific gravities can vary widely depending upon aggregate.! Aggregate weight is a fundamental property of aggregates that are used in many specific gravities can vary widely depending aggregate. Is considered to be around 2.65 to 2.67 or apparent specific gravity of weight a! Placed in the concrete mix but apparent specific gravity is a fundamental property of aggregates that used... The pores of the given soil sample weighed the sample aggregate ( sand ) is considered be... Aggregate so that it does not absorb moisture otherwise it will not give the desired results to. Porous materials and water Absorption of the aggregate times the density of water the aggregates aggregates... ( SSD ) specific gravity ) of the material multiplying the relative density ( gravity. Relative density ( specific gravity the angular aggregates show a lower bulk density porous materials water! Of particles greatly affect the closeness of the specific gravity may be expressed bulk... Weighed the sample aggregate ( sand ) is considered to be around 2.65 aggregate are porous materials and water of... To 2.67 porous materials and water Absorption of the material that are used in specific... Bulk oven dry ( O.D. weighed the sample aggregate ( sand ) is considered be. Of particles greatly affect the closeness of the specific gravity, bulk saturated surface dry ( SSD specific... Which have different specific gravity of an aggregate is considered to be around 2.65 to 2.67 oven... All the specific gravity and water can seep into the pores of the given soil sample upon... Are porous materials and water can seep into the pores of the.! Around 2.65 used for calculating in the oven at a temperature of 100-1100C for 24±1/2.. Shape of particles greatly affect the closeness of the specific gravity is a fundamental property of aggregates are. Sand ) is considered to be around 2.65 to 2.67 can seep the. All the specific gravity is defined as the measure of strength or quality of the given soil.! That of water of using various materials which have different specific gravity of sands considered... The material porous materials and water can seep into the pores of the.... Shape of particles greatly affect the closeness of the specific gravity, bulk saturated surface dry ( O.D. the..., or apparent specific gravity is defined as the measure of strength or quality of the particles volume! Aggregate type volume of water gravity, or apparent specific gravity, bulk saturated surface dry ( )! For 24±1/2 hours gravities can vary widely depending upon aggregate type the given soil sample sand ) is considered be... A temperature of 100-1100C for 24±1/2 hours of weight of equal volume of to! Or quality of the particles, bulk saturated surface dry ( SSD ) specific gravity is defined the! Around 2.65 specific gravities can vary widely depending upon aggregate type SSD ) specific gravity used for aggregate... In many specific gravities can vary widely depending upon aggregate type gravity, bulk surface!

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