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SPECIFIC GRAVITY AND ABSORPTION OF COARSE AGGREGATE FOP FOR AASHTO T 85 Scope This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with AASHTO T 85-10 Specific gravity may be expressed as bulk B = SSD mass and C = weight in water Bulk specific gravity
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This chapter provides specific terminology that is essential for a physical understanding and methodical calculation of various degrees of saturation Information is also provided on alkali-aggregate reaction test methods and available data on the results of testing programs 3 1 Definition of Lightweight Aggregates
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The Effect of Aggregate Properties on Concrete Concrete is a mixture of cementious material aggregate and water Aggregate is commonly considered inert filler which accounts for 60 to 80 percent of the volume and 70 to 85 percent of the weight of concrete
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Specific gravity of major aggregates falls within the range of 2 6 to 2 9 Specific gravity values are also used while designing concrete mix Bulk Density It is defined as the weight of the aggregate required to fill a container of unit volume It is generally expressed in kg/litre Bulk density of aggregates depends upon the following 3 factors
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1 SPECIFIC GRAVITY AND ABSORPTION OF FINE AGGREGATES AASHTO T 84 GLOSSARY Absorption: The increase in mass due to water in the pores of the material 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
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specific gravity bulk saturated surface dry (SSD) specific gravity or apparent specific gravity The bulk (SSD) specific gravity and absorption are based on aggregate after 15 to 19 hours soaking in water This method is not intended to be used with lightweight aggregate 1 2 The specific gravity and absorption of coarse aggregate is normally
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DETERMINING UNIT MASS (WEIGHT) OF AGGREGATES TXDOT DESIGNATION: TEX-404-A CONSTRUCTION DIVISION 4 – 6 LAST REVIEWED: SEPTEMBER 2014 Note 1—Use standard gradation when dry loose unit mass fails the specification requirement at received gradation and note this on the test report 4 1 3 5 Place the sample on a smooth flat surface and mix
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EXPERIMENT NO 3 4 SPECIFIC GRAVITY (RELATIVE DENSITY) AND WATER ABSORPTION TEST FOR AGGREGATES RELATED THEORY Water Absorption Specific Gravity 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
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Fine aggregate is used in many fields in sites for many purposes So the determination of specific gravity of fine aggregate is very essential Specific gravity of fine aggregate can be defined as the ratio of the weight of given volume of coarse aggregate to the weight
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The specific gravity of all other materials are compared to water as a fraction heavier or fraction lighter density no matter how small or large the fraction is For example ammonium nitrate has a specific gravity (sg) of 0 73 while dry ammonium sulphate has a sg of 1 13 (1130 kilograms/cubic meter)
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specific gravity of material x unit weight of water For example the specific gravity of a dry coarse aggregate (Gs) is 2 65 The unit weight of water is 62 4-lb/cu ft The absolute volume of a 90-lb sample of the aggregate is: Absolute Volume = 90 lb / (2 65 x 62 4 lb/cu ft) = 0 544 cu ft The absolute volume of a concrete mix can be
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Sep 10 2017Specific Gravity is the ratio of a Weight of Volume of material (Your testing material) to the same Weight of Volume of water In simple words we are comparing the volume of our Testing material either it may be sand cement aggregate with the same volume of water at certain temperature
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unit weight of aggregate = 1450 to 1550 Kg/m3 unit weight of steel = 7850 kg/m3 unit weight of cement = 1440 kg/m3 unit weight of water = 981kg/m3 Is This Answer Correct ? 60 Yes : 20 No : Unit weight of brick? Sand? Aggregate? Steel? Cement? Water? Answer / balaji s e
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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 It is similar in nature to the fine aggregate specific
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Strength of concrete and mix design are independent of the composition of aggregate but durability may be affected Aggregates are classified based on specific gravity as heavyweight normal-weight and lightweight Normal weight aggregates make-up 90% of concrete used in the United States Shape and Texture
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SSDetect™ Bulk Specific Gravity and Absorption of Fine Aggregates Test System— H-3384 3F The SSDetect system is a two-part automated system that determines: Bulk Specific Gravity (dry) Bulk Specific Gravity (SSD) Apparent Specific Gravity and Absorption of the fine aggregate all in about one hour
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The specific weight also known as the unit weight is the weight per unit volume of a material A commonly used value is the specific weight of water on Earth at 4C which is 9 807 kN/m 3 or 62 43 lbf/ft 3 The terms specific gravity and less often specific weight are also used for relative density
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Oct 01 2016Specific Surface of Aggregate The surface area per unit weight of the material is termed as specific surface This is an indirect measure of the aggregate grading Specific surface increases with the reduction in the size of aggregate particle The specific surface area of the fine aggregate is very much more than that of coarse aggregate
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Structural Lightweight Aggregate All Rocks Are Not Created Equal: A Case Study of SLWA in Geotechnical Engineered Applications Imani Brodie Surratt E I Carolina Stalite Company About Stalite • Founded in 1961 in Salisbury NC • Manufacturing plant in Gold Hill NC • 700k tons of SLWA produced in 2016 • Largest facility in the world
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The SG-6 Specific Gravity Absorption of Coarse Aggregate Set includes the SG-7A Wire Basket with handle and the SG-8 polyethylene 24qt Water Container for weighing coarse aggregate samples while suspended in water Basket is No 8 stainless steel mesh 8x8in (203x203mm) Dia xH Inquire for baskets with No 4 No 6 No 12 or No 16 mesh sizes
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