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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. 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

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 62.4lb/cu ft. The absolute volume of a 90lb sample of the aggregate is: Absolute Volume = 90 lb / (2.65 x 62.4 lb/cu ft) = 0.544 cu ft.

Dry the test sample in the oven to constant mass at a temperature of 110ۯ °C, cool in air at room temperature 1 to 3 h, or until the aggregate has cooled to a temperature that is comfortable to handle (approximately 50 °C), and determine the mass in order to calculate the oven specific gravity of

aggregate. The specific gravity may be expressed as bulk oven dry (O.D.) specific gravity, bulk saturated surface dry (SSD) specific gravity, or apparent specific gravity. 1.2 The specific gravity and absorption of fine aggregate is normally determined on pass No. 4 material.

Dec 05, 2015 · Laboratory Test Procedure for Determining Bulk Specific Gravity of Superpave Water Content Dry Density Relation Specific gravity and absorption of coarse aggregates V31

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 of aggregates. Specific gravities are primarily of two types. Apparent specific gravity Bulk specific gravity

Saturated Surface Dry (SSD) – condition of an aggregate particle when the permeable voids are filled with water, but no water is present on exposed surfaces. Specific Gravity – the ratio of the mass, in air, of a volume of a material to the mass of the same volume of gasfree distilledwater at a stated temperature. Apparent Specific Gravity (G

Relative density (specific gravity) (SSD) is used in the determination of surface moisture on fine aggregate by displacement of water in Test Method C70. Relative density (specific gravity) (SSD) is used if the aggregate is in a saturated surfacedry condition, that is, if its absorption has been satisfied.

Aggregate Blending, Absorption & Specific Gravity 15 Fine Aggregate Specific Gravity • ASTM C128 – Dry aggregate – Soak in water for 24 hours – Spread out and dry to SSD – Add 500 g of SSD aggregate to pycnometer of known volume • Prefilled with some water – Add more water and agitate until air bubbles have been removed

Specific gravity test of aggregates is done to measure the strength or quality of the material while water absorption test determines the water holding capacity of the coarse and fine aggregates. Specific Gravity is the ratio of the weight of a given volume of aggregate to the weight of an

COARSE AGGREGATE SPECIFIC GRAVITY WORKSHEET. North Dakota Department of Transportation, Materials and Research. SFN 10081 (62019) Pit Loion Laboratory Number Owner Project Number Sampled From PCN Submitted By Date Received. Weight of oven dry sample in air. grams (A) grams (B) Weight of saturated sample in water. grams (C)

It test measures a sample based on a certain condition. Given below is the simple Bulk specific gravity formula to determine the bulk specific gravity of coarse aggregate based on known values of weight of dry piece in a fluid, a density of a fluid, a weight of dry piece soaked in fluid and weight of dry piece soaked & immersed in a fluid.

The object of the experiment is to determine the Specific Gravity & Water Absorption of Coarse Aggregate. Specific Gravity is the ratio of the mass of unit volume of aggregate at a stated temperature to the mass of the same volume of gas free distilled water at a stated temperature. Dry the vessel from outside. Now take the weight.

Specific Gravity is defined as the ratio of Weight of Aggregate to the Weight of equal Volume of water. The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. Aggregates having low specific gravity are generally weaker than those with high specific gravity.

Apr 09, 2017 · Objective: For assessment of the specific gravity of specified specimen of fine and coarse aggregates. 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 []

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

SSDetect™ Bulk Specific Gravity and Absorption of Fine Aggregates Test System— H3384.3F The SSDetect system is a twopart, automated system that determines: Bulk Specific Gravity (dry), Bulk Specific Gravity (SSD), Apparent Specific Gravity, and Absorption of the fine aggregate

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 gravity test.

The percent of water necessary to add to the aggregate to obtain SSD is called as water absorption. Use our online Specific gravity and water absorption test calculator to do water absorption of aggregates calculation based on the weight of dry piece soaked in fluid and weight of dry piece in the fluid.

The specific gravity of aggregates indirectly measures its density hence it is the most essential parameter of strength or quality of the aggregates. Higher the specific gravity, higher is the strength. It is due to higher specific gravity there would be higher compressive strength of aggregates and hence it passes on to the concrete. 02.

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 of aggregates. Specific gravities are primarily of two types. Apparent specific gravity Bulk specific gravity