### Specific Gravity of Coarse Aggregates: Its Importance

Apparent Specific Gravity of Aggregates: It is calculated by measuring the weight of the oven-dry aggregate divided by its absolute volume excluding the natural voids in the aggregate particles. It is the realistic quantified data validated to use for the calculation of concrete mix proportioning.

More### Characteristics of Aggregates: Shape, Size & Specific Gravity

The Fine Aggregate Test (ASTM C128 and AASHTO T 84) is a comparison of sample masses in oven-dry, saturated surface-dry (SSD), and immersed conditions. This test method offers alternate procedures to determine specific gravity. Either a volumetric flask or a simple pycnometer can be used for the gravimetric procedure. For the volumetric procedure, a special Le Chatelier flask is needed.

More### Specific Gravity of Aggregate

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.

More### Specific gravity and absorption of coarse aggregate The

Apr 19, 2020· To determine the saturated surface-dry (SSD) and bulk specific gravity (relative density)and water absorption of natural mineral aggregates used in Portland cement concrete, where ASTM-C-127 standard was used Apparatus Sample container. Water tank. Balance, with a minimum capacity of 4000g. Suspended apparatus. Drying oven.

More### SPECIFIC GRAVITY OF AGGREGATE

Weight of saturated aggregates in air: W3 g 4 Weight of oven dry aggregates in air: W4 g 5 Apparent Specific Gravity: W4 / [W4 (W1 W2 )] 6 Bulk Specific Gravity: W4 / [W3 (W1 W2 )] Table 1 : Observation Table for Specific gravity of Aggregate coarser than 6.3 mm S. No. Description Observed values 1 Weight of Pycnometer in air: W1 g 2

More### AGGREGATE BLENDING, ABSORPTION, & SPECIFIC GRAVITY

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, SSD aggregate and water = 982.3 S = mass SSD aggregate = 500.1

More### SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85

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

More### SPECIFIC GRAVITY OF AGGREGATE

Weight of saturated aggregates in air: W3 g 4 Weight of oven dry aggregates in air: W4 g 5 Apparent Specific Gravity: W4 / [W4 (W1 W2 )] 6 Bulk Specific Gravity: W4 / [W3 (W1 W2 )] Table 1 : Observation Table for Specific gravity of Aggregate coarser than 6.3 mm S. No. Description Observed values 1 Weight of Pycnometer in air: W1 g 2

More### Specific gravity and absorption of coarse aggregate The

To determine the saturated surface-dry (SSD) and bulk specific gravity (relative density)and water absorption of natural mineral aggregates used in Portland cement concrete, where ASTM-C-127 standard was used Apparatus Sample container. Water tank. Balance, with a minimum capacity of 4000g. Suspended apparatus. Drying oven.

More### SPECIFIC GRAVITY AND ABSORPTION OF FINE AGGREGATE

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.

More### SPECIFIC GRAVITY AND ABSORPTION OF COARSE

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 gas-free distilled water at a stated temperature. Apparent Specific Gravity (G

More### Standard Test Method for Relative Density (Specific

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 surface-dry condition, that is, if its absorption has been satisfied.

More### Solved: The specific gravity and absorption test (ASTM

aggregate and the following data were obtained: Mass of SSD sand = 500.0 g. Mass of pycnometer with water only = 623.0 g. Mass of pycnometer with sand and water = 938.2 g. Mass of dry sand = 495.5 g. Calculate the specific gravity values (dry bulk, SSD, and apparent) and the absorption of the fine aggregate.

More### Specific Gravity of a Blended Aggregate Memphis

Specific Gravity (Relative Density) of a Blended Aggregate The specific gravity of a blended aggregate is not simply the weighted average of the specific gravities of the individual components. To derive an appropriate equation, let’s assume a blend of two aggregates (A and B).

More### Properties of Aggregates and its Values for use in

Contents:Properties of Aggregates and its Values for use in Construction1. Aggregates: Bulk Density, Specific Gravity and Voids2. Aggregates: Limiting Values of Mechanical Properties3. Approximate Water Absorption of Aggregates, by Weight4. Limits of Deleterious Materials (Percentage by Weight, Maximum)5. Bulking of Sands for Various Moisture Contents6. Surface Water Carried by Aggregates

More### Solved: Q.2 Tests On A Coarse Aggregate Sample For Determi

Q.2 Tests on a coarse aggregate sample for determining the specific gravity gave the following results: Weight of oven-dry sample in air Weight of saturated surface dry aggregate in air Weight of saturated surface dry aggregate in water = 3550 g = 3625 g = 2250 g Calculate the following: a) Apparent specific gravity.

More### SPECIFIC GRAVITY AND ABSORPTION OF FINE

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

More### Properties of Aggregates Civil Snapshot

2 天前· 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

More### WHAT ARE THE PROPERTIES OF AGGREGATES FOR CONCRETE

Oct 01, 2016· Specific Gravity. The ratio of weight of oven dried aggregates maintained for 24 hours at a temperature of 100 to 110 0 C, 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

More### (PDF) Standard Test Method for Specific Gravity and

Bulk specific gravity (SSD) 0.007 0.020 10.3 If the specific gravity and absorption values were Apparent specific gravity 0.007 0.020 Absorption B, % 0.088 0.25 determined without first drying the aggregate, as permitted in Multilaboratory Precision: 8.2, it shall be noted in the report.

More### Specific Gravity Flask for Fine Aggregate.docx Specific

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. The SSDetect "directly measures" the saturated surface dry condition of the fine aggregate, which is done by way of an infrared light source "tuned" to water.

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