How do you find the specific gravity of coarse aggregate?
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.
What is the specific gravity of coarse aggregate?
The specific gravity of aggregates normally used in road construction ranges from about 2.5 to 3.0 with an average of about 2.68. Water absorption shall not be more than 0.6 per unit by weight.
What is the value of specific gravity of coarse aggregate?
The specific gravity of aggregates normally used in construction ranges from about 2.5 to 3.0 with an average value of about 2.68.
What is the specific gravity of fine aggregate and coarse aggregate?
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 specific gravity of fine aggregate (sand) is considered to be around 2.65 to 2.67. Sand particles composed of quartz have a specific gravity between 2.65 to 2.67.
What are the limitations in determination of specific gravity using Pycnometer?
Two main reasons for error in the calculation are weighing inaccuracies and the presence of entrapped air. Entrapped air have to be eliminated completely before testing the sample. The weighing balance has to be checked before conducting the test. The soil sample taken for testing have to be completely oven dried.
What is the capacity of Pycnometer bottle?
Specific Gravity Bottle Capacity: 1000ml (1Ltr.) With Rubber O-ring & Brass Cap.
Is code for specific gravity by Pycnometer?
: 2720
To determine the specific gravity of soil solids by Pycnometer bottle method. Specific gravity is the ratio of the mass of unit volume of soil at a stated temperature to the mass of the same volume of gas-free distilled water at a stated temperature. Specification: This test is specified in IS: 2720 (Part 4) – 1985.
How do you use a pycnometer to measure specific gravity?
Procedure for Specific Gravity of Soil by Pycnometer Method
- Clean and dry the Pycnometer.
- Mark the cap and Pycnometer with a vertical line parallel to the axis of the Pycnometer to ensure that the cap is screwed to the same mark each time.
- Unscrew the cap and place about 200 g of oven dried soil in the Pycnometer.
How does a pycnometer determine specific gravity?
To determine the specific gravity of soil solids by Pycnometer bottle method. Specific gravity is the ratio of the mass of unit volume of soil at a stated temperature to the mass of the same volume of gas-free distilled water at a stated temperature. Specification: This test is specified in IS: 2720 (Part 4) – 1985.
How does a pycnometer measure specific gravity?
Which is the standard coarse aggregate specific gravity test?
The standard coarse aggregate specific gravity and absorption test is: AASHTO T 85 and ASTM C 127: Specific Gravity and Absorption of Coarse Aggregate
What is the capacity of a pycnometer?
-Pycnometer: a volumetric flask with a minimum capacity of 500 ml -Balance: with 0.01 g readability and a capacity of at least 1000 g. -Drying Oven:capable of maintaining a uniform temperature of 110 +- 5°C. -Thermometer: with a –1 to 60°C range. -Entrapped Air Removal Apparatus: Hot Plate and/or Vacuum System.
What’s the best way to calibrate a pycnometer?
– Fill the pycnometer with deaired water (by heat and/or vacuum) to the calibration mark. – If heat has been used, allow the specimen to cool to approximately room temperature. – Adjust the water to the calibration mark and dry the rim using a paper towel. Be sure the entire exterior of the flask is dry.
What to do if slurry is not formed in pycnometer?
Agitate the water until a slurry is formed. Rinse any soil adhering to the pycnometer into the slurry. If the slurry is not formed but you have a viscous paste, use a pycnometer with a larger volume or reduce the mass of soil used.