Table of Contents
- 1 What is bulk SSD specific gravity?
- 2 What is the difference between fine aggregate and coarse aggregate in respect of specific gravity and absorption?
- 3 What is the difference between absolute specific gravity and apparent specific gravity?
- 4 What is the bulk specific gravity of fine and coarse aggregates?
- 5 What is the difference between bulk density and apparent density?
- 6 What is the relationship between bulk density and dry density?
What is bulk SSD specific gravity?
Bulk SSD Specific Gravity: The ratio of the weight in air of a unit volume of aggregate, including the weight of water within the voids filled to the extent achieved by submerging in water for approximately 15 hours, to the weight in air of an equal volume of gas-free distilled water at the stated temperature.
What is the difference between fine aggregate and coarse aggregate in respect of specific gravity and absorption?
Fine aggregates are small size filler materials in construction. Coarse aggregates are larger size filler materials in construction. Fine aggregates are the particles that pass through 4.75 mm sieve and retain on 0.075 mm sieve. Coarse aggregates are the particles that retain on 4.75 mm sieve.
What is the difference between absolute specific gravity and apparent specific gravity?
Answer:True specific gravity is the ratio of unit weight of soil solids to that of water. But apparent specific gravity is the ratio of unit weight of total soil mass to that of water.
What is the difference between bulk density and specific gravity?
Specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. Bulk density is weight of a unit volume of a material to the same volume of water including voids.
What is meant by bulk specific gravity?
The bulk specific gravity is the ratio of the weight of a given volume of aggregate, including the permeable and impermeable voids in the particles, to the weight of an equal volume of water (Kandhal et al., 2000; Prowell and Baker, 2004; Sholar et al., 2005).
What is the bulk specific gravity of fine and coarse aggregates?
between about 2.400 and 3.000
Typically, aggregate used in HMA production will have a bulk specific gravity between about 2.400 and 3.000 with 2.700 being fairly typical of limestone.
What is the difference between bulk density and apparent density?
Apparent density is the bulk density of the powder. It provides the mass per unit volume of loose packed powders. A change in apparent density can also indicate a change in the surface roughness of the powder; for example, atomization satellites may reduce apparent density.
What is the relationship between bulk density and dry density?
Explanation: Bulk density (aka total density) is the total mass of the soil (ie mass of soil solids, water and air) per unit volume, while a dry density is mass of soil solids only per unit volume of the soil.
Why is bulk specific gravity important?
Bulk specific gravity of aggregate is important information for designing hot mix asphalt because it is used to calculate voids in mineral aggregate and voids filled with asphalt. Periodically, the aggregate is lightly tamped into a cone-shaped mold with 25 light drops of the tamper.
How is SSD weight calculated?
Simply stated, it is the unit weight of a saturated material divided by the unit weight of water and is computed as follows: Gs(ssd) = (1 + Absorption) x Gs(dry).