What is the bulk specific gravity?
Table of Contents
What is the bulk specific gravity?
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 of gas-free distilled water at the stated temperature.
How do you calculate specific gravity of asphalt?
Theoretical maximum specific gravity is determined by taking a sample of loose HMA (i.e., not compacted), weighing it and then determining its volume by calculating the volume of water it displaces (Figure 1). Theoretical maximum specific gravity is then the sample weight divided by its volume.
What is the API gravity of asphalt?
-3 to 108
Asphalt has API gravity values ranging from -3 to 108, with 25 to 40% oil content and 60 to 75% asphaltenes and resin (tar) content (Figure 4). …
What is the standard density of asphalt?
145 lb/ft3
Standard density for asphalt is 145 lb/ft3 (2322 kg/m3). Multiply the volume by the density (in the same units) to get the weight.
Why is bulk specific gravity important for aggregates?
5.9. 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.
What is bulk SSD specific gravity?
Bulk SSD Specific Gravity (Gsb SSD): 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 a stated temperature.
What is the specific gravity of asphalt concrete?
around 1.03
The specific gravity at 15.6° C (60° F) is commonly used when buying/selling asphalt cements. A typical specific gravity for asphalt is around 1.03.
What is the bulk density of asphalt?
2.200 to 2.500
Typical values for bulk specific gravity range from 2.200 to 2.500 depending upon the bulk specific gravity of the aggregate, the asphalt binder content, and the amount of compaction.
How many m3 are in a tonne of asphalt?
The following density conversion factors for estimating the amount of material needed once compacted are: Granular A & B = 2.4 tonnes/m3. ¾” Clear Stone = 1.8 tonnes/m3. Asphalt – 2.5 tonnes/m3.
What is the difference between bulk and apparent specific gravity?
The bulk or volume specific gravity is based upon the volume as a whole–i.e., the solid material with all included pores. The apparent specific gravity is based upon the volume of the solid material plus the volume of the sealed pores.
Is bulk density the same as specific gravity?
Specific gravity (SG) and bulk density (BD) are physical tests for an object. 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 does 1 ton of asphalt weigh?
According to Asphalt Institute, 2,000 pounds equals 1 ton. Continuing the example, the pound value will be divided by 2,000 to determine the amount in tons: 5,920 pounds of asphalt mix/2,000 = 2.96 tons.
How do you convert specific gravity to bulk density?
Converting a specific gravity into a density is as simple as multiply the SG by the reference density for which it was based. In most cases, this is the density of water, and therefore your multiply the SG by 1 to yield your density in g/cm^3.
