How do you calculate specific gravity of fine aggregate?
The fine aggregate specific gravity test (Figure 1) is used to calculate the specific gravity of a fine 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 coarse aggregate specific gravity test.
Why is specific gravity of aggregate calculated?
Aggregate specific gravity is needed to determine weight-to-volume relationships and to calculate various volume-related quantities such as voids in mineral aggregate (VMA), and voids filled by asphalt (VFA).
How do you calculate the weight of fine aggregate?
The quantities of materials for 1 m3 of concrete production can be calculated as follows: The weight of cement required = 7.29 x 50 = 364.5 kg. Weight of fine aggregate (sand) = 1.5 x 364.5 = 546.75 kg. Weight of coarse aggregate = 3 x 364.5 = 1093.5 kg.
What is the specific gravity of fine aggregate and 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. 2.
Is code for specific gravity of aggregate?
Calculation. Specific gravity and water absorption of a coarse aggregate lab report is prepared after calculating above values. The specific gravity of coarse aggregate as per is code is 2.5 to 3. The water absorption of aggregate ranges from 0.1 to 2%.
What is the specific gravity of 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. 2. Specific gravity of aggregates is considered as an indication of strength.
What is 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.
Why specific gravity of fine aggregate is important?
Specific Gravity is important for several reasons. Some deleterious particles are lighter than the “good” aggregates. Specific gravity is critical information for the Hot Mix Asphalt Design Engineer. This value is used in calculating air voids, voids in mineral aggregate (VMA), and voids filled by asphalt (VFA).
What is specific gravity of fine 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.
What is the size of fine aggregate?
The size of fine aggregates is defined as 4.75mm or smaller. That is, aggregates which can be passed through a number 4 sieve, with a mesh size of 4.75mm. Fine aggregates include things such as sand, silt and clay. Crushed stone and crushed gravel might also fall under this category.
How is the specific gravity of fine aggregate determined?
The fine aggregate specific gravity test (Figure 1) is used to calculate the specific gravity of a fine 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 coarse aggregate specific gravity test.
Which is the correct definition of apparent specific gravity?
Apparent Specific Gravity:The ratio of the weight in air of a unit volume of the impermeable portion of aggregate (does not include the permeable pores in aggregate) to the weight in air of an equal volume of gas-free distilled water at the stated temperature.
How is the specific gravity of water determined?
Therefore, by definition, water at a temperature of 73.4°F (23°C) has a specific gravity of 1. Absorption, which is also determined by the same test procefure, is a measure of the amount of water that an aggregate can absorb into its pore structure.
How big is the specific gravity of Sands?
The specific gravity of sands is considered to be around 2.65. Apparatus for Specific Gravity Test. A balance of capacity not less than 3kg ,readable and accurate to 0.5 gm and of such a type as to permit the weighing of the vessel containing the aggregate and water .