What is ASTM C127?
ASTM C127 : Standard Test Method for Relative Density (Specific Gravity) and Absorption of Coarse Aggregate.
How do you find the specific gravity of aggregates?
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 ASTM c29?
1.1 This test method covers the determination of bulk density (“unit weight”) of aggregate in a compacted or loose condition, and calculated voids between particles in fine, coarse, or mixed aggregates based on the same determination. This test method is applicable to aggregates not exceeding 125 mm [5 in.]
Is the actual value of the specific gravity of aggregate a measure of its quality?
Specific Gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. It is the measure of strength or quality of the specific material. Aggregates having low specific gravity are generally weaker than those with higher specific gravity values.
What is ASTM 33?
1.1 This specification defines the requirements for grading and quality of fine and coarse aggregate (other than lightweight or heavyweight aggregate) for use in concrete.
How is the abrasive charge selected for Los Angeles abrasion test?
Abrasion test is carried out to test the hardness property of aggregates. The principle of Los Angeles abrasion test is to find the percentage wear due to relative rubbing action between the aggregate and steel balls used as abrasive charge.
What is specific gravity of aggregates?
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.
What is loose unit weight?
loose unit weight of an aggregate is the amount of aggregate that fills a unit volume without any compactive effort applied.
What does a high specific gravity mean in aggregate?
2. Specific gravity of aggregates is considered as an indication of strength. Material having higher Specific Gravity is generally considered as having higher strength. Water absorption of aggregate is a measure of porosity.
What do you mean by bulking of sand?
Bulking in sand Occurs When dry sand interacts with the atmospheric moisture. Presence of moisture content forms a thin layer around sand particles. This results in the increase of the volume of sand. Excessive presence of moisture content in the sand makes concrete to less durable and lose its strength.
IS 383 for coarse aggregate?
1.1 This standard covers the requirements for aggregates, crushed or uncrushed, derived from natural sources, such as river terraces and river- beds, glacial deposits, rocks, boulders and gravels, for use in the Production of concrete for normal structural purposes including mass concrete works.
What does it mean to conform to ASTM d-4236?
Brief Answer ASTM D-4236 is the standard practice of labeling art materials for chronic health hazards. The designation “conforms to ASTM D-4236” means all of the potentially hazardous components of the art product have been clearly labeled on the product packaging.
How is relative density measured in ASTM C127?
Active Standard ASTM C127 | Developed by Subcommittee: C09.20 Book of Standards Volume: 04.02 5.1 Relative density (specific gravity) is the ratio of mass of an aggregate to the mass of a volume of water equal to the volume of the aggregate particles – also referred to as the absolute volume of the aggregate.
What does the ASTM designation number stand for?
An ASTM designation number identifies a unique version of an ASTM standard. 1. Scope 1.1 This practice describes a procedure for developing precautionary labels for art materials and provides hazard and precautionary statements based upon knowledge that exists in the scientific and medical communities.