What do you mean by grading of aggregate?

What do you mean by grading of aggregate?

Grading of aggregates is determining the average grain size of the aggregates before they are used in construction. This is applied to both coarse and fine aggregates. The aggregate sample is sieved through a set of sieves and weights retained on each sieve in percentage terms are summed up.

What is the gradation of aggregate?

Definition. The particle size distribution of an aggregate as determined by sieve analysis is termed as gradation of aggregates. If all the particles of an aggregate are of uniform size, the compacted mass will contain more voids whereas aggregate comprising particles of various sizes will give a mass with lesser voids ...

Why is grading of aggregates important?

The grading or size distribution of aggregate is an important characteristic because it determines the paste requirement for workable concrete. ... The more these voids are filled, the less workable the concrete becomes, therefore, a compromise between workability and economy is necessary.

What is grading of coarse aggregate?

Coarse aggregates used in concrete making contain aggregates of various sizes. This particle size distribution of the coarse aggregates is termed as “Gradation”. The sieve analysis is conducted to determine this particle size distribution. ... It is this matrix that is vulnerable to all ills of concrete.

What are the types of fine aggregate?

Types of Fine Aggregate

• Coral Sand.
• Glass Sand.
• Immature Sand.
• Gypsum Sand.
• Ooid Sand.
• Silica Sand.
• Pit Sand.
• River Sand.