13 Types of Aggregates – According to Size, Shape, Weight and Geological Origin

13 Types of Aggregates – According to Size, Shape, Weight and Geological Origin

3rd June 2019 0 By Malay Sautya

13 Types of Aggregates

Following 13 types of aggregates are classified according to their size, shape, unit weight and geological origin:

13 Types of Aggregates According to Size, Shape, Weight and Geological Origin

A. According To Geological Origin

According to the geological origin, aggregates are the following two types:

1. Natural Aggregate

  • Example of natural aggregate – Crushed Stone, Gravel etc.

2. Artificial Aggregate

  • Example of artificial aggregate – Broken brick, Blust furnace slag etc. 

B. According To Size

According to size, aggregates are the following 4 types:

1. Fine Aggregate

It is the aggregate most of which passes through 4.75mm I.S sieve.

  • Example of fine aggregate- Natural sand, Crushed stone sand, Crushed gravel sand.

2. Coarse Aggregate

It is the aggregate most of which retained on the 4.75mm I.S sieve.

  • Example of coarse aggregate – Crushed stone or gravel.

3. All-in-aggregate

Combination of coarse & fine aggregates available in nature.

4. Single Size Aggregate

Comprising particles falling within a narrow limit of size.

C. According To Shape

  1. Round Aggregate.
  2. Irregular Aggregate.
  3. Angular Aggregate.
  4. Flaky & Elongated Aggregate.

D. According To Unit Weight

1. Normal-Weight Aggregate

Sp. Gravity 2.5 to 2.7

  • Example of normal-weight aggregate – Sand, Gravels, Crushed rocks etc.

2. Heavy-Weight Aggregate

Sp. Gravity 2.8 to 2.9

  • Example of heavy-weight aggregate – Magnetite(Fe3O4), Barytes(BaSO4).

3. Light-Weight Aggregate

Sp. Gravity 1.0 to 1.2

  • Example of light-weight aggregate – Sintered fly ash aggregate, expanded shale etc.

Read Also:

Functions Of Fine & Coarse Aggregate in Concrete

Requirements or Characteristics Of A Good Fine & Coarse Aggregates

Deleterious Material in Aggregates

Purpose of Different Testing of Aggregates