Selecting the Right Aggregate for Concrete Construction

When constructing concrete, it is essential to select good quality aggregate that is clean, hard, strong, and free of absorbed harmful chemicals, clay coatings, or other contaminants. Coarse-grained aggregates with a size of 20 mm or less are typically used for most concrete constructions. The ideal construction aggregate should have a rough surface texture and be free of coating and other dirt particles. Observations and field tests can be used to check the quality of aggregates and choose the right aggregate to produce concrete.

Leveling limits and maximum aggregate size are specified because these properties affect the amount of aggregate used, as well as cement and water requirements, workability, pumpability, and concrete durability. Recycled concrete is a viable source of aggregate and has been successfully used in granular subbases, soil cement and new concrete. When specifying void graded aggregates, certain particle sizes are omitted from the aggregate of the size continuum. Aggregates greatly influence freshly mixed and hardened concrete properties, mix ratios and economy.

The texture of the surface, the shape of the particles and the cleanliness of the coarse-grained aggregate can be roughly checked only by visual observation. To ensure that your concrete construction project meets desired strength and durability requirements, it is important to select good quality aggregate that is clean, hard, strong, and free of contaminants. It is also important to consider the size of the aggregate, as well as its texture, shape, and cleanliness. By following these guidelines, you can ensure that your project will be successful.

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