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The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can result in enhanced concrete strength. However, too-large aggregates may weaken concrete by reducing the aggregate-cement bond area and introducing discontinuities, leading to a heterogeneous mix. The optimal maximum size of aggregate depends on the specific application, but for most structural concrete, it is typically limited to either 25 mm or 40 mm. The size is constrained by the dimension of the concrete member, the space between reinforcing bars in the member, and a balance between the cost of managing various aggregate sizes and the risk of segregation during placement.

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5.6 : Maximum Size of Aggregate

Aggregates and Water

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5.1 : Unsoundness of Aggregate due to Volume Change

Aggregates and Water

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5.2 : Deleterious Substances in Aggregate

Aggregates and Water

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5.3 : Sieve Analysis and Grading Curves

Aggregates and Water

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5.4 : Fineness Modulus

Aggregates and Water

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5.5 : Types of Aggregate Grading

Aggregates and Water

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5.7 : Quality of Water

Aggregates and Water

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5.8 : Testing Water Quality

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5.9 : Aggregates Classification

Aggregates and Water

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5.10 : Shape and Texture of Coarse Aggregate

Aggregates and Water

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5.11 : Bonding and Strength of Aggregate

Aggregates and Water

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5.12 : Toughness and Hardness of Aggregate

Aggregates and Water

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5.13 : Specific Gravity of Aggregate

Aggregates and Water

158 Vistas

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5.14 : Bulk Density of Aggregate

Aggregates and Water

349 Vistas

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5.15 : Porosity and Absorption of Aggregate

Aggregates and Water

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