What is the size range of coarse aggregate typically used in concrete mixtures?

Coarse aggregate is an essential component in concrete mixtures, contributing to the strength and durability of the final product. The size range for coarse aggregate typically falls between 3/8 inch to 1 1/2 inches. This range is commonly specified to balance workability, strength, and the amount of cement paste needed for the mixture.

Aggregates within this size range provide adequate interlocking for structural integrity and improve the concrete's overall mechanical properties. Larger aggregates may lead to difficulties with workability and can affect the finish of the concrete surface. The specified range ensures that the aggregates can effectively bond with the cement paste while maintaining a good flow in the mixing process.

The other size ranges mentioned do not align with typical requirements for concrete aggregate. For instance, smaller sizes may be considered fine aggregate, while those exceeding the 1 1/2 inches could result in practical challenges during the mixing and placement phases of concrete production. Thus, the range from 3/8 inch to 1 1/2 inches is widely accepted in the field for ensuring optimal performance in concrete applications.