Concrete, Green

Definition

Green concrete is concrete that has set but has not appreciably cured or hardened.

Purpose

The purpose of identifying green concrete is to recognize the stage in the curing process where the concrete is still vulnerable to damage and requires careful handling and controlled curing conditions to achieve its full strength and durability.

Examples of Use

• In construction, green concrete requires protection from premature drying, freezing, or excessive loads.
• Green concrete in formwork needs to be supported until it reaches sufficient strength to be self-supporting.
• Early finishing operations, such as troweling or joint cutting, must be timed based on the concrete's green state.

Related Terms

• Curing: The process of maintaining adequate moisture and temperature conditions to achieve desired concrete properties.
• Initial Set: The stage when concrete begins to harden but is not yet fully cured.
• Final Set: The stage when concrete has hardened sufficiently to be self-supporting.

Notes

Proper curing techniques, such as covering with wet burlap or using curing compounds, are essential during the green concrete stage to prevent defects and ensure optimal strength development.