Dry Pack

Definition

Concrete or mortar mixtures deposited and consolidated by dry packing. It is a low-slump grout tamped into the space in a connection between pre-cast concrete members or between a steel column and the column base plate.

Purpose

Dry pack is used to fill gaps and create a strong bond between pre-cast concrete members or between structural steel components. It ensures a solid, load-bearing connection and prevents movement or shifting of the connected elements.

Examples of Use

1. Pre-cast Concrete Assembly: Filling the joints between pre-cast concrete panels to create a seamless, solid structure.
2. Steel Column Installation: Tamping dry pack grout into the space between a steel column and its base plate to ensure stability.
3. Repair Work: Used in the repair of concrete structures where conventional concrete placement is challenging.

Related Terms

• Grout: A mixture used to fill gaps and reinforce structures, often with a flowable consistency.
• Mortar: A mix of cement, sand, and water used in masonry work.
• Slump: A measure of the consistency and workability of concrete.

Notes

• Proper consolidation of dry pack is essential to ensure its effectiveness and structural integrity.
• It is often used in situations where formwork is impractical or where precise control over the material placement is needed.