Water Wash

Chemical retarding agents are used to slow down the setting time of the concrete surface. These agents can be applied to either the casting bed face or the exposed concrete surface using spray equipment.

The retarding agents are carefully applied to the designated areas where the water-washed finish is desired. This can be done during the concrete panel casting process or after the panels have been lifted, depending on the project’s requirements and logistics.

The retarding agents extend the setting time of the concrete, allowing for easier removal of the top layer to expose the aggregate underneath.

After the concrete has set to the desired level, the panels are lifted from the casting beds. Then, a pressure washer is used to remove the top layer of concrete, exposing the underlying aggregate. The water pressure, along with the action of the pressure washer, effectively removes the surface layer while leaving the aggregate intact.

The texture and appearance of the water-washed finish depend on the type and size of the concrete aggregate specified. Different aggregates can create varying visual and textural effects. The choice of aggregate should align with the desired aesthetic for the project.

The depth to which the concrete surface is removed during the pressure washing process determines the final texture and appearance of the finish. The depth of exposure is a critical factor in achieving the desired visual effect.