Perfect combination of old and new cement concrete

The combination of old and new cement concrete is an important link in building construction. This paper will introduce how to combine old and new cement concrete perfectly through a series of steps to create a durable building structure.

clean the surface

First of all, thoroughly clean the hardened concrete surface, remove the cement film and loose stones on the surface, and ensure that the surface is wet without water.

♂? Laying cement mortar

Before preparing to pour new concrete, lay a layer of cement mortar with the same composition as the new concrete at the construction joint.

Vibrating new concrete

Carefully pour and vibrate new concrete to ensure the close combination of new and old concrete.

Construction joint treatment

According to the need, the construction joints can be treated, including cleaning, chiseling, cleaning and other steps, and the water stop can be used for waterproof treatment.

Add fixed mode

If it is necessary to connect new and old concrete in the form of non-construction joints, we can consider adding bolts and other fixing methods.