Today at Greengates Builders Merchants Accrington, Lancashire we will be looking at how to repair cracked concrete paths and the various materials that are needed to get the job done.
During the winter months of 2009 we saw lots of ice, frost and variations in temeperature and all these cause contraction and expansion which cause damage to concrete, creating cracks and gaps. Now that we are in the spring months the temperatures are higher and the weather is better and this is the perfect time to repair any damage which has been caused to our concrete paths.
What you will need to get the job done:
1. A chisel
3. Wire brush
4. Bonding adhesive
5. Castle Quickcem Cement
7. Sharp sand
The cement used for this repair is a rapid setting cement which is beneficial when there is a need to restore site services quickly. Quickcem castle cement is what is recommended to carryout this job. Castle Quickcem is a Portland cement containing calcium sulfo-aluminate, specially developed to give quick setting and hardening characteristics.
The typical repair method is as follows:
- Chisel out the crack to create a backward-angled cut, using a grinder or cold chisel and a hammer. It is important to clean all dust, dirt and loose materials from the area using a wire brush, or an electric drill with a wire wheel attachment.
- Apply a thin layer of bonding adhesive to the entire repair area using a paint brush. The bonding adhesive helps keep the repair material from loosening or popping out of the crack.
- For repairing a narrow crack, typically prepare a 1:3 (cement: sharp sand by volume) mix, then trowel it into the crack.
- For a wider gap, prepare a 1:2:4 (cement: sharp sand: chippings by volume mix) and apply.
- A useful guide is to use a maximum aggregate size of one third the crack width.
- Smooth the surface of the repair and attempt to match the surrounding surface texture.
Contact Greengates Builders Merchants Accrington, Lancashire NOW to get the items you need to get the job done!