Are you wondering how to fix a crumbling concrete driveway? Here is some information that may help you decide.
If your concrete driveway is starting to crumble and has small pits which collect water the chances are that the mixture used to create the concrete contained too much water. Professionals
describe this condition as “Spalling”.
How do you fix “Spalling” concrete?
Spalling is not really a condition which lends itself to D.I.Y repairs. However, if damage is not too serious it may well be that you can handle the repair yourself. You’ll end up with a good enough result but it will probably lack the appearance that a professional would produce. If your driveway has been seriously affected by spalling, which has caused full depth cracks, it may be wise to appoint a professional to carry out the necessary repairs. Regardless, it’s your drive so ultimately it’s for you to decide.
The D.I.Y. approach
If you do decide to undertake the work yourself this is what you must do. Temperature is most important and you must ensure air temperatures remain above 10 centigrade or 50 Fahrenheit for at least eight hours after the concrete has been poured. After that the temperature should remain above 0 centigrade or 32 Fahrenheit for the following 24 hours.
1. You’ll need a stiff yard broom and a pressure washer able to produce 100 bar or about 1500 psi. Start by brushing the concrete surface so as to remove all dirt and debris. All weeds must be effectively removed from both cracks in the concrete and along the edges.
2. Pressure washing is next when you should remove as much ingrained dirt and debris as possible. Do not work randomly over the area. Instead work only in one direction to ensure the area will be as clean as possible.
3. Mask any area you do not want the new concrete to touch. An example could be a drain cover or similar. If you are repairing concrete indoors it’s good policy to tape off the bottom metre (3 feet) of your walls.
4. Next you have to mix your concrete. Don´t mix more than you can use in about half an hour. For most people this is about a 40 pound bag (just under 20 kg) which will cover about 35 square feet (just under 4 sq mtrs). Mix the concrete powder in either a cement mixer or a wheelbarrow, adding water until a consistency similar to peanut butter is achieved.
5. Spread a layer of bonding agent next and then trowel the concrete over the selected surface ensuring it is evenly applied. Use the trowel’s edge to smooth the surface – a difficult task without considerable experience.
6. Add a second coat of concrete before the first one has dried. This should be a much wetter mix, similar to a pancake mixture. The second coat is for cosmetic reasons and provides a more finished look.
7. And finally, using a concrete smoothing broom, drag the second mixture across the entire concrete surface. If necessary, spray on more water.
How to fix a crumbling concrete driveway with resin
Resin can also be used in the repair of crumbling concrete driveways. If this type of repair interests you, the acknowledged experts in the UK are Home Logic Driveways. Naturally if you have a resin driveway installed the question of how to fix a crumbling concrete driveway never arises!