Question 1

How to clean a concrete driveway?

Accepted Answer

To clean a concrete driveway, start by sweeping away any loose dirt or debris. Apply a mixture of dish soap and water or a commercial concrete cleaner to the surface, and scrub with a stiff-bristle brush. For stubborn stains, a solution of 1 part bleach to 3 parts water can be used, ensuring the area is well-ventilated. Rinse thoroughly with a hose or pressure washer on a low setting. Regular cleaning prevents buildup and maintains the driveway’s appearance.

Question 2

What type of concrete mix is best?

Accepted Answer

The best concrete mix for driveways is a minimum of 32 MPa (megapascals) compressive strength concrete with air entrainment to improve freeze-thaw durability. Consider adding fibre reinforcement or wire mesh to enhance strength and crack resistance. The specific conditions and expected load on your driveway will dictate the ideal mix, so consulting with a professional is recommended.

Question 3

What causes concrete driveways to crack?

Accepted Answer

Concrete can crack for multiple reasons, including:

Subgrade Settlement: If the ground beneath the concrete isn’t compacted properly, it can settle and cause cracks.
Tree Roots: Growing tree roots can exert pressure and cause cracking.
Poor Construction: Inadequate concrete mix, improper curing, or lack of control joints can lead to cracks.
Freeze-Thaw Cycles: Water in the concrete can freeze and expand, causing cracks. Air-entrained concrete helps mitigate this.
Heavy Loads: Excessive weight from vehicles or equipment can exceed the concrete’s load-bearing capacity.

Question 4

Best way to maintain concrete driveways?

Accepted Answer

Simple ways to maintain your concrete driveway:

Regular cleaning to remove dirt and stains.
Sealing the concrete every 2-3 years to protect against moisture and wear.
Avoiding the use of deicing chemicals in winter, as they can damage the surface.
Repairing cracks promptly to prevent water infiltration and further damage.
Ensuring proper drainage to avoid water pooling on the surface.

Question 5

Should you re-seal concrete driveways?

Accepted Answer

It’s important to be re-sealing your concrete driveway every 2-3 years is recommended to protect against moisture penetration, stains, and wear. Sealing extends the life of your driveway by forming a protective barrier against the elements and everyday use. Choose a sealer appropriate for your climate and the specific type of concrete.

Question 6

How long before I can drive on new laid concrete?

Accepted Answer

It is typically advised to wait at least 7 days before driving on newly laid concrete. This allows the concrete to achieve sufficient strength to bear vehicle loads. However, curing times can vary based on weather conditions, concrete mix, and thickness of the pour. Follow the recommendations of your concrete professional for the best results.

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