Typical thickness acceptable for many contractors is between ¼ and 2 inches thick. Technically, concrete overlays can be as thin or as thick as desired. However, the best thickness to work with may depend on the type of overlap you choose to work with. They can vary significantly in drying time, bond properties, and abrasion resistance, making them suitable for some projects and impractical for others.
Later, learn more about these and other critical features of the best concrete grinder. Since you are applying a concrete grinder to an existing surface, the product must adhere well to that surface to ensure that it does not peel off, requiring additional repairs. Most concrete grinders adhere very well to concrete. Some products are more versatile than others and also adhere to other surfaces, such as brick, stucco, metal, masonry, and even wood.
Bonding properties are also important when repairing a subfloor to ensure that the new floor installed over the coating adheres. Since most concrete surfaces are outdoors, it is essential to understand the temperatures that concrete can tolerate during installation. Most concrete repavers require the temperature to be above 50 degrees Fahrenheit during the installation process and for 24 hours thereafter to ensure that it dries properly. Concrete that serves as a driveway and needs to withstand the weight and friction of automobiles must have greater abrasion resistance than a walkway that only sees foot traffic.
Concrete driveways must be able to withstand at least 4,000 pounds per square inch (psi) once fully cured to support the weight of an automobile. 2,500 psi pressure is suitable for walkways. In some cases, a primer is required to help bond the old concrete to the new one. Most concrete repavers include adhesive agents that eliminate the need for a primer.
For those who don't, preparing the surface is crucial to prevent the two surfaces from separating, which requires further repairs. The primer generally consists of one part water and seven parts cement, which is applied as an intermediate layer between old and new concrete. Apply the primer coat and then immediately add the repaver to ensure good adhesion between the primer and the new concrete. When choosing a concrete grinder, make sure that the drying time fits the project.
Concrete with fast dry times that allow the paved area to be put back into service sooner may be convenient, but require the user to work faster before the concrete is too difficult to spread. Concrete grinder replaces concrete that has worn off the surface. The more concrete wears out, the more product it will need to fill in the missing parts. While a thinner product may be suitable for moderately worn concrete, a repaver with a thicker consistency is required to replace more material.
Thicker products can better fill cracks and crevices up to ½ inch deep. However, thinner products have self-leveling characteristics that make it easy to apply. Different manufacturers use different ingredients that affect the consistency of their specific rejuvenators. Depending on the amount of surface you need to replace, consider whether a thick or thin product is needed.
The consistency of some rejuvenators can also be altered depending on the amount of water added to them. This versatility allows you to mix a thicker batch for patching large chips and a thinner batch for coating large areas. Most concrete repavers are applied by mixing the product with water (if necessary) and then pouring it over existing concrete and spreading it with a spatula. Before applying the repaver, clean the surface thoroughly to promote good adhesion between old and new concrete.
Repair any large splinters greater than -inch deep or wide by mixing a batch of polisher to a thicker consistency. One of the trickiest parts of repaving a concrete floor is properly leveling the new concrete. The Quikrete repaver is ideal for covering concrete damaged by cracks and chips with its finer consistency and self-leveling ability. Simply mix the concrete with water, pour evenly over the old concrete, spread it with a spatula if necessary and marvel that it self-levels to a smoother surface.
Fast-setting formula hardens enough for foot traffic in just 6 hours. This is an excellent option for preparing a surface for laying tiles or other types of floors. Quikrete comes dry in a 50-pound bag, which provides enough coverage for 35 square feet with an inch thickness. Mix this product with a thick or fine consistency to suit different applications and observe how it adheres to materials ranging from bricks and stones to wooden underlayment.
It also sets faster than most cement and hardens to structural strength in just 1 hour. Rapid Set comes in a 55-pound bag, enough to cover half a cubic foot of space. A slate gray color restores stained concrete to a uniform finish, while its textured non-slip surface makes this repaver safe for walkways, patios, and basement floors, as well as wood. Hardens quickly, dries in 4 to 6 hours for a second coat and dries completely after 3 days.
However, this product is not hard enough for use on driveways and other drivable surfaces. The superior bonding qualities of this cement make it suitable for installation on various types of materials, such as wood, masonry, terrazzo, ceramics and tiles, without priming the surface first. It's also strong enough to line a driveway or repair cracks and chips in a concrete patio. To use, mix with water, pour over the surface and spread with a trowel.
Ardex comes in a 10-pound bag, which covers up to 300 square feet and dries in just 3 hours. Repaving small jobs doesn't have to involve carrying 50-pound bags and the messy process of mixing concrete. This lightweight 16-ounce bottle will do. Bluestar Concrete Resurfacer is ready-mix concrete.
Simply shake the bottle, cut off the tip of the applicator, squeeze to fill in cracks and chips, then level with a spatula. This product can fill areas up to ½ inch deep. Once the repair is complete, the tip can be resealed, preserving excess cement for later repair. This easy-to-use repaver is ideal for small repair projects in patios, driveways and walkways when large batches of cement are not required.
Premixed repavers do not require the messy mixing process of dry cement mixes. While not practical for larger applications that require a lot of cement, they are a good option for small jobs. This Henry ready-mix floor patch is ideal for coating small portions of a chipped and cracked concrete floor or repairing an aged subfloor for new floor installation. The consistency makes it easy to apply concrete smoothly while achieving a level finish with existing concrete.
The floor patch comes in a 1 gallon tub, which covers 20 square feet and dries in 2 hours. The tub can be reclosed, preserving leftovers for other projects. If you're still wondering how to install old concrete over new concrete or which grinder is right for your project, read on for answers to these and other frequently asked questions. Many concrete repavers can be used to line concrete driveways.
However, asphalt roadways require an asphalt roadway repaver. While concrete is incredibly durable, it is also prone to wear and tear, which will manifest itself in the form of cracks, chips, and even stains over time. On the contrary, if all repairs and corrective problems in the substrate are properly addressed, the concrete layer will not experience cracks for many years. A concrete coating professional will also advise you on the best coating mix products based on the condition of your floor and the aesthetic result you expect.
However, given the process involved and the technical aspects of surface conditions and choosing the right concrete layer to get the best result, it makes more sense to have a professional do the project for you. Abrasion resistance is the concrete grinder's ability to resist chafing wear and friction from feet and tires. For cracks and sunken slabs, your concrete technician will employ a repair technique known as mud lift to level the surface. This involves pumping concrete into the cracks and under those sunken areas of a slab to level the surface.
Smooth gray concrete is functional, but may not have the best finish for your home, office, or commercial establishment. Be sure to use a concrete grinder, which includes adhesive agents that allow the new surface to adhere to the old one. . .