Paving

Sealcoating Asphalt Pavement

Sealcoating gives asphalt pavement a dark, brand-new appearance, and offers protection against chemicals, water penetrations, UV rays, and automobile fluids. It is also a great way to slow down the oxidation of asphalt pavement.

Sealcoating

Almost all commercial properties use asphalt emulsion sealcoat for its durability and affordability. However, there are different methods of applying this material. Visit Website to learn more.

The primary purpose of sealcoating is to protect asphalt pavements from damage by oil and chemical substances. It can also help prevent cracking and improve the flexibility of the paved surface so that it resists pressure from vehicles. This can prevent the need for costly full pavement replacement and save money in the long run.

Before the application of a sealcoat, the blacktop surface must be thoroughly cleaned. This involves removing any debris, power washing, and treating oil stains. This prep work can be time-consuming and labor-intensive, adding to the cost of the job. It is also important that the proper ratio of water, sand/aggregate and additives is used for the specific job. The mix design should be consistent with recommendations from the manufacturer and project engineer.

During this time, it is also recommended that any potholes be repaired. Filling in these areas will make the parking lot safer for both pedestrians and vehicles, and it will also prolong the life of the new sealcoat.

It is crucial that the right weather conditions are chosen for the sealcoat application. This includes choosing days that are free from rain or wind. Any precipitation during the process can damage the coating before it has a chance to dry. Also, high humidity can affect the drying time and cause scuffing of the finished product.

Before the actual application of the sealcoat, the pavement should be staked and marked off with barricades or cones to keep pedestrians and vehicle traffic away from the area. It is also necessary to clear the area of any landscaping and bushes. The edges of the driveway will be trimmed to ensure a clean, finished look.

After the prep work is complete, the asphalt surface will be swept and blown clean with blowers or brooms. Linear cracks will be blown out with hot rubberized crack filler to prepare them for the sealcoat. A professional pavement contractor will use a high-quality spray application and trim with brushes to reduce the possibility of overspray on walkways or curbs. Once the job is complete, it will be swept again and caution tape removed.

Application

Sealcoating is a process of applying a new layer of asphalt to the existing surface. This new coating fills in cracks and holes, makes the pavement look like it did when it was new, and also protects it from water, oil and other oxidizing substances that degrade the original asphalt. A well-maintained asphalt surface that is regularly seal coated can last up to 30 years before requiring a full replacement.

The first step in the sealcoating process is to assess the driveway or parking lot and look for any cracks, potholes and signs of deterioration that require immediate repair. Then, workers must thoroughly clean the pavement surface to remove any visible dirt, debris or oil stains.

Next, the sealer is mixed to achieve a uniform consistency before being applied to the surface. This is typically done by hand, but mechanical mixers are available that will reduce the application time and help achieve an even coat. It is important to note that sealers can be dangerous, so workers should wear gloves, long-sleeved clothing and masks to avoid skin contact and vapor inhalation.

When the sealer is applied, it is usually brushed in a layer that is roughly one-half inch thick. The brooming action helps to ensure that the sealer is distributed evenly across the surface and into any cracks or holes. After the sealer has been applied, workers must allow it to dry completely before any traffic is allowed on the surface. This usually takes a few hours, but can be accelerated with the use of fast-drying sealants.

In summary, the primary ingredients in a sealcoat are water and refined coal tar. The water satisfies the “water demand” of the fillers and aggregate such as sand, while the coal tar satisfies the binder needs of the mix. Additives may be added to the mixture for a variety of reasons, including drying speed, altering sand suspension, increasing water repellency or adding resistance to salts and petrochemicals. This is a complex mix, and it is important to use the best possible products for the most beneficial results.

Curing

Sealcoating is an excellent way to protect a paved surface, and it also saves money over the long-term as it prevents the need for full pavement replacement. However, to get the best results from this process, it is important that it is done correctly by a professional. This is because amateurs are likely to make mistakes that could damage the surface and lead to premature wear, requiring costly repairs down the line.

Proper curing is crucial for a successful project. In general, it should take at least 48 hours for the sealcoat to fully cure and harden. This is to ensure that the sealant bonds well with the pavement, maximizing durability and protection. Proper conditions for curing include warm, dry weather with low humidity. High humidity levels can increase drying time and cause the coating to not adhere to the pavement. In addition, it is important that the coating be kept free from traffic until it is fully cured.

To ensure the sealcoating is curing properly, a contractor should monitor the weather conditions closely and wait for good conditions to apply the second coat. If there is a risk of rain, the project should be delayed until the storm passes. A contractor should also keep an eye on the amount of sunlight that is available. Direct sunlight can speed up drying and curing, while shade or overcast skies can slow it down.

The liquid sealant that is applied to the pavement contains a great deal of water. It is necessary that this moisture escapes from the surface so that the sealcoat can dry and form a protective shell. On a comfortable day with 40 percent humidity, the sealant may dry at a normal rate. When the humidity rises to 80 percent, this will greatly increase the amount of time that it takes for the sealant to dry completely.

To determine whether the sealant is cured enough, a contractor can use a variety of tests. A visual test is performed by observing the color of the coating. A dull color indicates that the coating is still wet and needs to continue drying. A tactile test can be performed by applying pressure to the sealant with a thumb. If there is no pick-up of the sealant from the thumb, it is cured sufficiently to continue using the surface.

Maintenance

When done correctly, sealcoating prevents oxidation, stops weather damage and beautifies pavement. This is a low-cost maintenance activity that can greatly extend the life of your blacktop and provide a fresh, new look to your commercial property.

Asphalt sealcoating is a coal tar emulsion that is spread over an existing asphalt surface to protect the underlying material from sun and water damage. The process also fills in small cracks and fissures to make the surface smoother. While the resulting material is not as thick as original asphalt, it is strong enough to support vehicle traffic and resist further wear.

Typically, you want to sealcoat your parking lot or driveway every other year. However, you can choose to have it done more often if there is a specific need. For example, if your lot or driveway is heavily used, it may need to be sealcoated more frequently than a low-traffic area.

Before any work can begin, the pavement must be clean and free of dirt, debris and stains. This can be accomplished by using blowers and rotary brooms. Linear cracks will be filled with a hot rubberized crack filler. Once the surface is ready to be sealcoated, workers will block off the area to be worked on with cones and barricades. Sprinklers should be turned off so the pavement does not get wet during or after the process.

The entire process usually takes about two days from start to finish, and you must wait 24 hours before you can drive on the newly sealed surface. It is a good idea to avoid heavy machinery or equipment in the area during this time as it can cause indentation or damage the new sealcoat.

There are a few telltale signs that it is time to sealcoat your commercial property. For instance, if you notice the surface color changing from its original deep black to gray, this is a sign that your pavement is starting to deteriorate. Also, small cracks that are left unattended will quickly become larger and allow rain or water to seep into the underlying asphalt, further damaging it.