Asphalt paving: technology, advancements, and advantages

Asphalt paving projects are an essential part of highway maintenance and are crucial to keeping the infrastructure running smoothly.

The process involves a considerable amount of planning and design, with issues related to the environment, traffic, land properties, utility works, nearby residents, and maintenance costs, all important considerations for new highway projects.

For ongoing maintenance projects, existing road conditions should also be assessed, as there can be major repercussions if work is done incorrectly, including starting the entire job over again, which can double the costs of a project.

Once the initial planning and design work has been done, excavation machinery and crawler bulldozers are used to move and assemble a variety of materials throughout the project to shape it. Once completed, the area must be leveled to ensure an even base.

As an industry that remains traditional in its methods, this involves a combination of labor and machinery, such as a paver, which is crucial in the road building process as it not only lays the asphalt but also the large masonry base. . It is then compacted to allow the placement of the hot asphalt sub-base, the base, the binder and finally the surface layer on which it is applied.

The asphalt is then dumped into the paver for the hot paving process to begin. Traditionally, to do this, one operator drives the paver while two screed operators follow at the rear of the machine on either side, dipping a metal rod into the asphalt, and checking the depth with a straight edge to ensure it is being placed. the correct thickness, otherwise the asphalt levels are adjusted.

Typically, two other workers are also on-site, to drive the railcars to and from the paver, and to excavate the asphalt that has been placed over the manhole cover plates once the paver has passed through. on top of these as they need to be exposed.

Challenges when asphalt paving

The paving process is not without its challenges. Hot mix asphalt, which is usually a bituminous compound, must not only be placed at the correct height but must also have the correct mix of compounds.

Since the material must be at the right temperature, it must also arrive on time, as delays can cause the material to cool down during transportation. If it’s too cold, the shoe polish isn’t as malleable as it should be and starts to harden, meaning it doesn’t stick properly when applied.

This is called thermal segregation, and it can cause water to seep into the road surface, freeze, and then crack to create potholes, which are then made worse when cars drive over them. To prevent this, the paving material must be laid at the correct temperature and the correct level.

Compacting the asphalt on the road once the material has been laid is also an important part of the process, as the material needs to be rolled at the correct temperature. To ensure the right temperature, the compaction systems have a built-in temperature sensor. However, if the paver ahead is paving too fast, by the time the roller with the compaction system reaches the material, it will not be able to adhere properly.

That said, if the material is rolled at too high a temperature, this also negatively impacts compaction as the stones in the material are pushed below the surface, leading to less texture and slip resistance. It is critical that the rolling temperature is correct and that the paver and roller work together to prevent future failures on the road.

Pavement Accuracy Test

Once the pavement is placed, tests must be carried out to verify the precision of the project. The rolling rule test, for example, which consists of a fixed distance rule mounted on several wheels with a sensor in the center, is used to measure road deflections.

Before the paving is laid, accuracy requirements will be established, generally specifying that over a 3m length, inaccuracies cannot exceed 6mm. If the pavement contains a depression or peak in the material that has been placed, the rolling rule test equipment will notify the operator.

Errors detected by the rolling screed test can be one of the leading causes of paving job failures and must be corrected so that drivers do not feel a bump in the road on their travels.

To try to eliminate the risk of these bumps, paver operators can use 2D paving systems. This paving system would provide accurate grade and elevation information to the screw operator through a high-contract control box, ensuring operators have all the information needed to ensure accurate grade and material thickness.

Benefits of Paving Innovations

The paving industry remains traditional in its methods and increasing the adoption of on-site innovations remains a challenge. However, when adopted, the technology can provide operators and paving contractors in Houston with a long-term assurance of the accuracy of their work and can offer protection if roads are damaged in the future.

This is because, when roads break down, if operators have the paving and rolling data from their machines to confirm the accuracy of their project, they can prove that they are not responsible for any road failure in the future and avoid pay ends or complete any rework.

The future of paving

The future of paving lies in the adoption of technology. Recognizing the benefits of innovation, there is now a tremendous opportunity for the industry to transform paving workflows and increase project productivity and accuracy by investing in the latest road resurfacing solutions.

One such solution that is helping to maximize productivity and increase accuracy in paving projects is SmoothRide technology which would save time and reduce project costs.

Starting with the design stage of the process, the solution uses an RD-M1 scanner, which is placed on a vehicle and driven across the existing surface at approximately 55 mph, to collect data on the millions of points on the surface and provide complete information and accurate scanning of the area.

Using the software, operators can then find imperfections in the data collected by the scan, such as depressions in the road where trucks are, and use this information to design changes that need to be made. These can range from different curvatures, slopes, and angles to identifying where water runs off a surface. Once these changes have been identified, they can be fed directly into the planer, which can then be milled and planned to the exact level and time required.

Without this technology, the entire surface would be planned and basic equipment such as a nest wheel would be used to take measurements before the various levels required for the road are sprayed onto the surface to notify the paver.

Not only is this time-consuming, but it is also less accurate and efficient, as the operator doing the paving would have to keep adjusting levels for different heights of material.

Materials can also be compacted differently, which can cause problems as different levels of material are placed. With Smooth Ride, however, the planer changes all levels using data, automatically adjusting to different heights so that the pavers can simply lay a set amount of material across the width and distance without taking any measurements.

In addition to saving time, this would ensure that operators know in advance how much material is needed for a project, reducing waste and costs, and minimizing the likelihood of rework.

For projects such as airport runways or highways, where time is at a premium and resurfacing needs to be done as quickly as possible, investing in this technology can also have significant financial benefits, as paving can be done at driving speed, eliminating the need for expensive roads.

Technology has improved many aspects of asphalt paving

Asphalt paving has improved in the following ways:

Quality Control. With modern machines and techniques, asphalt plants can achieve high-quality results with a low number of batches per day. This means that even small plants will produce high-quality asphalt at affordable prices.

Paving Removal and Tear Off Machines. Asphalt plants use these types of machines to remove damaged or insufficiently cured materials from their process so they don’t have to waste time trying to patch them up later on (which costs more money). They also allow for more accurate placement of overlays underneath so that you don’t have any trouble driving over them later on either!

Costs Savings On Your Project! You Can Save Money When Hiring Our Professionals For Asphalt Plant Maintenance And Repair Services In the Houston Area Since We Are Certified in all types of equipment used by professional contractors in the paving Industry.

Do you want to learn more about how paving contractors in Houston can assist you? Pavement Services provides excellent asphalt paving services in Houston TX. Get a free paving estimate from us today!