There are several different types of road surface treatments available. These include HMA overlays, Diamond grinding, High volume cape seals, and Slurry seals. These methods vary in cost and duration, but they all produce the same result. For high-traffic volume applications, polymer-modified emulsions are an excellent choice. However, preparations must be completed in advance. If you are looking to get road work done contact your local tarmac surfacing contractors.
Road surface treatment is a broad term that refers to the surface of a road, lane or parking lot treatment. There are many different types of road surface treatments, each with their own benefits and disadvantages. Road surface treatment can also be referred to as “coating”, “treatment layer” or “surface layer” in some cases, but regardless of what you call it the goal remains the same; create a safer and visually appealing road surface while reducing maintenance costs, extending the life of your road, and improving its aesthetics. Read on to learn more about the various types of road surface treatments and when they are most beneficial.
High-volume cape seals
High-volume cape seals are an alternative to slurry and chip seals for road surface treatment. However, the process requires special equipment and more construction time, leading to traffic delays. In addition, the life expectancy of cape seals ranges from six to fifteen years, depending on the treatment and conditions. According to a recent Texas Department of Transportation study, chip seal behaviour can significantly influence the performance of cape seals.
The performance life of cape seals is approximately 15 years, which is significantly longer than that of slurry seals or micro surfacing. In addition, recent developments in materials and construction techniques have extended the service life of cape seals.
Diamond grinding
Diamond grinding for road surface treatment involves the removal of rough patches in concrete pavements. This procedure requires several steps and should be considered a last resort. This process is effective when combined with other repairs to create a smoother surface and improve friction. However, its service life depends on several factors, including traffic load, climate and concurrent repair work.
When performed correctly, diamond grinding removes a thin layer of concrete, about 1/4 of an inch, from a pavement’s surface. It also eliminates rough edges and surface irregularities and provides a smoother ride for vehicles. In addition, the process improves the friction of the pavement surface, ensuring that it will remain soft for years to come.
HMA overlays
Using HMA overlays for road surface treatment is an excellent way to improve the safety and durability of a roadway. These thick layers of material are applied over the existing pavement to improve its friction. In addition to enhancing safety and durability, HMA overlays also improve the appearance of the road by sealing and repairing surface deficiencies. They are suitable for both rigid and flexible pavements. In addition, they are relatively cheap and require minimal surface preparation.
The treatment thickness is based on the pavement condition, anticipated traffic, and site factors before it is treated. Generally, a higher ratio of HMA to PCC results in less damage to the pavement. The standard thickness for the treatment is more strict on arterials and interstates than on local and collector roads. Therefore, the treatment is most appropriate for road surfaces with minor to moderate surface distress.
Slurry seals
Slurry seals are one of several methods for enhancing road surface performance. The process’s effectiveness depends on the interaction of the bitumen and polymer with the aggregates. While systems vary, they usually use a polymer with a specific mix ratio. Recommended polymer solids concentrations are 2% to 2.5% of bitumen weight.
Slurry seals are especially useful for roads with a rough surface or older pavement. They help keep water out and prevent oxidation. They also help seal existing cracks. However, they do not add structural value to the road. Because of this, they are best used on roads where vehicles will only travel at a moderate speed and where the pavement is not expected to experience a lot of traffic.
High volume retread
Retread is a cold in-situ road lay specialist surface treatment that is ideal for extending the life of roads. It is a cost-effective and sustainable alternative to traditional construction methods. The process can be carried out in both urban and rural environments. Its advantages include durability, environmental benefits, and safety.
