Asphalt used in the construction of highways and pavements can be preserved through both routine and preventative maintenance. Which type of treatment is applied will vary, taking into account the condition of the surface, its functional requirements, and budget considerations.
Routine maintenance is used to repair localised surface deformations such as cracks and potholes, usually as and when they occur. Generally, the overall surface of the road is in good condition and treatments are used to prevent deformations from getting worse and needing more extensive repairs such as total resurfacing, which can be costly and time-consuming.
When cracks form in a road or pavement surface, water gets in which can weaken it and lead to potholes. As potholes can be the cause of expensive damage to vehicles and make roads unsafe, it is important to fix cracks before they get any worse. The process of crack sealing involves filling cracks in with sealant. This not only seals up the crack but prevents any further ingress of water which might eventually lead to the formation of potholes.
Patching is most commonly used to fill in potholes and prevent further damage while improving safety for road users.
Preventative maintenance techniques are used to preserve the entire asphalt surface as opposed to sections that are already damaged. These treatments can be used to seal the surface and enhance properties such as skid resistance. The main aim of preventative maintenance is to increase the lifespan of the asphalt by slowing down the rate of deterioration. This is one of the most cost-effective forms of asphalt preservation and maintenance, as opposed to fixing deformations when they occur.
Surface dressing techniques are used to restore a road surface and seal it. They can be used to improve the skid resistance of a surface, waterproof it and protect against frost and water damage. Surface dressings involve spraying the road with a bitumen binder, followed by a layer of chippings that are then pressed into the surface using a rolling machine.
Our proprietary CAUTS range provides increased waterproofing and durability against surface damage.
Microasphalt is laid over the top of an existing asphalt surface to seal and protect it. Made up of a mixture of aggregates and bitumen emulsions, micro asphalt can be quickly applied to any road surface to provide enhanced waterproofing and durability.