Asphalt Pavement Maintenance Planning

Are there an asphalt maintenance plan in place on your facility? As asphalt surfaces age, erode and become brittle, proper periodic assessment and coverings are crucial in maintaining a quality surface and infrastructure. The right plan can help to conserve time and cash start by making sure the maintenance applications are matched towards the seriousness of the pavement problems.

Understanding Defects

You can find typically three types of asphalt failures: Surface, Bond, and Structural Failures. For surface failures there can be raveling, and transverse or longitudinal cracking problems. Raveling will be the decrease of aggregate from your surface due to abrading action from wheels. Longitudinal cracks run toward traffic and transverse cracks are 90 degrees to longitudinal cracks. Longitudinal cracks are generally caused from shrinkage.

Bonding failures are typically in the type of slippage between two layers of surfacing causing cracks within the upper layer. Sometimes the combination of bonding and crack failures causes top layer to slough off in chunks.

One of the most severe defects are structural cracking that may include fatigue cracking and rutting. Fatigue cracking is caused by the surface being flexed along from heavy loads going by. The cracks are very close together and appear such as an alligator’s skin. This defect takes place when the underlying road section cannot keep the loads being applied to the pavement. One heavy truck can flex and damage a road more than a large number of cars passing within the same spot. Rutting is often a depression in the pavement in the wheel path and is usually continuous within a pavement. It might occur in exactly the asphalt layer or through the entire infrastructure of asphalt, base, and soil.

Programs

The gap varieties of actions it’s possible to choose will change with all the defects and extent of injury that comes with the pavement surface. The opportunity solutions may include surface seal coats, crack filling, slurry seals, selective dig-outs and patching, or full overlays.

Inside the utilization of surface seal coats, there are many to select from. They include slurry, cape, micro-surfacing, fog, and rubberized chip seals for starters. A fog seal contains no aggregate or sand and it is spray put on keep your surface aggregate set up. A surface seal coat is often a mixture of sand and asphalt emulsion along with other fillers. It possesses a uniform black surface and protects from UV damage and reduces water intrusion. A slurry seal contains emulsified asphalt binder, a graded fine aggregate additive and water and is also used by machines with pressure.

An overlay is used over the top of an existing pavement surface to bolster and protect the main structure. It is usually applied at various thicknesses plus could be rubberized. Sometimes milling is necessary ahead of the overlay when excessive heights are a problem to prevent any potential trip hazards. Also the use of paving grids and fabrics outrageous of an existing cracked pavement offers additional strength and water intrusion protection.

Deciding on a Course of action

Parking lots primarily utilize asphalt seal coats, slurry seals and sand seals. These seals are designed for used in areas that can have constant turning forces. The oils are not as easy than chip and cape seal oils and reduce tire marking about the pavement.

Streets generally utilize slurry, chip, cape seals or micro-surfacing. These treatments vary depending on the conditions with the road. Crack filling and dig-out repairs has to be completed prior to the keeping the counter treatments to discover the maximum performance life.

So you can see there are many failures modes from minor surface issues to major structural failures and you will find a wide variety of treatments to manage them. Plus following an overall maintenance plan from the lifecycle in the pavement will help prevent early failure and keep the asset through its expected lifetime. The best way to get started is always to come with an asphalt engineering firm or quality asphalt contractor assess your position and supply guidance on just what the most competitive course of action would be for the situation.

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