Business Park Pavement Management
Comprehensive whitepaper from StructureTec regarding pavement management programs which can be applied to any business or industrial park. It covers the main issues with pavement management and includes a glossary of pavement terms.
Proper pavement maintenance is essential to any organization that has the responsibility for maintaining the condition of parking lots, loading docs, etc. Pavement upkeep is critical to not only providing a professional appearance, but also to creating a safe environment for both employees and guests. Uneven pavement can become a liability and an accident waiting to happen. A good pavement management program will help you develop a plan that will fit the purpose based on individual owners’ needs as traffic patterns and load requirements demand. A pavement management program will help you prioritize needed improvements along with projected budgets.
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Pavement Management Glossary:
Alligator/Fatigue Cracking – Alligator or fatigue type cracking is the interconnecting of cracks forming small pieces ranging in size from 1” to approximately 6”. This is caused by failure of the surface due to traffic loading (fatigue) and very often also due to inadequate base or sub-grade support. Neglected or poorly sealed cracks exposed to moisture and temperature changes can quickly grow into “alligatored” areas that then turn into potholes. The cracking pattern is similar to an alligator’s skin or chicken wire fencing.
Asphalt Cement – A dark brown to black cementitious material in which the predominating constituents are bitumens which occur in nature or are obtained in petroleum processing. In varying proportions, asphalt is a constituent of most crude petroleums. Penetrations grades vary.
Cement (Portland) – A hydraulic cement produced by pulverizing clinker consisting essentially of hydraulic calcium silicates, and usually containing one or more of the forms of calcium sulfate as an inter-ground addition.
Climatic Conditions – Given the climate of this pavement section, it is anticipated that the rate of deterioration will be
Excessive Loading Factor – Given the observed traffic conditions and use of this pavement section, it is anticipated
that this pavement will undergo a more rapid rate of deterioration.
Flexible Pavement – A pavement structure which maintains intimate contact with and distributes loads to the sub-grade
and depends on aggregate interlock, particle friction, and cohesion for stability; cementing agents, where used, are generally bituminous materials as contrasted to Portland cement in the case of rigid pavement.
Hot Mix Asphalt (HMA) – The bound layers of a flexible pavement structure, which is a mixture of coarse and fine
aggregate, and asphalt binder.
Life Cycle Cost Analysis (LCC) – The investigation and valuation of the environmental impacts of a given product or
service caused or necessitated by its existence.
Longitudinal Cracking (Roadway) – Cracks running in the direction of traffi c are longitudinal cracks.
Potholes – Pot-shaped holes caused by a weak base or sub-grade soil. Potholes are the complete failure of an asphalt pavement structure. Typically, the potholes are formed from small sections of severely alligatored areas that break free
of the asphalt pavement.
Raveling – Progressive loss of pavement material from the surface downward caused by lack of bond between the asphalt binder and aggregate material, leaving a rough, jagged or wavy surface. Poor initial compaction during construction,cold weather construction, insufficient asphalt cement content, and/or environmental aging can all be causes of raveling.
Rigid Pavement – Pavement that will provide high bending resistance and distribute loads to the foundation over a comparatively large area.
Rutting (Roadway) – Grooves that develop in the wheel tracks of the pavement. Channels may result in consolidation or lateral movement under traffic in one or more of the underlying courses. It can also be the displacement of the asphalt surface layer itself. A yielding sub-grade, insufficient compaction during construction, or a lack of structural strength in the pavement structure typically causes rutting.
Spalling – Loss of one or more pieces of the pavement from the surface, usually along cracks, joints, or edges. Aging, deterioration, and/or poor quality materials can cause spalling.
Transverse Cracking (Roadway) – A crack at approximately right angles to the roadway.