Common Asphalt Defects – Asphalt Repair from Munson Inc Milwaukee

We frequently do asphalt repairs for customers whose original asphalt paving contractor cut corners on quality in order to be lower priced.

Many years ago, MUNSON made a fundamental decision – to explain our price one time rather than have to apologize for poor quality forever. You’ll be glad we did.

Common Asphalt Defects: Pot Holes and More

Pot Holes: Small, bowl-shaped depression in the asphalt that penetrates deep down into the base. They are the result of moisture infiltration.

Possible Causes

  1. Continued deterioration of another type of distress, such as thawing of a frozen subgrade, cracking, raveling, or a failed patch after pieces of the original pavement surface have been dislodged
  2. Poor surface mixtures
  3. Weak spots in the base or subgrade
  4. Severity of the surrounding distress and traffic action accelerate potholes

Depressions:  Depressions are indentations in the asphalt and are most noticeable after it rains.

Possible Causes

  1. Settlement or failure in the lower pavement layers
  2. Improper construction techniques

Rutting: Channelized depressions in the wheel tracks caused by insufficient pavement thickness; lack of compaction of the asphalt, stone base or soil; weak asphalt mixes; or moisture infiltration.

Possible Causes

  1. Consolidation or lateral movement of any of the pavement layers or the subgrade under traffic
  2. Insufficient design thickness
  3. Lack of compaction
  4. Weaknesses in the pavement layers due to moisture infiltration
  5. Weak asphalt mixtures

Raveling: separation of aggregate particles in a pavement from the surface downward or from the edges inward. Usually, the fine aggregate wears away first and then leaves little “pock marks” on the pavement surface. As the erosion continues, larger and larger particles are broken free and the pavement soon has the rough and jagged appearance typical of surface erosion.

Possible Causes

  1. Asphalt binder has hardened excessively
  2. Poor-quality mixture
  3. Usually requires the presence of both traffic and water to occur

Shoving: The formation of ripples in the pavement.

Possible Causes

  1. Mixtures too high in asphalt
  2. Low air voids
  3. Fine aggregate content too high
  4. Excessive moisture or contamination in the granular base
  5. Smooth or rounded aggregate
  6. Incorrect asphalt grade

Upheaval: Localized upward movement in a pavement due to swelling of the subgrade.

Possible Causes

  1. Expansive soils (which swell in the presence of moisture)
  2. Frost heave (in which ice lenses grow beneath the pavement, causing the pavement to crack)

Bleeding:  When asphalt binder fills the aggregate voids during hot weather and then expands onto the pavement surface

Possible Causes

  1. Asphalt binder has hardened excessively
  2. Poor-quality mixture
  3. Usually requires the presence of both traffic and water to occur

Common Asphalt Defects: Cracking

Longitudinal Cracking: Running parallel to the pavement’s centerline, longitudinal cracks are the result of pavement fatigue, reflective cracking, and/or poor joint construction.

Transverse Cracking: Running perpendicular to the pavement’s centerline, transverse cracks are the result of reflective cracks from an underlying layer, daily temperature cycles, or poor construction.

Possible Causes

  1. Poorly constructed paving joint crack
  2. Shrinkage of the asphalt layer
  3. Daily temperature cycling
  4. Cracks in an underlying layer that reflect up through the pavement
  5. Longitudinal segregation caused by the improper operation of the paver

Edge Cracking: Running along the inside of the pavement surface, within one or two feet, edge crack are the most common type of asphalt defects. Edge cracks result from an underlying base material that has settled and weakened.

Possible Causes

  1. Lack of lateral support
  2. Settlement of underlying material
  3. Shrinkage of drying out soil
  4. Weak base or subgrade layer
  5. Poor drainage
  6. Frost heave
  7. Heavy traffic or vegetation along edge

Joint Reflection Cracking: When a flexible pavement overlay is placed over a rigid pavement, like asphalt over concrete, cracks can appear. These are known as joint reflection cracks and they occur directly over the underlying rigid pavement joints.

Possible Causes

  1. Differential movement between the asphalt and concrete layers
  2. Can deteriorate further under heavy traffic

Slippage Cracking: Appearing as crescent-shaped cracks, slippage cracks occur where the new material has slipped over the underlying course.

Possible Causes

  1. Lack of a good bond between surface layer and the course beneath due to dust, oil, dirt, rubber, water and other non-adhesive material
  2. Tack coat has not been used
  3. Mixture has a high sand content
  4. Vehicular turning or stopping movements in pavements with a low-strength surface mix

Alligator Cracking (Fatigue): Alligator cracking is a load associated structural failure that can be caused by weakness in the surface, base or sub grade; poor drainage; a surface or base that is too thin; or all three.

Possible Causes

  1. Excessive loading
  2. Weak surface, base, or subgrade
  3. Thin surface or base
  4. Poor drainage
  5. Any combination of 1-4

 

Block Cracking: unlike alligator cracking, block cracking is not load-associated. Instead, block cracking is caused by shrinkage of the asphalt pavement due to an inability of asphalt binder to expand and contract with temperature cycles.

Possible Causes

  1. Old and dried out mix
  2. Mix was placed too dry
  3. Fine aggregate mix with low penetration asphalt & absorptive aggregates
  4. Aggravated by low traffic volume

Paying attention to details… That’s how MUNSON-ARMSTRONG PAVING DIV. has built its name and reputation since 1963.

Details like considering variable ground and soil conditions, refusing to take short-cuts in the necessary prep work – and then demanding nothing less than the finest quality finish work. Our goal is simple – to provide asphalt and concrete construction that lasts! Of course, we do offer maintenance services and repair work for asphalt paving in Milwaukee. We frequently do repairs for customers whose original asphalt paving contractor cut corners on quality in order to be lower priced. Many years ago, MUNSON made a fundamental decision – to explain our price one time rather than have to apologize for poor quality forever. You’ll be glad we did.

Paving, asphalt paving, paving contractors, Milwaukee, Milwaukee paving

Asphalt Paving Milwaukee, Paving, Milwaukee, Munson Inc, Fencing Contractor, Paving Contractor, Asphalt, Paving Milwaukee, MUNSON, INC.

6747 N. Sidney Place Glendale, WI 53209

Phone: (414) 351-0800 or (800) 236-0340

Fax: (414) 351-0879

info@munsoninc.com

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