Paths and paving – concrete cracks

Cause

Overloading for path design such as vehicles driving over paths 

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

Poor quality concrete

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

Inadequate base preparation

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

Unreinforced concrete

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

Soil settlement

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

No expansion joints installed when the concrete was poured

Repair

  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)

Cause

Tree roots

Repair

  • remove tree roots, repair concrete
  • if deterioration is minor, sawcut across the path each side of the damage and remove existing concrete; box and place a new concrete section
  • alternatively, remove existing concrete; place a compacted metal (gravel) base course; lay new concrete – a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)