Masonry Magazine February 2008 Page. 25
Table 1.
Comparison of Pavements Made with Clay Pavers
Clay Pavers On: | Advantages | Disadvantages
---|---|---
Sand Setting Bed on Aggregate Base | Most durable Cost-effective Easy access to repair underground utilities Good as overlay to existing asphalt or concrete pavement Allows use of semi-skilled labor Can be designed as a permeable pavement | May require a thicker base Intensive cleaning may erode joint sand
Sand Setting Bed on Asphalt Base | Good as overlay to existing asphalt pavement | Intensive cleaning may erode joint sand
Sand Setting Bed an Cement-Treated Aggregate Base | Good over poor soils or in small, confined areas Good as overlay to existing concrete pavement | Intensive cleaning may erode joint sand
Sand Setting Bed on Concrete Base | Good over poor sols or in small, confined armas Good an overfay to existing concrete pavement | Intensive cleaning may erode joint sand Requires good drainage above base Susceptible to greater offset with subgrade movement
Bituminous Setting Bed on Asphalt Base | Reduced horizontal movement and uplift Enhanced waterpenetration resistance | Repairs are more difficult and expersive Little tolerance for paver thickness variations or Inaccurate base elevations
Bituminous Setting Bed on Concrete Base | Reduced horizontal movement and uplift Enhanced water penetration resistance Good over poor solls or in small, confined areas | Repairs are more difficult and expensive Little tolerance for paver Thickness variations or inaccurate base olevations
Mortar Setting Bed Bonded to Concrete Base | Greater tolerance for paver thickness variations or inaccurate base elevation Can be used on steeper slopes and greater vehicle speeds Drainage occurs on the surface | Movemant joints must align through entire paving system Least cost-effective Mortar joint maintenance required Repairs are most dificult and expensive
Mortar Setting Bed Urbonded to Concrete Base | Greater tolerance for paver thickness variations or inaccurate base elevations Movement joints in setting bed and base are not required to align Preferred when used over elevated structural slab Bond break must be used to avoid stresses caused by horizontal movement between layers | Least cost-effective Mortar joint maintenance required Repairs are most difficult and expensive
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February 2008
Masonry 23