concrete roads for low traffic volumes
DESCRIPTION
CONCRETE ROADS FOR LOW TRAFFIC VOLUMES. Brian Walker BCP Engineers. Advantages Of Concrete Roads. Ideal for emerging contractors Low capital costs on plant Can be laid on very steep grades Little or no layerworks required Low maintenance costs. Ideal for emerging contractors. - PowerPoint PPT PresentationTRANSCRIPT
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CONCRETE ROADS FOR LOW TRAFFIC VOLUMES
Brian Walker
BCP Engineers
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Advantages Of Concrete Roads
• Ideal for emerging contractors
• Low capital costs on plant
• Can be laid on very steep grades
• Little or no layerworks required
• Low maintenance costs
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Ideal for emerging contractors
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Low Capital Costs on Plant
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Can be laid on very steep grades - - greater than 25%
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Little or No Layerworks
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Low maintenance costs
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Some Problems With Concrete Roads
• Incorrect aspect ratios
• Irregular shaped panels
• Settlement of fills
• Late saw cutting of joints
• Plastic shrinkage cracks
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Incorrect aspect ratio of panel
- Must be less than 1.2
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Irregular shaped panels
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Settlement of Fills
Late Saw Cutting of Joints
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Plastic shrinkage cracking
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Other Types Of Concrete Roads
• Rollcrete
• Interlocking concrete blocks
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Rollcrete
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Interlocking Concrete Blocks
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Some Concrete Road Projects
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Wiggins Umkhumbane
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Brooks Farm
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Cato Manor
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Westrich
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Cost Comparisons Asphalt/concrete
S-B G2 Premix 25 Mpa
Conc.
Total
Asphalt R25 R28 R21 R0 R74
Conc. R0 R0 R0 R87.50 R87.50
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Summary
• Lower maintenance costs
• Helping emerging contractors
• Low capital cost of plant
• Ideal for steep grades
• Can reduce the cost of drainage
• Reduced requirement for scarce layerwork material
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How Not To Build A Road
• Inappropriate surfacing
• Combined withno maintenance