CONCRETE ROADS FOR LOW TRAFFIC VOLUMES

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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