Watermain Rehabilitation Eliminating the need for temporary bypass

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Watermain RehabilitationEliminating the need for
temporary bypass
Derrick Horsman, P.Eng. Alltech Solutions INC
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Overview

• Watermain problems and issues
• Spray Lining Overview
• Same Day Return to Service ?

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The Problem Despite recent increases in public
infrastructure investments, municipal
infrastructure is decaying faster than it is
being renewed.1
1 National Guide to Sustainable Municipal
Infrastructure.
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The Cause Internal (External) corrosion Watermain
breaks Pipe surpassed useful life
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High Rate of Leakage

• Inadequate Fire Protection

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What do we do?
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• Conventional open cut replacement
• Low dig options
• Directional drilling
• Sliplining
• Pipebursting
• CIPP lining
• Traditional Cleaning and Spray Lining
• Cement lining process
• Epoxy lining process
• Modern Cleaning and Spray Lining
• Rapid cure polyurethane system
• Rapid cure high build system

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Spray Lining

• TRADITIONAL CLEANING AND SPRAY LINING
• Cement Lining process
• Epoxy Lining process
• Less expensive
• No reduction in flow capacity
• No requirement to re-tap services
• Some disruption
• Not suitable for certain water types
• Superseded in Europe by polyurethane lining
  systems.
• Requires above ground temporary water supply
  ??

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Spray Lining
TRADITIONAL CLEANING AND CEMENT LINING
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Spray Lining
MODERN CLEANING AND SPRAY LINING Rapid Cure
Polyurethane system Rapid Cure High Build
system
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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• Only approved rapid cure material lt15 sec
• Potential for contamination effectively
  eliminated
• No leaching
• Immediate rectification of lining faults

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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• No requirement for above ground bypass
• Improved customer services multi-stage
  notification process
• Operations carried out during working hours
• Removes potential hazards (ie. Tripping hazards,
  random breaks, security issues)

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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• No requirement for above ground bypass
• Substantially less expensive
• - cost of bypass 20-45 of total job
  (Awwarf)
• Cost of temporary resources reduced
• Shorter construction duration

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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• No requirement for above ground bypass
• Substantially less expensive
• Greatly reduced disruption
• Minimal setup time
• Rapid road reinstatement
• Small job site footprint

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Spray Lining
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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• No requirement for above ground bypass
• Substantially less expensive
• Greatly reduced disruption
• Some revaluation of capital asset?
• No reduction in flow capacity
• Application of 1mm 5mm

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Spray Lining

• MODERN CLEANING AND SPRAY LINING
• Rapid Cure Polyurethane system
• Rapid Cure High Build system
• Same day return to service
• No requirement for above ground bypass
• Substantially less expensive
• Greatly reduced disruption
• Some revaluation of capital asset?
• No reduction in flow capacity
• No requirement to re-tap services

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Spray Lining High Build Structural System
Performance Requirements for Lining Material

1. Tough enough to survive dynamic loading at
   failure
2. Ductile enough to accommodate movement after
   failure
3. Sufficient shear strength to maintain
   longitudinal continuity
4. Sufficient flexural strength to provide long term
   corrosion void spanning capability

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Spray Lining High Build Structural System
1 Bar 14.5 psi _at_3mm 145psi _at_5mm 348 psi
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Spray Lining Rapid Cure Polyurethane

• Rapid Cure Polyurethane North American Experience
• City of Saint John, NB
• City of Moncton, NB
• Atlantic Health Sciences Corporation, Saint John,
  NB
• Millstone Nuclear Power Plant, Niantic, CT, USA
• Region of Niagara, ON
• New York Department of Environmental Protection

• Rapid Cure Polyurethane International Experience
• United Kingdom, Russia, India, Switzerland and
  Malaysia
• More than 8,000 km in the UK by our partner
  affiliates

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QUESTIONS ???
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