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Lime in construction Applications and benefits of lime in road and pavement construction Paul Edwards
Lime in construction
Applications and benefits of lime in road and pavement construction
Paul Edwards
Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
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Overview
1. Applications
2. Benefits
3. Making it happen
Applications
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Applications and benefits of lime in road and pavement construction
Lime as an activator in Hydraulic Bound Mixtures
Aggregate Hydraulic binder(s)Water
Mixing, compaction and curing
Applications and benefits of lime in road and pavement construction
Markets: wide range of roads and pavements
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Applications and benefits of lime in road and pavement construction
Markets: road and pavement
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Foundations, base & binder layers
Options for maintenance (haunches), widening and new build
Applications and benefits of lime in road and pavement construction
Markets: applications within reinstatement works
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Applications and benefits of lime in road and pavement construction
Markets: within temporary/permanent works
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Applications and benefits of lime in road and pavement construction
Lime as an activator in Hydraulic Bound Mixtures
Recycled asphalt planings
Hydrated lime & pulverised fuel ash
Water
FABGM
Applications and benefits of lime in road and pavement construction
Standards and Specifications
• HA Specification for Highway Works: Series 800
• BS EN 14277: Hydraulically bound mixtures – specifications
• BS EN 13242: Aggregates for unbound and hydraulically bound materials for use in civil engineering work and road construction
• BS EN 13286: Unbound and hydraulically bound mixtures –test methods
Applications and benefits of lime in road and pavement construction
Design for Highways, Streetworks and other pavements
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Benefits
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Applications and benefits of lime in road and pavement construction
Material resource efficiency and environmental benefits Proven performance
Sustainable
Secondary and recycled materials
Energy savings
Carbon reduction
Reduced thickness of asphalt hence further carbon reduction
Conserves natural resources
Reduced lorry movements, less emissions, less impact on community
Re-use of on-site material
Reduced landfill
Applications and benefits of lime in road and pavement construction
Wide range of aggregates can be used in HBMs
BS EN 13242 (BSEN 14227 - 1 to 5)
Crushed or uncrushed
Natural, artificial or recycled
Performance based on mixture
Applications and benefits of lime in road and pavement construction
Selection of hydraulic binder and technique
Soil / aggregate suitability
Grading
Mineralogy / chemistry
Plasticity
Aggregate properties
Short-term trafficking requirements
Construction periods
Time of year
Temperature
Quality control
Economics
Applications and benefits of lime in road and pavement construction
Quality control - batching
Applications and benefits of lime in road and pavement construction
Quality control - batching
Applications and benefits of lime in road and pavement construction
Specific technical advantages of FABGM utilising lime
• Aggregates:
• Recycled asphalt planinings
• Utility recycling
• Potential to stockpile
• Bond between layers
• Design for immediate overlay
• Workability
• Avoids over strong cement bound layers
Function of curing and
strength gain
Applications and benefits of lime in road and pavement construction
Laboratory curing for durability & performance
Applications and benefits of lime in road and pavement construction
365 day design values….
Fly Ash Bound Granular Mixture
BUT don’t forget the short term
Applications and benefits of lime in road and pavement construction
Why should I use HBMs?
Proven long term performance and durability
Available technologies
Tax and environmental issues
Reduction in project costs
Can be laid and compacted at low temperatures
Lower carbon emissions
Part of innovative and versatile design solutions
Wide range of materials suitable for use
Making it happen
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Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
Applications and benefits of lime in road and pavement construction
* early involvement = add greatest value to client
Making it happen
Applications and benefits of lime in road and pavement construction
WRAP technical reports
Thank you for your attention
Paul Edwards – Pavements Commercial ManagerURS Infrastructure & Environment UK Limited
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