engineering the future. © stabilor 2015, all rights reserved© laing o’rourke 2014, all rights...
TRANSCRIPT
Engineering the future
© Stabilor 2015, all rights reserved© Laing O’Rourke 2014, all rights reserved
Agenda
1. Laing O’Rourke – Introduction
2. Pavements and Stabilor– Introduction
3. Stabilor – Progress so far
4. Stabilor – Design and application
5. Stabilor – Selected projects
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A Proud History of Achievement
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Laing O’Rourke at a glance
$60 BillionsIchthys – LNG Marine Terminal
Darwin, Australia
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Pavement Construction Overview
Flexible/granular pavements
Requires imported materials
Cost depends on aggregate supply
Poor wet weather performance Subgrade
Subbase
Base
Wearing course
Imported material
Cement-stabilised pavements
Can be used in rigid or flexible pavements
Requires additional equipment and materials
Can use recycled, site-won, or marginal materials
Improved wet weather performance
Subgrade
Stabilised base
Wearing course
Recycled or site-
won material
Rigid pavements
Concrete base and wearing course
Expensive
Low maintenance
Performance dependent on base and subgrade
Subgrade
BaseImported material, often
stabilised
Concrete slab
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Why Pavements Fail
Underlying soils – insufficient strength or shrink/swell reactivity in the subgrade.
Water – causes a loss of pavement mechanical strength. Free water within the pavement is ‘pumped’ up towards the surface by vehicular loading,
drawing the finer particles out of the soil matrix and providing space for lubricated particles to move.
Traffic and loading – excessive and poorly regulated traffic volume and loadings.
Traffic effects are magnified in acceleration/deceleration zones.
Pavement materials – insufficient strength, unsuitable particle size distribution,
or reactive materials.
Design – insufficient consideration of drainage, shoulders, cross falls, lane widths, etc.
Construction – lack of experience and equipment, poor QA and testing, particularly of moisture content and compaction.
Temperature – causes expansion, contraction, and freeze-thaw in the pavement and wearing course. Large temperature variations accelerate failures.
Maintenance – primarily a failure to maintain the wearing course, leading to water ingress.
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Stabilor Overview
Forms durable, water resistant, and rapidly installed pavement infrastructure.
Non-hazardous and non-dangerous.
Liquid additives that enhance the application process and performance of cement-stabilised infrastructure.
Stabilor C:
Concentrated one-part aqueous dispersion of a copolymer, set time modifiers, and preservative agents. The economical
solution for most construction and rehabilitation projects.
Stabilor P:
One-part dispersion of cross-linking polymer, set time modifiers, hydrophobic particulates, and preservative agents.
For use in applications with high water exposure.
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Stabilor Key Benefits
Has enjoyed brilliant (no-failure) success in the road construction industry in Australia, Asia & Europe for over a decade.
Bonds the molecules of in-situ soil, cement and aggregate into a solid waterproof polymer that ‘floats’ on sub-grade with enhanced
strength and flexibility (CBR & MPa > 500%).
Reacts with cement to create an exothermic chemical reaction that ‘cures’ within +/- 3 hours. Traffic may be re-introduced immediately
upon completion of roll-out.
Is impervious to water penetration from rain, flood and capillary action. Hence a Stabilor-Road does not endure expansion & contraction during freeze &
thaw cycles.
Is inert and unaffected by temperature range from 60 above to 60 below zero Celsius; it can be applied in rain and near freezing
weather thus increasing the build season.
Virtually eliminates quarry and transport of heavy rock, stone and fines thus it cuts material & labor costs vs. conventional road
construction + low to NO maintenance.
Spec's, videos & engineering test reports visit: www.stabilorcanada.ca
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Applications
Roads
Subgrade, subbase, and base stabilisation for new construction and
rehabilitation of temporary and permanent pavements
Hardstands
New construction and rehabilitation of laydown yards, site set-up, stock
yards, and related infrastructure
Heavy work platforms
Crane mats, piling platforms, drilling rigs
Airports
Runways and associated aprons
Railway
Stabilisation of subgrade and formation
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Design & Application Process
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Soil Stabilization Process
① Binding Agent Spreader
② Soil Stabilizer
③ Single-Drum Compactor
④ Grader
⑤ Single-Drum Compactor
⑥ Pre-Spread Binding Agent
⑦ Milling and Mixing Rotor
⑧ Stabilized, Homogeneous Mix
of Soil and Stabilor
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Selected Projects
Inpex Village ring road, NT
Overview: The traditional 2-layer imported granular road failed in the wet season
Design: Pavement rehabilitation with additional fill
In situ material of CBR <10% plus 50mm of imported fill of CBR 30%
200mm, 16kg/m2 (4%) GP cement, 0.5L/m
2 Stabilor C
Results: CBR >300%
UCS 2.4-4.4MPa
Economics: Capex 33% less than granular pavement ($25/m2 vs $37/m
2)
No wet season maintenance
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Selected Projects
Inpex Village ring road, NT
Stabilor
Stabilor
No Stabilor No Stabilor
Excavator on Stabilor 280t crane on Stabilor
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Selected Projects
Blaydin Point main access road, NT
Overview: Traditional 2-layer imported granular road that failed in the wet
and under heavy vehicle traffic
Design: Pavement rehabilitation of 180mm subbase (CBR 50%) and 180mm base (CBR 80%) with 2-coat spray seal
250mm, 20kg/m2 (4%) GP cement, 0.75L/m
2 Stabilor C
Results: CBR >250%
Dynamic deflection modulus +22% (15 hours), +120% (2 days)
Economics: Capex 50% less than asphalt-based solution
Night work, so no shutdown of the main access road
Testimonial: “The use of Stabilor added real time savings in the pavement construction for the module off load
haul road on the Ichthys Project.
The application of Stabilor to provide a surface pavement instead of an asphalt surface ensured that we were able to received the
first modules on time.”
Ross McEwen, JKC Resident Construction Manager
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Selected Projects
Blaydin Point main access road, NT
Before Stabilor After Stabilor
Stabilor
No Stabilor
StabilorNo Stabilor
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Selected Projects
Pacific Highway, Tabbimobile, NSW
Overview: A 2.2km widening and rehabilitation of the major north-south road,
with high probability of rain events and delays.
The project was conducted under traffic of >6,000 vehicles per day.
Design: 300mm, 16kg/m2 (3%) GP cement, 0.4L/m
2 Stabilor C
Results: 4,500m2/day
Average UCS 3.5MPa
Economics: Project delivered 3 months faster than original flexible design
A large reduction in wet weather claims on the project
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Selected Projects
Pacific Highway, Tabbimobile, NSW
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Selected Projects
Teras Australia Marine Base, NT
Overview: Site roads and hardstands inoperable in the wet season
Design: Rehabilitation of existing granular pavements
Road: 250mm, 20kg/m2 (4%) GP cement, 0.5L/m
2 Stabilor C
Hardstand: 250mm, 24kg/m2 (4.8%) GP cement, 0.6L/m
2 Stabilor C
Results: Road: CBR >200% (+600%)
Dynamic deflection modulus +100% after 3 hrs, +200% after 24 hrs
Hardstand: CBR >80% (+600%)
Dynamic deflection modulus +380%
Economics: Areas remain fully operational in the wet
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Selected Projects
Teras Australia Marine Base, NT
Stabilor stabilisation of the hardstand
Finished hardstand pavement
$60 BillionsIchthys – LNG Marine Terminal
Darwin, Australia