Engineering the future. © Stabilor 2015, all rights reserved© Laing O’Rourke 2014, all rights...

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

© Stabilor 2015, all rights reserved

A Proud History of Achievement


Laing O’Rourke at a glance

$60 BillionsIchthys – LNG Marine Terminal

Darwin, Australia


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


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.


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.


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


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


Design & Application Process


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


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


Selected Projects

Inpex Village ring road, NT

Stabilor

Stabilor

No Stabilor No Stabilor

Excavator on Stabilor 280t crane on Stabilor


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


Selected Projects

Blaydin Point main access road, NT

Before Stabilor After Stabilor

Stabilor

No Stabilor

StabilorNo Stabilor


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


Selected Projects

Pacific Highway, Tabbimobile, NSW


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


Selected Projects

Teras Australia Marine Base, NT

Stabilor stabilisation of the hardstand

Finished hardstand pavement

$60 BillionsIchthys – LNG Marine Terminal

Darwin, Australia

Engineering the future. © Stabilor 2015, all rights reserved© Laing O’Rourke 2014, all rights...

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Transcript of Engineering the future. © Stabilor 2015, all rights reserved© Laing O’Rourke 2014, all rights...