Line marking contractor in Dubbo NSW completing hospital carpark marking
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Line Marking Dubbo NSW

Hospital, Commercial & Industrial Marking

Professional line marking in Dubbo NSW. Transport NSW approved. Central West NSW hub, Mitchell Highway, Newell Highway. Recycled concrete aggregate sub-base pH leaching assessment. 48hr quote.

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AS/NZS Compliant

Fully Insured

15+ Years

15+ Years Experience

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Recycled Concrete Aggregate Sub-Base Leaches Alkaline pH Through Thin Asphalt — Same Problem as Limestone

A Dubbo hospital carpark extension had been constructed with a recycled concrete aggregate (RCA) base course under asphalt — a common sustainable construction practice in regional NSW where road demolition concrete is recycled rather than landfilled. The asphalt wearing course was 50mm over the RCA base.

Pull-off testing after primer application showed low adhesion values in the lower-lying zones of the carpark extension — 0.9-1.1 MPa in those areas versus 1.6-1.8 MPa in the adjacent original carpark with conventional crushed rock base. The RCA base had residual alkalinity from the original concrete — calcium hydroxide in the recycled concrete leached through the asphalt surface layer with moisture, disrupting the amine epoxy curing mechanism.

The mechanism is identical to the Bunbury WA crushed limestone sub-base issue — both involve calcium-based alkaline materials in the sub-base leaching through thin asphalt to the surface. The identification and treatment approach is the same: pH indicator strip test on the surface, phosphoric acid neutralisation wash where pH is above 9, re-test before priming.

Dubbo is Central West NSW's hub — the intersection of the Mitchell and Newell Highways, the hospital, retail, and government services hub for a vast agricultural and mining hinterland. Transport NSW approved.

Key Benefits

Transport for NSW approved

RCA sub-base pH leaching assessment

Central West NSW regional specialists

SafeWork NSW notice response

Hospital carpark marking in Dubbo NSW after RCA sub-base pH neutralisation treatment

Line Marking Services in Dubbo Dubbo NSW

Hospital, commercial, and industrial carpark marking, recycled concrete aggregate sub-base pH leaching assessment, warehouse floor marking, and road marking across Dubbo and the Central West NSW Mitchell Highway and Newell Highway hub. Whylandra, Goonoo Forest, Wellington, Narromine, Trangie, and Peak Hill also covered. Transport NSW approved. Surface pH tested in all lower-lying zones of any Dubbo thin-asphalt carpark over RCA sub-base before primer.

Carpark Line Marking

Carpark Line Marking

AS/NZS 2890 compliant bays, accessible parking at proper 3.2m widths in Dubbo NSW. Most projects done over weekends so you stay open.

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Warehouse & Factory Marking

Warehouse & Factory Marking

Forklift lanes, pedestrian walkways, hazard zones in Dubbo NSW. Two-pack epoxy for high-traffic areas. Scheduled for zero downtime.

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Road & Traffic Line Marking

Road & Traffic Line Marking

Centre lines, crossings, stop bars in Dubbo NSW. AS 1742 compliant. VicRoads approved. Thermoplastic lasts 5-8 years, not 18 months.

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Line Marking Removal

Line Marking Removal

Complete removal using grinding or 3500 PSI water blasting in Dubbo NSW. No ghost lines bleeding through your new layout.

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Playground & Sports Court Marking

Playground & Sports Court Marking

Courts, games, hopscotch in Dubbo NSW. 12 standard colours or custom matched to your school. Done during holidays, not term time.

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Thermoplastic Markings

Thermoplastic Markings

When paint needs replacing every 18 months, thermoplastic keeps performing for years in Dubbo NSW.

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Factory Floor line Marking

Factory Floor line Marking

Professional factory floor marking for 5S lean manufacturing, and machine areas in Dubbo NSW. Chemical-resistant epoxy options. WHS compliant. Upload plans for quote.

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School Playground Line Marking

School Playground Line Marking

Professional school playground line marking across Dubbo NSW. Games, sports zones, play areas, educational markings. Upload plans for detailed quote today.

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Airport Line Marking

Airport Line Marking

Specialist airport line marking to CASA Part 139 MOS standards in Dubbo NSW. Runways, taxiways, aprons, and airside roads. ASIC cleared crews. Upload plans for quote.

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Call: 0468 069 002

Our Recent Projects

Carpark Re-Line & Accessible Bays

Carpark Re-Line & Accessible Bays

15/03/2024

Carpark Line Marking
Council Road & Traffic Marking

Council Road & Traffic Marking

22/11/2024

Road & Traffic Line Marking
Full Surface Line Removal

Full Surface Line Removal

10/10/2024

Line Marking Removal
Warehouse Safety Upgrade

Warehouse Safety Upgrade

28/09/2024

Warehouse & Factory Line Marking
School Playground Repainting

School Playground Repainting

15/08/2024

Playground & Sports Court Marking
Site Compliance Audit & Corrections

Site Compliance Audit & Corrections

03/07/2024

Compliance Audits

Frequently Asked Questions

Yes. Dubbo Mitchell Highway and Newell Highway commercial and hospital carparks are part of our Central West NSW schedule. RCA sub-base pH leaching assessment for any new construction carpark with recycled aggregate base. We've completed 5,000+ projects nationally since 2009 and carry $20M public liability insurance. Every Dubbo quote includes a site assessment, surface condition report, and fixed pricing. No estimates that change at invoicing. For SafeWork NSW improvement notices we can typically assess within 24 hours and deploy within 48-72 hours. Completion comes with photo documentation, a compliance statement, and material specifications. Transport NSW approved for any road or carpark marking that requires local council or state road authority sign-off.

The project's civil construction specification will document the sub-base material. The pavement design report (if available) will also specify the base course material. Alternatively, the construction project manager or the civil contractor can confirm the base course material from their records. Line Marking Australia has been completing marking across Dubbo and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, Transport NSW approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.

Yes. NSW Government sustainability policies encourage the use of recycled construction materials in road and pavement construction. RCA from road demolition projects is increasingly specified as sub-base material in regional NSW. This makes RCA pH leaching an increasingly common consideration for marking in regional NSW carparks constructed in the last 5-10 years. Line Marking Australia has been completing marking across Dubbo and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, Transport NSW approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.

The alkalinity in RCA reduces over time as the calcium hydroxide is exhausted through carbonation and leaching. In a mature carpark that's been in service for 10+ years, the RCA alkalinity has typically stabilised. The issue is primarily in newer RCA sub-base carparks — generally less than 5 years old — where the alkalinity hasn't been depleted yet. Line Marking Australia has been completing marking across Dubbo and surrounds since 2009, with 5,000+ projects nationally. We carry $20M public liability and $10M professional indemnity insurance, Transport NSW approved. Every job comes with fixed pricing, photo completion documentation, compliance certification, and material specifications. Upload your site plans at linemarkingaustralia.com.au for a detailed quote within 48 hours, or call Niel Bennet on 0417 460 236 for urgent jobs.

Transport for NSW approved since 2009. Approval means we meet the contractor qualification, insurance, and technical standards required to work on state roads and local government road networks. We carry $20M public liability and $10M professional indemnity coverage, which your risk manager or procurement team can request in writing. All road marking work in Dubbo is done to AS 1742.3 traffic control standards with retroreflective thermoplastic to AS/NZS 1906.3. Traffic management plans are provided before every job. You receive as-built completion photos, a compliance statement, and material certification on completion. We also cover Wellington, Narromine, Trangie on the same schedule.

Line Marking Near Dubbo

We cover Central West NSW's full hub and surrounding region.

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