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Assessment & Remediation / FILE 14

Remediation Design

Investigation tells you what is wrong. Remediation design tells you how to fix it. We prepare engineering repair specifications that are buildable, cost-effective, and extend the life of your structure by decades.

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Remediation Design on a real Australian project siteEVIDENCE / REMEDIATION-

Remediation design translates investigation findings into engineering repair specifications that contractors can build. Our designs address the root cause of deterioration, not just the visible symptoms. A concrete repair that does not address the underlying corrosion mechanism will fail within years.

We design remediation solutions in accordance with AS 3600:2018 for concrete structures and reference EN 1504 (Parts 1 to 10) for repair product selection, surface preparation, and application methodology. Each design is prepared or certified by an RPEQ-registered structural engineer.

Our remediation designs cover the full spectrum of structural repair: concrete patch repair, crack injection, cathodic protection, protective coatings, carbon fibre strengthening, steel plate bonding, section enlargement, and foundation remediation. We select the most cost-effective solution that achieves the required performance and service life.

We provide tender-ready documentation including repair specifications, drawings, material schedules, quality assurance requirements, and hold point inspection plans. Clear documentation reduces contractor queries, variation claims, and construction defects.

Capabilities

What we deliver

10 deliverables across the remediation design engagement.

  • 01RPEQ-certified repair specifications and drawings
  • 02Concrete patch repair design to EN 1504
  • 03Epoxy and polyurethane crack injection design
  • 04Cathodic protection system specification
  • 05Carbon fibre reinforced polymer (CFRP) strengthening
  • 06Steel plate bonding and section enlargement
  • 07Protective coating and anti-carbonation systems
  • 08Foundation remediation and underpinning design
  • 09Tender documentation and contractor assessment
  • 10Construction-phase quality assurance inspection

Process

Our methodology

01

Investigation Review

Review of investigation data, laboratory results, and structural analysis to confirm the deterioration mechanism and required repair performance. Identification of repair principles per EN 1504.

02

Design Development

Selection of repair methodology, material specification, strengthening design (where required), and preparation of repair drawings, schedules, and quality requirements.

03

Documentation & Tender

Preparation of tender-ready documentation including specifications, drawings, material schedules, hold point inspection plans, and quality assurance requirements.

04

Construction Support

Technical support during construction, hold point inspections, material approval review, and as-built documentation certification on completion.

Use cases

Common applications

  • Multi-storey building concrete remediation
  • Bridge and infrastructure repair design
  • Car park structural strengthening
  • Heritage building conservation repair
  • Marine structure corrosion management
  • Post-fire structural repair specification
  • Retaining wall remediation
  • Strata building remediation programmes

Frequently asked questions

5 questions answered.

Q01

What is the difference between investigation and remediation design?

Investigation determines what is wrong and why. Remediation design determines how to fix it. Investigation identifies the deterioration mechanism, severity, and extent. Remediation design translates those findings into engineering repair specifications that a contractor can build. Both are needed for a successful repair outcome. Design without investigation risks treating symptoms rather than causes.

Q02

How long do concrete repairs last?

A well-designed and properly executed concrete repair should last 25 to 50 years depending on the exposure environment and maintenance regime. The key factors are: correct diagnosis of the deterioration cause, appropriate repair material selection (Class R3 or R4 per EN 1504-3), thorough surface preparation, and adequate quality control during application. Repairs that fail prematurely almost always trace back to one of these factors being deficient.

Q03

Can carbon fibre strengthening increase a building capacity?

Yes. Carbon fibre reinforced polymer (CFRP) bonded to the tension face of concrete beams and slabs increases flexural capacity. CFRP also provides shear strengthening when applied as wraps around beam sections. The material has a tensile strength approximately 10 times that of steel at one-fifth the weight. CFRP is particularly effective for change-of-use upgrades where increased loading must be accommodated without increasing structural member size.

Q04

Do you supervise the construction of your designs?

Yes. We provide construction-phase technical support including pre-construction meetings, material approval review, hold point inspections, and as-built documentation. Hold points are specified at critical stages such as surface preparation verification (before repair material application), reinforcement exposure (to confirm break-out boundaries), and repair thickness confirmation. This quality assurance ensures the design intent is achieved on site.

Q05

Can remediation extend a building life beyond its original design life?

Yes. Many concrete buildings designed for a 50-year service life can be extended to 75 or 100 years with appropriate remediation and protection. The approach depends on the remaining structural capacity and the deterioration mechanism. Cathodic protection can arrest corrosion indefinitely. Protective coatings and migrating inhibitors slow future deterioration. Structural strengthening restores or increases capacity. A combination of these measures, informed by durability modelling, provides the basis for life extension.

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