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REMEDIALENGINEERING

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REMEDIAL SPECIALISTS

Our Services division offers a range of specialist construction services to property and asset owners and managers, local authorities designers, contractors and mining companies.

WE UNDERSTAND CONCRETE

We have a unique understanding of concrete. We understand the long term behaviour of concrete subjected to adverse structural forces and attacks by both natural and man made agents. This depth of experience and technical expertise ensures comprehensive investigation and remediation of structures by our engineers and specialist tradespeople.

We are well equipped to undertake projects wherever the location. Our proven track record and experience in remediation projects - as well as our focus on safety, quality and environment - ensures SRG are the right people for the job.

Our key focus is to deliver high quality solutions in a safe and sustainable manner to the benefit of the project, client and community.

To compliment this, SRG have experienced personnel as registered building practitioners and our company is a member of the Australian Concrete Repair Association.

SAFETY, QUALITY, ENVIRONMENT

Safety, Quality and the Environment are paramount to SRG. We believe that responsible health and safety management as well as superior health and safety performance is integral to an efficient and successful project.

Being a customer focused organisation with an intense desire to be the best in our field, SRG operates and complies with the requirements of the following Quality Management, Environmental Management and Occupational Health & Safety Management Systems.

With the focus of delivering a high quality product and design in a safe and sustainable manner to the benefit of the project, client and community. SRG has gained Federal Safety Commission

accreditation.

SERVICES

Remedial diagnosis and investigation

Concrete repair

Waterproofing

Structural crack repair

Structural strengthening

Facade restoration

Architectural restoration

Cathodic protection

Specialised services

Bridge Deck Replacement

Carbon Fibre Design and Installation

Protective coatings

Occupational Health & Safety Management System

AS/NZS 4801:2001

OHSAS 18001

Quality Management System

ISO 9001:2008

Environmental Management System

AS/NZS ISO 14001:2004

SRG is a well established professional engineering and

contracting operation with over 50 years experience.

We are currently operating from offices throughout

Australia as well as Hong Kong and the Middle East.

With solid expertise in construction, structural design, facade engineering and remedial services, complemented with the latest European technologies, SRG has the resources to report accurately on the issues needing investigating.

Typical investigative roles undertaken by SRG include:

�� Defect mapping

�� Facade concrete spalling and crack investigation

�� Cladding and render delamination surveys

�� Joint and structural crack investigation

�� Waterproofing and water penetration

�� Reporting and repair budget assistance

�� Design and remediation advice

�� Carbon fibre design and analysis

SRG’s investigative techniques may involve destructive and/or nondestructive test methods including:

�� Carbonation testing

�� Schmidt hammer and compressive strength testing

�� Electronic cover meter surveys (to concrete structures)

�� Half cell potential mapping

�� Adhesion (bond strength) testing

�� Monitored water testing of facades, roofs and terraces

�� Localised breakout and subsequent reinstatement

SRG also perform “make safe” works to address problems that require immediate action. These interim measures allow more time for comprehensive actions to be developed with regards to any structural problems.

Continuity testing for ICCP

Understanding the extent and condition of any

structural defect is critical to the process of

rectification. Correct diagnosis requires expert

investigation. SRG can provide the necessary

experience and knowledge to ensure the best solutions

are developed.

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REMEDIALDIAGNOSIS & INVESTIGATION

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From facades and dome roofs through to bridges and arches, we have gained valuable experience working closely with clients to use the most appropriate repair techniques to suit their structure. This is supported by site personnel with skills in detailed plastering, pattern making, epoxy injection, rendering, bricklaying and carpentry.

Typically, our architectural restoration work involves a combination of the following specialist techniques:

�� Condition surveys

�� Detailed render repair

�� Concrete spalling repair

�� Crack repair by full-depth epoxy injection

�� Application of protective coatings

�� Pressure grouting

�� Masonry repair

�� Carbon fibre strengthening

�� Electrochemical systems

SRG have completed repair and restoration works to a variety of significant structures including several heritage listed buildings and bridges.

When a heritage structure is in need of rehabilitation or

preventative maintenance, it is essential that the right

method of repair be selected. It is also essential that the

work be carried out with care and precision by highly

skilled and experienced personnel.

ARCHITECTURAL RESTORATION

Application of decorative coating to concrete facade

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Atmospheric and environmental conditions can impact concrete structures over time, triggering reinforcement corrosion and spalling of the outer concrete layers. If left untreated, expensive problems will usually result.

SRG has the expertise to not only accurately diagnose such problems but to repair the concrete with skill and expediency.

A poorly executed repair can often reduce the structure’s life span, significantly increasing the long term maintenance costs.

Typical concrete repair works undertaken by SRG include:

�� Repair of concrete spalling (often referred to as ‘concrete cancer’)

�� Render repair

�� Crack repair by full depth epoxy injection

�� Treatment and/or replacement of corroded reinforcement

�� Cathodic protection

�� Application of protective coatings

�� Carbon fibre strengthening

Lighting restoration on Church Street Bridge, VIC

Concrete deterioration causes serious problems for

many structures ranging from the smallest residential

complex to large commercial buildings and civil

structures.

CONCRETE REPAIR

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Repair and strengthening works to the M80 Upgrade, VIC

Restoration of the Green Cape Lighthouse, Eden NSW Concrete facade repairs using swing stage scaffolding

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Specialist skills, design expertise, product knowledge and full-time project management are all required to ensure that strengthening works achieve design code compliance with minimal disruption to the ongoing use of the structure.

SRG are your ideal partner for such projects. Our structural engineers can provide carbon fibre design and certification and our site teams are skilled in the required application techniques.

Typical strengthening projects undertaken by SRG include:

�� Strengthening aged or damaged structures

�� Rectifying faulty construction

�� Bridge stabilisation and repair

�� Bridge code-compliance works

�� Removing beams / columns while strengthening remaining structure

�� Specialised in-house design

Slab strengthening utilising near surface mounted carbon fibre strengthening techniques

Adding strength to an existing structure is usually

a complex challenge. Whether through age,

deterioration, substandard construction or change of

use, it means that the present structure is no longer

able to support the loads it needs to carry.

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Strengthening of concrete carpark columns utilising carbon fibre

Completed carbon fibre strengthening around existing services Strengthening of bridge using carbon fibre

Bridge strengthening at the Narracan Dam

AWARD WINNING PROJECT BARWON RIVER BRIDGE

SRG received an award from the Australasian Concrete Repair Association (ACRA) in recognition of excellence in remedial concrete repair services for the STRENGTHENING category.

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Unfortunately, many facades suffer premature deterioration to the degree that weather proofing of structural integrity is compromised. Facade refurbishment involves determining the true causes of such problems and then applying the appropriate solutions.

Rectifying defective facades can often be highly challenging, as problems may only be apparent under particular weather conditions and access for close examination is usually difficult. This is where the expertise of SRG is an advantage.

With years of experience solving tough problems, we know that only a totally professional approach will be successful. Whether heritage cottage or post modern skyscraper, concrete, brick or glass.

SRG undertakes all manner of facade restoration, including:

�� Detailed examination and reporting

�� Reinstatement of weather sealing

�� Window system replacement

�� Precast concrete repairs

�� Masonry spalling or cracking

�� Lintel replacement

�� Decorative finishes and surface coatings

�� Concrete and render repair

Facade restoration of the iconic Palais Theatre, St Kilda VIC

The function of the exterior cladding, or facade of a

building structure is usually straight forward - to be

attractive, durable, windproof, waterproof and dust

proof.

FACADERESTORATION

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Facade refurbishment works Midtown Plaza, Central Melbourne VIC

Facade refurbishment works at Punt Hill Apartments, Melbourne VICArtwork installation following repair works by SRG on Melbourne’s Hosier Lane.

AWARD WINNING PROJECT MIDTOWN PLAZA VICTORIA

SRG received an award from the Australasian Concrete Repair Association (ACRA) in recognition of excellence in remedial concrete repair services for ‘Building and Remediation over $2M’.

AWARD WINNING PROJECT PUNT HILL APARTMENTS

SRG received an award from the Australasian Concrete Repair Association (ACRA) in recognition of excellence in remedial concrete repair services for the BUILDINGS category.

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Failure of waterproofing can lead to a rapid escalation of costs, underscoring the critical role played by waterproofing in today’s structures.

SRG have been installing waterproofing systems for over 30 years. Our total independence from product suppliers guarantees that we always specify the system which best suits each project. In addition, all works are meticulously planned and supervised by professional project managers, resulting in industry leading quality standards.

Typical waterproofing works undertaken by SRG include:

�� Roof waterproofing and drainage works

�� Construction joint remediation within liquid retaining structures

�� Facade, concrete and render repairs

�� Treatment of external terraces and balconies

�� Injection water stopping

Application of waterproofing

Waterproofing systems are the main barrier preventing

water from penetrating into buildings through roofs,

walls and exposed balconies.

WATERPROOFING

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SRG utilises epoxy resins with viscosities close to that of water to penetrate into micro-cracks as fine as five hundredths of a millimeter, re-establishing the monolithic nature of the concrete.

Principal causes of concrete cracking may include:

�� Shrinkage during curing

�� Construction joints

�� Thermal shock

�� Extreme atmospheric pressure

�� Overload

�� Usage conditions

�� Seismic activity

�� Differential settlement

�� Human error

The very small cracks which develop under these various conditions create the risk of further cracking under load and hence the cycle of deterioration is accelerated.

Until recently, open cracks were sealed superficially with various flexible sealants. This method of repair ignored the presence of problems deeper in the crack. As a consequence,

the repair method failed to stop the eventual corrosion of reinforcement.

To obtain a complete structural repair, it became necessary to develop a system using resins which were capable of being distributed uniformly throughout the whole crack and to full depth of the cracked element. Such resins require the following characteristics:

�� Mechanical properties superior to or equal to the concrete

�� Perfect adherence throughout the crack, even in damp or saturated conditions

�� Resistance to water and to thermal shock

�� Capability of use in extreme climatic conditions

SRG uses high strength epoxy resins that are injected into the cracks. The equipment used for injection is fully automatic. It guarantees the correct and thorough mixing of the resin components using individual pumps with component mixing in the injection headpiece.

Crack injection repairs

Crack repair technology has dramatically changed in

recent years providing superior protection and strength

compared to previous methods.

STRUCTURAL CRACK REPAIR

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Cathodic protection prevents corrosion from occurring by inhibiting the electrical process that causes the corrosion.

This can be achieved either by applying a low-level current to the structure or adding sacrificial anodes to it. The exciting recent development of chloride removal and realkanisation uses a similar impressed-current approach to restore a correct chemical balance to a deteriorated concrete.

Cathodic protection is a highly technical field and SRG has a successful track record on major government and infrastructure projects.

Typical cathodic protection services offered by SRG include:

�� Bridge protection

�� Jetty and wharf protection

�� Foundation protection

�� Carbonation correction (realkanisation)

�� Removal of chlorides (desalination)

Connection of titanium anodes

Cathodic protection systems use electrochemical

techniques to control the deterioration of steel or

concrete. Once limited to just protecting steelwork or

rebar, CP-based systems now exist to address the major

concrete problems of carbonation and chloride attack.

CATHODICPROTECTIONCATHODIC PROTECTION

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The specialised services available from SRG include:

�� Stay cable protection and testing

�� Ground anchor testing

�� Heavy lifting and load handling

�� Grout injection

�� Epoxy coating

�� Shotcreting

�� Surface grit / sandblasting

�� Water based cutting and demolition

�� Diamond cutting and coring

�� Pipe jacking and lining

�� Bridge bearing replacement

�� Ground engineering & stabilisation

�� In-house design engineering for all strengthening components / condition reports

SRG’s services division has the resources and skills available from our other divisions withing the group, including civil, building and mining as well as our technology partners.

The experience and expertise gained over the years throughout our diverse operations has enabled SRG to research, develop and implement practical, cost efficient repair solutions and techniques.

SRG are leaders in the field of ground anchors. In addition to design and installation, we also carry out inspection and investigation of anchors previously installed where problems may be occurring. This includes investigations for durability and load testing to ensure design assumptions are still being achieved.

As industry leaders, we have developed robust planning and management systems essential for large scale and complicated projects.

Replacement of bridge bearings

SRG has progressively developed its capacity to

undertake any manner of work for any sized project.

Whether scaling the heights of Sydney Tower,

reconfiguring Stadium Australia seating or verifying

the strength of Warragamba Dam, you can trust SRG

to perform professionally and at the highest level.

SPECIALISED SERVICES

ABOUTUS We are an Australian complex services company. We solve the challenging and difficult problems that others can’t. Our vision is to make the complex simple for our customers.

We have people working across Australia and the world bringing our unique blend of innovation, precision, technical excellence and safety to every mining and infrastructure project we touch.

Since 1961, we have worked on many of the iconic stadiums, skyscrapers, bridges, dams, structures and mining projects, both here in Australia, and overseas.

That’s because we’re not afraid to challenge what is considered possible.

SRGLIMITED.COM.AU

CALL 1300 775 477 +61 8 9267 5400

GET TO KNOW US AT SRGLIMITED.COM.AU

AUSTRALIA / AFRICA / MIDDLE EAST / ASIA PACIFIC / HONG KONG

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