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    Posts by tonysaba

    FCS Anti-Graffiti Solutions

    June 5th, 2018 Posted by Blog, Epoxy Coating, Insights 0 thoughts on “FCS Anti-Graffiti Solutions”

    LATEST DEVELOPMENTS: The very latest in ANTI-GRAFFITI SOLUTIONS.

    IS THIS ART OR SOCIAL VANDALISM?

    Our local Council for the City of Ryde have recently acknowledged the problem of Graffiti Management:

    “Graffiti is a problem everywhere, and the City of Ryde is no exception. This anti-social pastime defaces both public and private property. In NSW, any graffiti on public or private property is a criminal offence unless permission is given by the owner. It is punishable by imprisonment, community service orders or fines of up to $2,200.”

    FCS Concrete Repairs now have the latest solution to the problem!

    FCS Concrete Repairs have rights to a very newly developed coating which enables Graffiti to be easily removed from its surface using a fully biodegradable product.

    The anti-graffiti coating is coloured or clear and can be applied to all surfaces including paint and most other coatings, timber, concrete, brickwork, manufactured surfaces and claddings, and natural materials such as sandstone, granite, marble etc.

    The clear version maintains the appearance of the existing surface, seals and provides protection and enables Graffiti to be completely removed without damage to the surface when any Graffiti attacks are reported.

    FCS Concrete Repairs provide the FULL SOLUTION from coating application to general maintenance and Graffiti removal.

    This is a great development for FCS Concrete Repairs and for the Community, and complements our current range of services in concrete repairs, protective coatings, crack injection and structural strengthening.

    The Strength of the Surface of the Concrete Substrate and of the Adhesive are Critical Factors in the Use of Carbon Fibre Reinforced Polymers

    April 9th, 2017 Posted by Uncategorized 0 thoughts on “The Strength of the Surface of the Concrete Substrate and of the Adhesive are Critical Factors in the Use of Carbon Fibre Reinforced Polymers”

    Carbon Fibres have been developed for the aerospace industry which needed a material which combined high strength, high stiffness and low weight. In recent years the Construction Industry have recognised the potential of this material to provide solutions for problems associated with the strengthening of deteriorating infrastructure.

    BONDING MATERIAL

    When CFRP is used externally to strengthen concrete elements in a buildings, bridges etc the bond between the CFRP and the concrete substrate is critical.
    The strength of the adhesive and the degree of stress at the interface determine whether the CFRP delaminates and failure occurs. The shear strength capacity of the substrate material is therefore a major parameter of the interface region behaviour.
    In testing, the failure surface was located at the top of the substrate concrete just below the bond adhesive whereas the bond product itself provided the highest pull-off strength values. (International Journal of Adhesion and Adhesives 6 January 2005)
    The concrete substrate therefore must be pull-off tested to ensure that shear-tension failure of the concrete cover is not a factor and the recommended high strength adhesive must be used.

    INSTALLATION

    1. Surface preparation by sand or water blasting to expose course and fine aggregate surfaces.
    2. Bond pull-off tests of the concrete substrate.
    3. Measure the levelness of the prepared surface with a straight edge.
    4. Levelling mortar should be used if necessary.
    5. The following high strength structural adhesive is recommended by Sika for their product, Sika®CarboDur®reinforcement:

    Sikadur®30 epoxy resin is used to bond the CFRP to the concrete substrate and has a high early strength and a high tensile and flexural strength.

    IMPORTANTLY surface preparation, levelling of the substrate and the quality of workmanship are critical elements in the application of CFRP structural strengthening.

    Airbus A350 XWB vs Boeing 787 Dreamliner

    February 15th, 2017 Posted by Carbon Fibre Reinforced Polymer, Insights 0 thoughts on “Airbus A350 XWB vs Boeing 787 Dreamliner”

    The Question: Which aircraft has the highest weight ratio for CFRP?

    The Airbus A350 XWB is built of 52% Carbon Fibre Reinforced Polymer (CFRP) including wing spars and fuselage components, overtaking the Boeing 787 Dreamliner, for the aircraft with the highest weight ratio for CFRP, which was held at 50%.

    This was one of the first commercial aircraft to have the wing spars made from composites.

    All Nippon Airways Boeing 787-8 Dreamliner JA801A OKJ in flight

    The Airbus A380 was one of the first commercial airliner to have a central wing box made of CFRP; it is the first to have a smoothly contoured wing cross section instead of the wings being partitioned span-wise into sections. This flowing, continuous cross section optimises aerodynamic efficiency. Moreover, the trailing edge along with the rear bulkhead, empennage and un-pressurized fuselage are made of CFRP.

    Specialist aircraft designer and manufacturer Scaled Composites have made extensive use of CFRP throughout their design range including the first private manned spacecraft Spaceship One. CFRP is widely used in micro air vehicles (MAVs) because of its high strength to weight ratio.

    SpaceX is using carbon fibre for the entire primary structure of their new super heavy-lift launch vehicle, the ITS launch vehicle—as well as the two very large spacecraft that will be launched by it, the Interplanetary Spaceship and the ITS tanker. This is a particular challenge for the large liquid oxygen tank structure due to design challenges of such dense carbon/oxygen contact for long periods of time.

    Ultralight aircraft (see SSDR) such as the E-Go, rely heavily on CFRP in order to meet the category weight compliance requirement of less than 115 kg (254 lb) without pilot or fuel.

    In civil engineering Retrofitting has become the increasingly dominant use of the material, and applications include increasing the load capacity of old structures (such as bridges) that were designed to tolerate far lower service loads than they are experiencing today, seismic retrofitting, and repair of damaged structures. Retrofitting is popular in many instances as the cost of replacing the deficient structure can greatly exceed its strengthening using CFRP.

    Applied to reinforced concrete structures for flexure, CFRP typically has a large impact on strength (doubling or more the strength of the section is not uncommon), but only a moderate increase in stiffness (perhaps a 10% increase). This is because the material used in this application is typically very strong (e.g., 3000 MPa ultimate tensile strength, more than 10 times mild steel) but not particularly stiff (150 to 250 GPa, a little less than steel, is typical). As a consequence, only small cross-sectional areas of the material are used. Small areas of very high strength but moderate stiffness material will significantly increase strength, but not stiffness.

    CFRP can also be applied to enhance shear strength of reinforced concrete by wrapping fabrics or fibers around the section to be strengthened. Wrapping around sections (such as bridge or building columns) can also enhance the ductility of the section, greatly increasing the resistance to collapse under earthquake loading. Such ‘seismic retrofit’ is the major application in earthquake-prone areas, since it is much more economic than alternative methods.

    CFRP is now widely used in sports equipment such as in squash, tennis and badminton racquets, sport kite spars, high quality arrow shafts, hockey sticks, fishing rods, surfboards and rowing shells. Amputee athletes such as Oscar Pistorius use carbon fiber blades for running. It is used as a shank plate in some basketball sneakers to keep the foot stable, usually running the length of the shoe just above the sole and left exposed in some areas, usually in the arch.
    Controversially, in 2006, cricket bats with a thin carbon-fiber layer on the back were introduced and used in competitive matches by high-profile players including Ricky Ponting and Michael Hussey. The carbon fiber was claimed merely to increase the durability of the bats but was banned from all first-class matches by the ICC in 2007.

    Source: Carbon Fiber Reinforced in Wikipedia
    The Question: Replace or Repair Australia’s Ageing Infrastructure?

    The Question: Replace or Repair Australia’s Ageing Infrastructure?

    January 17th, 2017 Posted by Insights 0 thoughts on “The Question: Replace or Repair Australia’s Ageing Infrastructure?”

    Many of Australia’s bridges, sewage and water systems, and other infrastructure are reaching the end of their serviceable lives and the choice for government is whether to replace or extend their lives. It has been reported that this applies to over 600 bridges in New South Wales alone (in the U.S.A. more than 60,000 steel bridges are structurally deficient) and our sewage system requires large sums of money to replace or carryout essential repairs. This is a worldwide problem and fortunately there are new materials and modern processes which can provide the answers.
    Carbon Fibre Reinforced Polymer materials are a prime example of these new materials.
    Carbon Fibre Reinforced Polymer materials can be used to strengthen structures and extend the useful life of both steel and reinforced concrete bridges and other infrastructure. Examples are:

    The recent successful repair of the historic Münchenstein Bridge which crosses the Birs river in Switzerland where two girders, the most critical elements against fatigue on the 45.2 metre steel bridge, were strengthened using carbon fibre reinforced polymer materials.

    Another example is the Arlington Memorial Bridge between Washington and Virginia where the original structural beams built in 1932 are crumbling and are to be repaired using Carbon Fibre Reinforced Polymer materials.

    Melbourne’s West Gate Bridge widening was made possible by cost effectively using Carbon Fibre Reinforced Polymer materials.

    Carbon Fibre Reinforced Polymer materials can be used successfully to repair and strengthen structural elements in buildings as well.

    Carbon fibres have a very high tensile strength and tensile elasticity similar to steel but the great advantage is the high strength to weight ratio. This makes carbon fibres potentially and practically a large cost saving material for both government and the private sectors alike.
    FCS Concrete Repairs are experienced in the use of Carbo Fibre Reinforced Polymer materials.

    Geopolymers can be described as “Materials for this Century”

    June 9th, 2016 Posted by Insights 0 thoughts on “Geopolymers can be described as “Materials for this Century””

    Geopolymers are finding application in many industries including automobile, aviation, civil engineering, concrete manufacture, building and repairing, ground stabilisation and many others. An interesting example in civil engineering is the Toowoomba, Brisbane West Wellcamp Airport, the greenest airport in the world, where 100,000 tonnes of Geopolymer concrete was used for taxiways, hangars, aprons, turning node, culverts, barriers, road works, sewer tanks, bridge, and panels for the terminal building. Watch this video produced for the Geopolymer Institute in 2015. Geopolymers are now well proven in many fields and applications, and are the building material of the future.

    Geopolymer cements and concretes for building and repairing infrastructure have very high early strength, their setting times can be entirely controlled, and they remain intact for a very long time without the need for repair.

    With Geopolymer foams substrates can be strengthened, voids can be filled, slabs can be lifted/jacked, and joints can be stabilised with a minimal of disruption to or loss of production.

    FCS Concrete Repairs are experienced in the use of such materials.

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