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Reinforced Concrete Framework Structure

Reinforced concrete is one of the most trusted modern building materials. Cement is 'artificial natural stone' obtained by blending concrete, sand, and aggregates with drinking water. Fresh concrete can be shaped into almost any shape, which can be an inherent benefits over other materials. Concrete become very popular after the invention of Portland concrete in 19th century. However, its limited stress resistance avoided its wide use within building development. To conquer this weakness, material bard are embedded in concrete to create a composite material called reinforced concrete. Improvements in the present day strengthened concrete design and building practice were pioneered by European engineers in the later 19th century. At the present time, reinforced concrete is extensively found in a multitude of engineering applications.

The worldwide use of strengthened concrete construction is due to the wide availability of reinforcing material as well as the concrete substances. Unlike metallic, concrete production will not require expensive production mills. Concrete construction, does, however, require a certain degree of technology, know-how, and workmanship, specifically in the field during construction. In some instances, single-family properties or simple low-rise domestic buildings are built without any executive assistance.

The intensive use of reinforced concrete development, especially in developing countries, is because of its relatively low cost in comparison to other materials such as material. The expense of development changes with the region and strongly depends upon the neighborhood practice. As an example, a device area of the residential building made with reinforced concrete costs about $100/m† in India, $250/m† in Turkey, and $500/m† in Italy.

With the immediate growth of urban population in both the developing and the industrialized countries, reinforced concrete has become a material of preference for residential construction. Unfortunately, in many cases there isn't the necessary degree of knowledge in design and structure. Design applications varies from single-family structures in countries like Colombia to high rises in China. Frequently, strengthened concrete construction is utilized in regions of high seismic risk.

Introduction

Steel reinforced cement is a particular type that has already established strong material rebar or materials added to it while damp, creating a very strong kind of concrete that can withstand just about anything when it has dried. As the result of using steel reinforced are so excellent for the strength of the building, modern building today use metallic reinforced concrete in the development process. With the addition of thin steel bars to cement can increase the power of the cement, making it easier to use in variety of software. Today, lots of the buildings located nations use strengthened concrete to make the buildings better and better able to in industrialized withstand the ravages of time and the elements. Reinforcing the cement that will be applied to the buildings add tensile strength to the concrete, which makes it much stronger and even more versatile that regular concrete, which helps prevent cracking and damage. Steel reinforced concrete can be utilized in a number of building applications, including floors, beams, supports, wall surfaces, and frames.

Steel reinforced cement is a cement in which metal reinforcement bars, plates or fibres have been incorporated to develop a material that could otherwise be delicate. If a materials with high strength in tension, such as material, is located in concrete, then your composite material, strengthened concrete, resists compression but also bending, and other direct tensile action. A reinforced concrete section where the cement resists the compression and material resists the strain can be made into nearly every shape and size for the engineering industry.

Reinforcing Steel

Before placing reinforcing metallic in forms, all form oiling should be completed. As stated prior, oil or other covering should not contact the reinforcing steel in the formwork. Oil on reinforcing bars reduces the relationship between the pubs and the concrete. Use a piece of burlap to clean the pubs of rust, scales, grease, mud or other overseas subject. A light film of rust or moderate film is not objectionable. Rebars must be tied along for the pubs tore main in a desired set up during pouring. Tying is also a means of keeping laps or splices set up. Laps allow connection stress to copy the load from one bar, first in to the cement and then in to the second club.

Advantages Behaviour

Materials

Concrete is an assortment of cement, natural stone aggregate, and small amount of water.

Cement hydrates from microscopic opaque crystal lattices encapsulating and locking the aggregate into a rigid composition.

Typical concrete mixes have low tensile durability.

Steel, is located in concrete, then it will not only resists compression but also bending, and other direct tensile actions.

Steel also made the bonding of the aggregate in a concrete better.

Physical characteristics of steel reinforced concrete:

The coefficient of thermal growth of concrete is similar to that of material, eliminating internal tensions due to distinctions in thermal enlargement or contraction.

When the concrete paste within the concrete hardens this conforms to the surface information on the metallic, permitting any stress to be transmitted efficiently between the different materials.

The alkaline chemical substance environment provided by calcium carbonate triggers a passivating film to form on the top of steel, making it much more protected to corrosion than it might be in neutral or acidic conditions.

Common Failure Methods of Metal Reinforced Concrete

Conventional steel strengthened cement can failed scheduled to inadequate power, leading to mechanised failure, or anticipated to a decrease in its sturdiness. Corrosion and freeze may ruin badly designed or designed reinforced concrete. When rebar corrodes, the oxidation products broaden and will flake, breaking the concrete and unbonding the rebar from the concrete.

Typical mechanisms leading to sturdiness problems are as below:

Mechanical failure

Steel reinforced cement may be looked at to get failed when significant splits occur. Cracking of the concrete section can't be prevented. However, the size and location of the splits can be limited and managed by reinforcement, placement of control joint parts, the curing technique and the mixture design of the concrete. Cracking defects makes it possible for moisture to penetrate and corrode the reinforcement. This is a serviceability inability in limit status design. Cracking is generally the consequence of an inadequate quantity of rebar, or rebar spaced at too great a distance. The cement then splits either under excessive loadings, or scheduled to internal effects such as early thermal shrinkage when it cures. Ultimate failure resulting in collapse can be triggered by crushing of the concrete matrix, when tensions exceed its strength by yielding of the rebar or by relationship failure between your cement and the rebar.

Carbonation

Carbonation or neutralisation, is a chemical type reaction between carbon dioxide in the air and calcium hydroxide and hydrated calcium silicate in the cement. This in the pores of Portland Cement Concrete is generally alkaline with a pH in the number of 12. 5 to 13. 5. This highly alkaline environment is one where the embedded material is passivated which is secured from corrosion. The skin tightening and in the air reacts with the alkaline in the cement and makes the pore water more acidic, thus cutting down the pH. Carbon dioxide will learn to carbonate the cement in the cement as soon as the object is made. This carbonation process begins at surface, then slowly move deeper and deeper into the concrete. If the thing is damaged, the carbon dioxide in the air will be better able to penetrate into the concrete. Carbonated concrete only becomes a durability problem when there is also sufficient moisture and air to cause electro-potential corrosion of the reinforcing metallic.

Chlorides

Chlorides, including sodium chloride, can promote the corrosion of inlayed steel rebar if within sufficient attention. So, only use fresh organic water or portable water for mixing up concrete. It was once common for calcium chloride to be use as an admixture to promote rapid set-up of the cement. It was also mistakenly presumed that it could prevent freezing.

Alkali Silica Reaction

This is a reaction of amorphous silica sometimes present in the aggregates with alkali, for example from the cement pore solution. The silica reacts with the alkali to form a silicate in the Alkali silica effect, this triggers localize swelling which causes cracking. The conditions are: aggregate comprising an alkaline reactive constituent, sufficiently option of alkali ions and sufficient wetness. This phenomenon known as concrete cancers. This effect occurs independently of the occurrence of rebar.

Conversion of High Alumina cement

Resistant to vulnerable acids and especially sulfates, this cement treatments quickly and gets to very high sturdiness and power. However, it can lose power with warmth or time, particularly when not properly treated.

Sulfates

Sulfates in the dirt or in groundwater, in sufficient focus, can behave with the Portland concrete in concrete causing the formation of expansive products which can lead to early inability of the framework.

Corrosion and Passivation of metal reinforcement

Exposed metal will corrode in moist atmospheres due to differences in the electric potential on the metal surface building anodic and cathodic sites.

Concrete as an environment

The environment provided by good quality cement to metallic reinforcement is one of high alkalinity due to the occurrence of the hydroxides of sodium, potassium and calcium mineral produced during the hydration reactions. The majority of surrounding concrete works as a physical barrier to many of the steel's aggressors. In this environment material is passive and any small breaks in its protecting oxide film are soon fixed. However, the alkalinity of its area are reduced, such as by neutralization are able to reach the metallic then severe corrosion of the reinforcement can occur. Therefore can lead to to staining of the cement by corrosion and spalling of the cover due to the increase in size from the conversion of flat iron to flat iron oxide.

Factors affecting corrosion rates of metallic in concrete

The permeability of the cement is important in determining the degree to which aggressive exterior substances can harm the steel. A thick concrete cover of low permeability is much more likely to prevent chloride ions from an exterior source from achieving the steel and creating depassivation.

Alternatives for the reinforcing phase

Where an sufficient depth of cover is difficult to attain due to design concerns or where intense environments are expected such such as marine constructions or bridge decks, additional safeguard may be needed for the embedded steel. This might take many and different forms and commercial curiosity about this field is strong. The metal reinforcement itself may be made more able to maintain its passivity by giving it with a protecting finish. In extreme circumstances, sound stainless steel can be utilized, although the recognized additional expense restricts its use in every however the most specific applications.

The ideal situation

There can be little uncertainty that the most effective way of protecting metal which is inserted in cement is to provide it with an satisfactory depth of cover by high power, low permeability concrete free from depassivating ions such as chlorides. However, in real life, concrete is laid by the build in all weathers and conditions, exposed to industrial atmospheres, de-icing salts and seawater.

The real situation

Contaminated materials and poor workmanship are hard to avoid completely but by understanding the often sophisticated chemical and electrochemical conditions that can is available it ought to be possible to build up ways of producing structures that will last long into the next century.

Deterioration mechanisms

The majority of reinforced concrete round the world performs adequately and provides few problems. A minority of structures have deteriorated credited to either the action of aggressive components from the external environment or incompatibility of the blend constituents. Problems can arise because of this of imperfect or inaccurate site investigation, poor design, badly specified cement, poor craftsmanship and a range of other factors.

Stages of deterioration

The mechanisms of deterioration are mainly chemico-physical in dynamics and happen in three discrete periods which can be initiation, propagation, and deterioration.

Modes of deterioration

Deterioration may occur due to lots of mechanisms on which a sizable body of books already exists. Included in these are:

Corrosion of reinforcement anticipated to chloride ions, carbonation and change in the rebar reinforcement.

Sulphate assault of concrete

Salt recrystallisation

Soft normal water or acid assault of concrete

Alkali aggregate reaction

Thermal incompatibility of concrete components

Shrinkage

Frost damage

Depth of cover

Inadequate cover is invariably associated with regions of high corrosion risk scheduled to both carbonation and chloride ingress. By surveying the surface of a composition with an electromagnetic covermeter and creating a cover contour plot, the high-risk areas can be easily recognized. A cover review of recently completed set ups would quickly identify likely problem areas and invite additional precautionary measures to be studied.

Cracked cover

It should be appreciated that reinforced cement is intrinsically a damaged materials because the steel stops the framework failing in anxiety however the brittle concrete splits to the depth of the reinforcement. Only those breaks above a critical width which intersect the steel are liable to assist the corrosion operations.

Cost Incurred

After a period of unprecedented growth in prices during 2004, early day for 2005 indicates that the constructional steel market faces higher stability in the year ahead. Regardless of the price boosts, demand for metallic in the united kingdom market continued to be at an extremely higher level in 2004. One of the main concerns for steel users was the option of material, however the year ended with more steel in the source string than there have been at the start.

Structural steel structure costs

The leading benchmark cost unit for structural steelwork is its unit cost per tonne which includes the metallic and the next elements:

Connection design, aspect drawing, fabrication, screening, treatment and delivery, offloading, erection

These are determined against the overall estimated tonnage for the building to generate an overall shape cost. Product costs per tonne can vary enormously as there are a mixture of factors that effect the entire cost. Good care should be studied in considering each project's characteristics in coming to a tonnage rate. This can be calculated either on the number of beams and column in a building or a weight per m†.

The relative costs of each element will change with respect to the mother nature of the project. The tonnage rate could be divided the following:

Materials 30%

Engineering 5%

Fabrication 35%

Priming 8%

Delivery 2%

Erection 20%

The costs believe that the structural steelwork contractor will provide their own crane for all the projects apart from office buildings, for which the main builder offers a tower crane. The early participation of structural steelwork fabricators is the most effective way to value engineer cost savings into steelwork shape. For instance, using more substantial and therefore more costly steel columns in a design could take away the need for stiffeners. The metallic may cost more but it is cheaper overall than spending money on labour to fabricate and weld stiffeners to the column. If this value is adopted early enough in the job across the complete framework design, significant cost savings may be accomplished.

The cost of a framework system alone shouldn't dictate the decision of body for a task. Rather it should be one among a number of conditions that should be considered when making the decision of frame materials. The recent goes up in reinforcement and metallic prices have increased structure costs however the difference between metal and concrete structure costs remains insignificant. A 50% upsurge in European steel prices during 2004 has still left many in the development industry looking at design solutions which may have a heavy reliance on metal. The impact of the metallic price goes up and discovered that the whole task charges for concrete framed structures are marginally less than for metallic framed complexes.

Foundation costs

The foundations typically represent approximately 3% of whole project initial cost. For the heaviest reinforced concrete alternatives, the foundations could be more expensive, but this signifies only a tiny cost and can be offset by using post-tensioned slabs, which are typically 15% lighter.

Cladding costs

The thinner the overall structural and services zone, the less the cladding costs. Given that cladding can represent up to 25% of the construction cost it is worth minimizing the cladding area. The minimum amount floor-to-floor height is almost always achieved with a concrete smooth slab and independent services area.

Partitions

Sealing and open fire stopping at partitions mind is simplest with even soffits. Significant personal savings of up to 10% of the partitions bundle can be produced compared to the equivalent dry coating deal abutting a profiled soffit with downstands. This may represent up to 4% of the framework cost.

Services co-ordination/ Unit installation/ Adoptability

The soffit of any concrete level slab provides a area for services distribution free from any downstand beams. This reduces coordination work for the design team and then the risk of errors. It permits versatility in design and allows coordination effort to be concentrated elsewhere. Services assembly is simplest below a set soffit. This allows maximum off site fabrication of services, higher quality of work and quicker set up. These advantages should be reflected in cost and value computations. Indeed, M&E contractors estimate yet another cost of horizontal services syndication below a profited slab of up to 15%. Washboard soffits also allowed greater future adaptability.

Fire protection

For concrete buildings fire protection is normally not needed as the materials has inherent fire resistance as high as four time. This take away the time, cost and individual trade required to attend the website for fire safeguard.

Vibration

The inherent mass of concrete means that concrete surfaces generally meet vibration requirements at no extra cost and with no extra stiffening. For additional stringent criteria, the excess cost to meet vibration conditions is small compared to other structural material.

Exposed soffit

A concrete framework has a higher thermal mass. By exposing the soffits this is utilized through cloth energy storage to reduce initial plant costs and ongoing functional costs. Furthermore, the price of suspended ceilings can be reduced or eliminated.

Conclusion

As a bottom line, nearly all reinforced concrete constructions show excellent sturdiness and perform well over their design life. Negative surroundings or poor construction practice can lead to corrosion of the reinforcing metallic in concrete. The major mechanisms for corrosion are atmospheric carbon dioxide ingress and chloride strike from cast-in or diffused chlorides. The corrosion and deterioration mechanisms are essentially the same for both carbonation and chloride harm. Proper selection of materials, enough cover to reinforcement, good quality concrete and attention to the surroundings during development will enhance the durability of reinforced concrete constructions. For cost incurred, concrete's range of inherent benefits including fabric energy storage, open fire resistance and audio assembly means that concrete properties generally have lower operating costs and lower maintenance requirements.

For structure put through aggressive surroundings, combinations of moisture, heat range and chlorides may cause the corrosion of reinforcing and prestressing material, resulting in the deterioration of concrete and loss of serviceability. One preferred solution which includes assumed the position of cutting-edge research in many industrialized countries, is the use of fiber reinforced polymer rebars in cement. Fiber concrete is also becoming an increasingly popular construction material because of its improved mechanised properties over non-reinforced concrete and its potential to improve the mechanised performance of conventionally strengthened concrete.

DEFINITION OF FIBRE REINFORCED POLYMER

Fibre-reinforced polymer (FRP), also called fibre-reinforced plastic material) are composite materials made of a polymer matrix reinforced with fibres. FRPs are generally used in the aerospace, motor vehicle, marine, and structure industries. FRPs are usually prepared in a laminate framework, in a way that each lamina (or flat layer) consists of an design of unidirectional fibres or woven fibre textiles embedded in just a thin coating of light polymer matrix material. The fibres, typically made up of carbon or wine glass, provide the strength and rigidity. The matrix, commonly made of polyester, Epoxy or Nylon, binds and helps to protect the fibers from harm, and transfers the stresses between fibers.

TYPES OF MATERIAL USED

Polymer

There are two main types of polymer used for resins: thermosets and thermoplastics. The thermosetting polymers found in the construction industry will be the polyesters and the epoxides. There are plenty of thermoplastic resins used in composite production: polyolefins, polyamides, vinylic polymers, polyacetals, polysulphones, polycarbonates, polyphenylenes and polyimides.

Fibre

A wide selection of amorphous and crystalline materials can be utilized as the fibre. In the construction industry the most frequent fibre used is goblet fibre (there are 4 types of cup fibre: E-glass, AR-glass, A-glass and high power wine glass). Carbon fibre, which there are 3 types (Type I, II, III) can be used separately or in conjunction with the glass fibre as a hybrid to raise the stiffness of a structural member or the region within a structure, so the stiffness exceeds the value possible only using goblet fibre. Aramid fibres can be utilized instead of wine glass fibres to give increased tightness to the composite. Today each of these fibers is used generally in industry for any applications that require plastics with specific strength or elastic qualities. Glass materials are the most frequent across all industries, although carbon fibre and carbon fibers aramid composites are extensively within aerospace, motor vehicle and wearing good applications.

Additives

For structural applications it is obligatory to achieve some extent of fire retardant. Fireplace retardants are usually designed in the resin itself or as an applied gel-coat. Fillers and pigments are also used in resins for a variety of purposes, the former principally to boost mechanised properties and the last mentioned for appearance and defensive action.

APPLICATIONS OF FRP IN CONSTRUCTION

There are three wide divisions into which applications of FRP in civil engineering can be classified: applications for new building, repair and rehabilitation applications, and architectural applications.

NEW CONSTRUCTION

FRPs have been used generally by civil engineers in the look of new structure. Constructions such as bridges and columns built completely out of FRP composites have demonstrated exceptional strength, and effective resistance to effects of environmental exposure. Pre-stressing tendons, reinforcing bars, grid reinforcement, and dowels are examples of the countless diverse applications of FRP in new set ups.

REPAIR AND REHABILITATION

One of the most common uses for FRP requires the repair and rehabilitation of damaged or deteriorating buildings. Several companies around the world are beginning to wrap destroyed bridge piers to prevent collapse and steel-reinforced columns to improve the structural integrity also to prevent buckling of the reinforcement.

ARCHITECTURAL

Architects have also discovered the many applications that FRP can be utilized. These include buildings such as siding/cladding, roof covering, floors and partitions.

DESIGN CONSIDERATION

The power properties of FRPs collectively constitute one of the primary known reasons for which civil engineers select them in the look of set ups. A material's power is governed by its ability to sustain a load without increased deformation or failing. When an FRP specimen is tested in axial stress, the applied drive per product cross-sectional area (stress) is proportional to the percentage of change in a specimen's period to its original length (strain). If the applied load is removed, FRP results to its original shape or length. In other words, FRP responds linear-elastically to axial stress.

FRP allows the alignment the glass fibres of thermoplastics to suite specific design programs. Specifying the orientation of reinforcing fibres can increase the strength and amount of resistance to deformation of the polymer. Cup reinforced polymers are strongest and most resistive to deforming makes when the polymers fibres are parallel to the power being exerted, and are weakest when the fibers are perpendicular.

Thus this ability is can be an gain or a restriction with respect to the context of use. Weak dots of perpendicular fibers can be utilized for natural hinges and associations, but can also lead to materials failure when production processes neglect to properly orient the fibers parallel to expected causes. When makes are exerted perpendicular to the orientation of materials, the durability and elasticity of the polymer is less than the matrix by themselves. In cast resin components made of glass strengthened polymers such as UP and EP, the orientation of fibres can be focused in two-dimensional and three-dimensional weaves. This means that when pushes are possibly perpendicular to 1 orientation, they are simply parallel to another orientation; this removes the potential for weak spots in the polymer.

COST

With the rising cost of nickel, FRP has become a very competitive material of construction. It is very competitive with acid brick or rubber-lined carbon metal and much less costly than alloy-clad carbon material. It is generally more expensive than resin-coated carbon material but has an extended service life generally in most applications. Because FRP will not require insulation, FRP ductwork is really less costly than resin-coated carbon material.

ADVANTAGES OF FRP

Composites offer the designer a blend of properties unavailable in traditional materials. You'll be able to introduce the fibres in the polymer matrix at highly stressed locations in a certain position, path and volume in order to obtain the maximum efficiency from the reinforcement, and then, within the same member to reduce the reinforcement to a minor amount at parts of low stress value.

FRP products are an inexpensive alternative to steel in lots of the harshest industrial conditions. The features of FRP products over other materials include:

Corrosion Resistant

Fibre Reinforced Polymer materials are made to operate in hostile environments. Little or no coating or treating required.

Low maintenance requirements

Designed and designed to last, amalgamated structural materials are virtually free of maintenance.

Impact resistant

Inherent overall flexibility allows products to resist impact and failure.

Non-conductive and Non metallic

FRP constructions provide additional basic safety by preventing sparks and potential electronic hazards.

Fire Retardant

FRP has a low flame multiply index when tested under ASTM E-84 and fulfills self extinguishing requirements of ASTM D-635.

High strength-to-weight ratio

The strong, but light weight option where heavy lifting or access is an issue.

Reduced installation time and cost

FRP products are easier and lighter to install. Normal 'hands tools' are being used to make changes. Therefore FRP offers greater efficiency in engineering compared with the more standard materials.

DISADVANTAGES OF FRP

Structural failure may appear in FRP materials when tensile causes extend the matrix more than the fibers, causing the materials to shear at the software between matrix and fibers, tensile forces close to the end of the materials go beyond the tolerances of the matrix, separating the materials from the matrix and tensile forces can also surpass the tolerances of the fibers causing the fibres themselves to fracture resulting in material inability.

A serious matter relating to the utilization of FRPs in civil applications is having less design rules and specifications. For nearly ten years now, analysts from Canada, Europe, and Japan have been collaborating their attempts in trust of growing such documents to provide information for engineers building FRP buildings.

FRP plastics are liable to many of the issues and concerns encircling plastic waste removal and recycling. Plastics present a particular obstacle in recycling operations because they are produced from polymers and monomers that often cannot be separated and returned to their virgin states, because of this not all plastics can be recycled for re-use, in simple fact some estimates state only 20% to 30% of plastics can be material recycled at all.

In addition, fibres themselves are difficult to eliminate from the matrix and preserve for re-use means FRP amplify these obstacles. FRP are inherently difficult to split up into bottom part a materials that is into dietary fiber and matrix, and the matrix into distinct usable clear plastic, polymers, and monomers. These are all concerns for environmentally prepared design today, but it must be observed that plastics often offer personal savings in energy and financial savings in comparison to other materials, also with the advent of new more environmentally friendly matrices such as bioplastics and UV-degradable plastics, FRP will likewise gain environmental sensitivity.

DIFFERENCES BETWEEN Classic STEEL REINFORCED CONCRETE AND FIBRE-REINFORCED POLYMER (FRP) CONCRETE

No.

Conventional Metal Reinforced Concrete

Fibre-Reinforced Polymer (FRP) Concrete

1

Definition:

Steel reinforced cement is a particular type that has already established strong material rebar put into it while wet, creating an extremely strong type of concrete that can withstand almost anything when it has dried.

Definition:

FRP cement is composite materials manufactured from a polymer matrix reinforced with fibres and typically prepared in a laminate structure, such that each lamina (or smooth layer) has an agreement of unidirectional fibres or woven fibre fabric embedded in a thin part of light polymer matrix material.

2

Corrosion of steel reinforcement:

Exposed steel will corrode in damp atmospheres anticipated to dissimilarities in the electric powered probable on the steel surface developing anodic and cathodic sites.

Corrosion Resistant:

Fibre Reinforced Polymer materials are designed to operate in hostile environments. Little or no coating or treating required.

3

Conductive and metallic:

Steel strengthened concrete constructions provide additional protection by preventing sparks and potential electronic hazards.

Non-conductive and Non metallic:

FRP constructions provide additional safeness by stopping sparks and potential electrical hazards.

4

Increase unit installation time and cost:

Steel strengthened concrete products are difficult and heavy to install. Bar twisting and bar cutting machine are used to make changes.

Reduced assembly time and cost:

FRP products are easier and lighter to set up. Normal 'hands tools' are used to make alterations.

5

Have many design rules and requirements of steel strengthened concrete in civil applications which needed as direction for engineers planning steel strengthened concrete set ups.

The lack of design rules and technical specs of FRP in civil applications which needed as guidance for engineers planning FRP buildings.

6

The high costs of repair and maintenance of set ups destroyed by corrosion and heavy use.

Fibre Reinforced Polymer (FRP) is a comparatively new category of composite material manufactured from fibres and resins and has proven productive and economical for the development and repair of new and deteriorating constructions in civil engineering.

7

Cost : Expensive (e. g. The material costs for the steel

reinforced bridge were $391, 649. 53)1

Cost : Cheap (e. g. The full total material costs for the FRP reinforced

bridge were $632, 718)1

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