Epoxy resins civil

Durig, J., et al., High Performance Flexible Epoxy System for Civil Engineering, Paper presented at the SPI-Epoxy Resin Formulators Meeting, San Francisco, February 20-22, 1991. 

Epoxy resins are superior in heat resistance, adhesion, corrosion resistance and also mechanical properties among thermosetting resins and are widely used for coatings, adhesives, electric insulating materials and matrices for FRP in areas such as aircrafts, electronics, electric power, and building and civil engineering. 

Epoxy systems are widely used in building and civil engineering applications and occupy a dominant position compared with other polymers. The major characteristics of epoxy resin systems provide an excellent combination of properties, including ... 

Another development has been reported by P.A. Lucas, W.E. Stamer and S.G. Musselman of Air Products and Chemicals Inc. (Lucas et al., 1994). An acrylate functional urethane flexibiliser has been used to modify epoxy resin, which optimises reactivity and is more compatible with epoxy. Urethane-acrylate flexibiliser offers very tough hybrid epoxy systems meeting the more demanding requirements of civil engineering applications. 

DJLH. [Dow] Al sttic polyamines curing agent for epoxy resins used for civil engineering, adhesives, grouts, casting and elec. enctq>sulation. 

DJE.R. n>ow] Epoxy resins for adhesive, civil engineering, casting, potting, encapsulation, filament winding, powd. coatings, and wet lay-up tq>plics. 

Epoxy resin cements have been used to seal leaking metal gas plpesil and for many civil engineering applications, such as steel wire-reinforced epoxy resin cements— and the reconstruction of the Abu-Simbul Temple in Egypt.— Epoxy resin cements whose physical properties are similar to those of concrete— are discussed more completely in Chapters 3, 4 and 5. 

Epoxy resins are generally not used alone but require a reaction partner in order to be cured (hardened). A large number of reaction partners may be used for curing at elevated or at room temperature. The cured films have high adhesion, flexibility, hardness, abrasion resistance, resistance to chemicals, and corrosion protection. In 1995 ca. 700000 t of epoxy resins were used worldwide by the coating industry (including civil engineering applications). 

Chem. Descrip. Neodecanoic acid glycidyl ester CAS 26761-45-5 EINECS/ELINCS 247-979-2 Uses Intermediate for mfg. of resins and polymers, chem. synthesis reactive diluent for epoxy resins for use in solv.-free coatings, civil engineering prods., e.g., floorings, concrete repair compds. 

Properties APFIA < 125 liq. sp.gr. 1.14 dens. 9.5 Ib/gal vise. 850-2800 cps EEW 185-206 flash pf. 191 C 100% NV D.E.R. 330 [Dow/Epoxy Prods. Infermeds.j Chem. Descrip. BisphenoFA epoxy resin Uses Epoxy for coatings, poffing, adhesives, laminafes, filamenf winding, civil engineering applies. 

Chem. Descrip. Bisphenol A epoxy resin Uses Epoxy for adhesives, flooring, encapsulants, 100% solids coatings, composites, civil engineering... 

MacKenzie, G.K. A study of freshly mixed epoxy resin adhesives for civil engineering, MSc thesis. University of Dundee, November 1986. 

Epoxy resin, as an adhesive, is nsed for many applications in building/construction, (i.e., it is possible to bond a new rebar to existing steel in concrete instead of welding it, by use of special epoxy adhesives). Epoxy can bond to almost any material (for strnctural or non-structural bonding) with high adhesive strength in various environments and temperatures. In civil engineering applications, epoxy adhesives are used to bond concrete in a number of different ways. Epoxy can be used to bond plastic concrete (or wet concrete) to cured concrete, it can be used to bond cured concrete to cured concrete, or cured concrete to cracked concrete, as well as to bond cured concrete to other materials with similar or dissimilar thermal expansion coefficients and elastic moduli. 

Epoxy resins show better properties than those of polyester resins, for instance, good ultimate elongation, which is an extremely important factor for the mechanical properties of composites. On the other hand, they are more expensive and more complicated to be applied when compared to polyester. These are the reasons why epoxy resins are mainly used in technology-based fields such as aeronautics, aerospace, and sport. The high mechanical and bonding properties make epoxy resins the most commonly used resins for civil engineering applications. 

Recent developments in the construction and civil engineering industry include the development of intelligent concrete with self-healing capability in Japan (249). Some of the systems are based on epoxy resins encapsulated in concrete which when triggered by cracks open and cure to repair the concrete. 

The use of high-performance epoxy resin systems in the civil engineering field has greatly increased since 1960. Nowadays these thermosetting polymers are widely used in this field as matrices for fiber-reinforced materials. In particular, their principal applications are in the following fields ... 

For these reasons, nowadays epoxy resins find application in several fields, e.g. coatings, electrical and electronic insulation, adhesives and construction, and as matrices for FRP in automotive, nautical, aerospace and civil applications. 

Commercially available pultruded bars are made of glass, carbon or aramid fibres, oriented in the axial direction and embedded in a polymeric matrix, usually made of vinylester or epoxy resin. The FRP bars most often used in civil engineering applications combine vinylester and glass fibres. 

Elastomer-modified epoxy resins have grown in use in the past 20 years in several apphcation areas connected with structural adhesives, composites, civil engineering/construction, electrical laminates/encapsulants, and corrosion resistance. Some of this increased use has come about through the utihty of telechelic butadiene—acrylonitrile Uquid polymers. 

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