Applications of polymer concrete in corrosive environments
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Applications of polymer concrete in corrosive environments C. Lora 1, J. Ocampo 2, B. Valdez 1, M. Schorr1 1
Instituto de Ingeniería Universidad Autónoma de Baja California, Mexicali Blvd. Benito Juárez S/N, ex ejido Coahuila, C.P.21900, Mexicali, B.C. México. 2 Facultad de Ingeniería , Universidad Autónoma de Baja California, Mexicali Blvd. Benito Juárez S/N, ex ejido Coahuila, C.P.21900, Mexicali, B.C. México. ABSTRACT Concrete is a composite material, composed of cement, sand, gravel and water, reinforced with steel bars or mesh. It is used for the construction of infrastructure assets such as airports, dams, ports, bridges and road ways. Polymer concrete is a relative new material containing a thermosetting resin (instead of water) displaying improved mechanical strength, low permeability, greater corrosion resistance and higher durability. It is employed for new construction and old concrete reparation in the chemical, food, fertilizer, mine and civil industries. Polymer concrete pipe specimens, reinforced with glass-fibers were prepared and exposed in a salt spray (fog) chamber, operating with a NaCl solution, following ASTM standard B-117-11. The deterioration effects were assessed by testing the physical and mechanical properties, before and after the exposure in the spray chamber, in accordance with standard ASTM D3039-2013. Corrosion resistance was evaluated applying ASTM standard C876-2013. The result of this work are presented, illustrated and discussed.
THEORY Composite materials Technical terms Aggregate is a granular material, such as sand, gravel, or crushed stone. Polymer concrete is a composite material that consists essentially of a thermosetting resin within wich are embedded particles or fragments of aggregate. Polymer concrete pipe is a tubular product containing aggregate, embedded in or surrounded by cured thermosetting resin, wich may also contain granular or platelet fillers, thixotropic agents, pigments, or dyes Composite of fiber glass Fiberglass is a type of fiber reinforced plastic where the reinforcement fiber I specifically glass fiber. The glass fiber may be randomly arranged, flattened into a sheet or woven into fabric. The
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plastic matrix may be a thermosetting plastic most often epoxy, polyester resin. Worldwide volume production and consumption of fiber reinforced polymers (FRP) have increased in the last decades in several fields, mostly in the construction, automobile and aeronautic sector. The high strength to weight ratio, corrosion resistance and design flexibility make FRP based materials an interesting alternative to steel and other similar materials. Despite all the advantages of FRP baes products, the increasing production and consumption also drives to an increasing amount of FRP wastes, either as end-of-life products or as manufacturing reje
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