Análisis comparativo entre el concreto hidráulico simple y el reforzado con fibras de acero

Abstract

Mechanical properties (module of rupture, resistance flexure, toughness, resistance compressive and module of elasticity) and durability properties (resistance to corrosion) on steel fiber reinforced concrete (SFRC) and plain concrete were compared. In adition, the best rate of steel fibers added to concrete was obtained, using admixtures and agregates tipicaly used in Chihuahua City, Mexico. Fresh SFRC was tested for workability and consistency (slump), and volumetric weight. In order to determine toughness of SFRC were used three methods (ASTM C 1018, JSCE SF4 and PCS). The acelerate of corrosion tests were carried out by cabinets of salt spray (fog), relative humidity, immersion in water, and environmental exposition. Steel fibers had good behavior with corrosive agents, although they did not have any coating or anticorrosive treatment. The best rate of fibers in SFRC, according to toughness, durability and fresh concrete performance was 30 kg/m3 of concrete, since toughness was the maximum obtained