Soylev, TA | Ozturan, T

Conference Object | 2012 | 7TH ASIAN SYMPOSIUM ON POLYMERS IN CONCRETE , pp.737 - 744

Fibers do not provide significant increase in the strength of concrete at low fiber volumes commonly used in practice. The main benefits of fibers result from the control of the width of cracks in concrete. Polypropylene fiber is one of the most popular polymer fibers used in concrete, which has been shown to be effective in controlling the plastic shrinkage at the content of approximately 0.1% by volume. However, as polypropylene fibers are low modulus fibers and used at such low contents, it is difficult to expect an improvement in the crack control of hardened concrete in theory. In the present study, the effect of a multi-filame . . .nt polypropylene fiber on the resistance of concrete to surface scaling and freeze-thaw attack is investigated. Polypropylene fiber reinforced concrete was also tested under flexural load. Two different water/cement ratios were used for concrete production. The results indicated that polypropylene fibers can be beneficial in the control of micro-cracking induced by freeze-thaw cycling and surface scaling. The development of cracks under flexural load was not affected significantly by the presence of the polypropylene fibers Daha fazlası Daha az

Söylev, T.A. | Özturan, T.

Article | 2014 | Construction and Building Materials73 , pp.67 - 75

Steel, polypropylene, and glass fiber concretes at low-volume fractions, which have been successfully used for crack control in many structural applications, were tested for different properties including water absorption, electrical resistivity, sorptivity, depth of chloride penetration, chloride profiles, rebar corrosion half-cell potential, and corrosion current density. Compressive strength and splitting tensile strength, flexural strength, and fracture toughness were also determined. Two different water-cement ratios and two curing types were used in the study. Fibers caused physical changes in concrete, which were reflected to . . . the tested properties. The effect on durability was more significant in longer-term tests like corrosion. Moist curing was found to be more effective in fiber concrete for mechanical properties. © 2014 Elsevier Ltd. All rights reserved Daha fazlası Daha az