Study on the effect of dispersed fiber reinforcement on some properties of concrete in corrosive environment

Abstract

ASTRACT:

In marine construction, concrete is one of the materials chosen by many material designers. However, concrete used in marine works has special requirements than ordinary concrete because it is subject to corrosive effects of corrosive elements contained in water and marine atmosphere. This paper presents a study on using some types of dispersed fiber reinforcement to improve the corrosion resistance of high - strength concrete M80 in the environment containing SO42-, Cl-. Types of reinforcement used include large size yarn and small size yarn. Large size yarns include: Dramix steel yarn RC-80/60-BN (length 60 mm), Mega Mesh polymer yarn MG-70/55 (length 55 mm); microfiber: polypropylene (PP) - based polymer fiber (length 18 mm). Small size fibers are used with a content of 0,2% and large fibers are used with a content of 0,4% by volume of concrete. The research results show that the fully dispersed fiber reinforcement is resistant to cracking, limiting the ability to widen the cracks for concrete, thereby improving the bearing strength and corrosion resistance of concrete when required working in corrosive conditions.

Keyword: Marine corrosion; fiber reinforced concrete; slump; compressive strength; flexural strength; fiber size.