ABSTRACT
Abstract In many structures reinforcement is needed to control the size and distribution of surface cracks. Because of the excellent durability properties of glass fiber reinforced plastics (GFRP), this reinforcement can be placed close to the surface where it wil l be most effective. This is in particular the case in aggressive environments where reinforcement of GFRP is an interesting alternative to steel. Experiments made with GFRP are presented and comparisons are made with codes. Keyword: concrete, cover, crack, glass, fiber, reinforced, plastics
1 Introduction
One weakness with ordinary concrete is a low tensile strength in relation to the compressive strength. As a consequence, cracks are the rule rather than the exception in most major reinforced concrete structures. Such cracks can be formed relatively early, mostly as surface cracks, or be the consequence of ambient conditions and structural use. In any event, such cracks can appear unsightly or have a negative influence on the serviceability characteristics. In particular, cracks may reduce the durability of steel reinforcement significantly. For these reasons it is often necessary to limit the size and distribution of cracks.
