Title:
Innovation for Renovation
Author(s):
Garth J. Fallis
Publication:
Concrete International
Volume:
31
Issue:
4
Appears on pages(s):
62-64
Keywords:
composite; fiber; mesh; repair; strengthening
DOI:
Date:
4/1/2009
Abstract:
Recently, Ruredil introduced a fiber-reinforced cementitious matrix retrofit system consisting of a polyparaphenylene benzobisoxazole (PBO) fiber mesh (Ruredil X Mesh Gold) and a stabilized, inorganic, cementitious mortar matrix (Ruredil X Mesh M750) designed to connect the mesh to concrete and masonry substrates. The unique structure of the PBO fiber allows it to bond directly to the mortar, eliminating the need for an epoxy resin. This new type of composite material can match the mechanical performance but overcomes several of the deficiencies of carbon fiber and epoxy resin FRP systems, including low resistance to fire and ultraviolet rays, high toxicity, low vapor transmission, and limited shelf life.