ACI 549.4R-2020 Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix and Steel-Reinforced Grout Systems for Repair and Strengthening of Concrete Structures

ACI 549.4R-2020 Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix and Steel-Reinforced Grout Systems for Repair and Strengthening of Concrete Structures. fabric-reinforced cementitious matrix composite – composite material consisting of a sequence of one or more layers of inorganic matrix reinforced with diy fibers in the form of open single or multiple fabric that, when adhered to concrete structural members, forms an FRCM system. fabric-reinforced cementitinus matrix composite configuration combination of all applicable parameters that affect the performance of FRCM. such as layers, thicknesses. components, and bonding agents. greige fabric unfinished fabric just off’ the loom or knitting machine. inorganic matrix inorganic hydraulic and nonhydraulic binder (mortar) that holds in place the structural reinforcement meshes in FRCM and SRG composite materials. If the mortar is polymer-modified, the maximum content of organic compounds (dry polymers) in the matrix is limited to 5 percent by weight of cement. mesh fabric (two-dimensional structure) or textile (twoor three-dimensional structure) with open structure; in an open structure, the yarns or strands do not come together. leaving interstices in the fabric or textile. pa.%she composite system composite system that is not pre- or post-tensioned. sizing organic compound applied to fibers during the fiber manufacturing process to provide enhanced fiber characteristics such as abrasion resistance. strand ordered assemblage of filaments of predetermined quantity based on the number of filaments per strand that have a high ratio of length to diameter, are normally used as a unit, and are bundled together to resist splitting or fi lamentation. steel-reinforced grout composite —composite material consisting of a sequence of one or more layers of inorganic matrix reinforced with high-strength steel wires in the form of open single or multiple textiles that, when adhered to concrete structural members, forms an SRG system. steel-reinforced grout composite configuration conibination of all applicable parameters that affect the perfomiance of SRG, such as layers, thicknesses, components, and bonding agents. structural reinforcement mesh open mesh of strands made of or steel wires or dry fibers, such as alkali-resistant glass, ararnid, basalt, carbon, and polyparaphenylene ben7o- hisoxa7ole, consisting of primary-direction and secondary- direction strands connected perpendicularly; polymeric coatings are typically applied to dry fibers to increase long- term durability of the mesh and ease of handling and installation; the typical strand spacing of primary-direction and secondary-direction strands is less than 0.75 in. (19 mm).ACI 549.4R pdf download.