ACI 549.6R-20 (IN-LB, SI) PDF Download

ACI 549.6R-20 (IN-LB, SI) is a guide that provides recommendations for the design and construction of externally bonded fabric-reinforced cementitious matrix (FRCM) and steel-reinforced grout (SRG) systems for the repair and strengthening of masonry structures.

These systems consist of a reinforcement in the form of open fabric bonded to the masonry surface using an inorganic matrix. The reinforcement for FRCM can be made of carbon, alkali-resistant glass, PBO, aramid, or basalt fibers, while SRG systems use steel cords arranged as a unidirectional fabric. The matrix can be based on cement, lime, or geopolymer.

FRCM and SRG systems offer an alternative to traditional strengthening techniques and can be used to increase loadbearing capacity, improve seismic capacity, counteract damage, limit crack opening, and strengthen weak areas. The guide is based on experimental research, analytical work, and field applications and provides design and evaluation recommendations according to American and European regulations and guidelines.