Title:
Acceptance Criteria for Concrete and Masonry Strengthening Using Fabric-Reinforced Cementitious Matrix (FRCM) and Steel Reinforced Grout (SRG) Composites
Author(s):
Mahmut Ekenel, Francisco De Caso y Basalo, Antonio Nanni
Publication:
Symposium Paper
Volume:
324
Issue:
Appears on pages(s):
4.1-4.6
Keywords:
Fiber-reinforced cementitious matrix, steel reinforced grout, building codes, concrete and masonry strengthening, composite materials
DOI:
10.14359/51702356
Date:
4/1/2018
Abstract:
Repair and strengthening of concrete and masonry structures using fabric-reinforced cementitious matrix (FRCM) and streel-reinforced grout (SRG) are emerging technologies in the industry allowing engineers and contractors to effectively remove deficiencies, improve structural performance and prolong life of existing concrete
or masonry structures. FRCM is a composite consisting of one or more layers of cement- or hydraulic-based matrix reinforced with dry fibers in the form of open fabric. Similarly, SRG consists of a matrix reinforced with cords of twisted micro steel wires woven to form a fabric (mesh). Acceptance Criteria AC434 was published to provide guidelines for the evaluation of FRCM/SRG strengthening of concrete and masonry structural elements because the building codes in the USA do not have requirements for testing and determination of structural capacity, reliability and serviceability of this class of composite technologies. AC434 establishes requirements for testing and calculations that can lead to the issuance of a product research reports as evidence of a product’s building code compliance. This paper summarizes and presents the key features of AC434 and its relationship to ACI committee 549.4R, the guide to design and construction of externally bonded FRCM and SRG systems for repair and strengthening concrete and masonry structures.
Related References:
ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI318-11) and Commentary,” ACI 318-11, American Concrete Institute, Farmington Hills, MI, 2011.
ACI Committee 440, “Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures,” ACI 440.2R-08, American Concrete Institute, Farmington Hills, MI, 2008.
ACI Committee 440, “Guide for the Design and Construction of Externally Bonded Fiber-Reinforced Polymer Systems for Strengthening Unreinforced Masonry Structures,” ACI 440.7R-10, American Concrete Institute, Farmington Hills, MI, 2010
ACI Committee 549, “Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix (FRCM) Systems for Repair and Strengthening Concrete and Masonry Structures,” ACI 549-.4R-13, American Concrete Institute, Farmington Hills, MI, 2013
AC434, “ICC-ES Acceptance Criteria for Masonry and Concrete Strengthening Using Fiber-reinforced Cementitious Matrix (FRCM) and Steel Reinforced Grout (SRG) Composite Systems,” AC434, ICC Evaluation Services, Inc., Los Angeles, CA, June 2016.
ASTM Standards, American Society for Testing and Materials, West Conshohocken, PA, USA, www.astm.org. International Code Council, “International Building Code,” International Code Council, Country Club Hills, IL, 2015 edition.
International Code Council, “International Existing Building Code,” International Code Council, Country Club Hills, IL, 2015 edition.
ISO/IEC 17065, 2012, “Conformity assessment -- Requirements for bodies certifying products, processes and services” International Organization for Standardization, Geneva, Switzerland.