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From page 9... ... A-1 A T T A C H M E N T A Recommended Construction Specifications The proposed Construction Specifications are the recommendations of NCHRP Project 1059B staff at Florida International University. These specifications have not been approved by NCHRP or any AASHTO committee or formally accepted for the AASHTO specifications. Read the entire page →
From page 10... ... 1 General This Specifications is intended for use in the construction of repair and retrofit of concrete structures using bonded fiberreinforced polymer (FRP) composites. Read the entire page →
From page 11... ... and FRP system to function as intended. An example is confinement of columns for seismic retrofit. Read the entire page →
From page 12... ... Fiber Fly -- Short filaments that break off dry fiber tows or yarns during handling and become air borne, classified as nuisance dust. Fiber Reinforced Polymer (FRP) Read the entire page →
From page 13... ... Micro-cracking -- Cracks formed in composites when stresses locally exceed the strength of the matrix. MSDS -- Material Safety Data Sheet. Read the entire page →
From page 14... ... Roving -- A number of yarns, strands, tows, or ends of fibers collected into a parallel bundle with little or no twist. Shelf Life -- The length of time a material, substance, product, or reagent can be stored under specified environmental conditions and continue to meet all applicable specifications or remain suitable for its intended function. Read the entire page →
From page 15... ... Witness Panel -- A small FRP panel, manufactured on site under conditions similar to the actual construction. The panel may be later tested to determine mechanical and physical properties to confirm the expected properties for the full FRP structure. Read the entire page →
From page 16... ... ICRI -- International Concrete Repair Institute No. 03730: Guide for Surface Preparation for the Repair of Deteriorated Concrete Resulting from Reinforcing Steel Corrosion. Read the entire page →
From page 17... ... identifying mechanical, physical and chemical properties of all components of the FRP system; application guide, including the installation and maintenance procedures; and time schedule for various steps in the repair process. The installation procedure must clearly identify the environmental and substrate conditions that may affect the application and curing of the FRP system. Read the entire page →
From page 18... ... 2) Certificate of completed training from Manufacturer/ Supplier for at least one field representative who will be present on site throughout the project. Read the entire page →
From page 19... ... 3.2.2 Material Safety Data Sheets The MSDS for all components of the FRP system shall be accessible to all at project site. Specific handling hazards and disposal instructions shall be specified in the MSDS. Read the entire page →
From page 20... ... in the repair area, its source shall be located and treated to the satisfaction of the Engineer prior to restoring the section. Upon removing defective concrete, and before restoring the section, the substrate shall be cleaned from any dust, laitance, grease, oil, curing compounds, impregnations, foreign particles, wax and other bond inhibiting materials, as per Section 4.4.6. Read the entire page →
From page 21... ... within solid concrete in the substrate shall be stabilized using epoxy injection methods, as specified in Section 4.4.3. If water leak through cracks or concrete joints is significant, water protection and a water conveyance and weep holes shall be provided before restoring the section. Read the entire page →
From page 22... ... 4.4.3 Crack Injection All cracks in the surface of concrete or the substrate wider than 0.01 in. Read the entire page →
From page 23... ... 4.4.6 Surface Cleaning Substrate concrete and finished surface of concrete shall be cleaned to the approval of the Engineer. Cleaning shall remove any dust, laitance, grease, oil, curing compounds, wax, impregnations, stains, paint coatings, surface lubricants, foreign particles, weathered layers or any other bond-inhibiting material. Read the entire page →
From page 24... ... employed to correct the conditions. Auxiliary heat source may be used in cold weather to raise the ambient and concrete surface temperatures to acceptable levels, as recommended by the manufacturer, but no more than the glass transition temperature (Tg) Read the entire page →
From page 25... ... putty, if used in the FRP system, shall be applied as soon as the primer becomes tack-free or until not-sticky to the fingers. The putty shall be applied within 7 days after primer application; otherwise, the primer coated surface shall be roughened with sandpaper or similar tool. Read the entire page →
From page 26... ... shall be determined based on the manufacturer's recommendation and the approval of the Engineer. Multiple plies can also be applied in several days. Read the entire page →
From page 27... ... installed. Thickness and viscosity of the adhesive layer shall be according to the manufacturer's recommendations. Read the entire page →
From page 28... ... 5.6 Application of Near-Surface Mounted FRP Systems Near-surface mounted (NSM) FRP system is an alternative to externally bonded FRP systems. Read the entire page →
From page 30... ... C6.3 Inspection for Fiber Orientation See Section C5.4.7 for an explanation of the importance of fiber alignment and straightness. C6.4 Inspection for Debonding The inspector may look for changes in color, debonding, peeling, blistering, cracking, crazing, deflections, indications of reinforcing-bar corrosion, and other anomalies. Read the entire page →
From page 31... ... C6.6 Inspection for Adhesion The sampling frequency depends on the size and complexity of the project. It is recommended that test locations be on flat surfaces and representative of the variations in the FRP system and the concrete substrate. Read the entire page →
From page 32... ... C7 Repair of Defective Work Defects in FRP systems [Kaiser and Karbhari 2001a&b] may include (1) Read the entire page →
From page 33... ... C7.3 Patching of Minor Defects Minor defects to the FRP system may include cracking, abrasion, blemishes, chips, and cuts. The FRP patches should have the same characteristics (e.g., thickness, fiber orientation, ply stacking, resin type, etc.) Read the entire page →
From page 34... ... • Furnishing and placing wet lay-up FRP system by the square meter (square foot) of each layer applied; • Furnishing and placing pre-cured FRP system by the square meter (square foot) Read the entire page →
From page 35... ... Yang, X., and Nanni, A Read the entire page →

From page 9...

... A-1 A T T A C H M E N T A Recommended Construction Specifications The proposed Construction Specifications are the recommendations of NCHRP Project 1059B staff at Florida International University. These specifications have not been approved by NCHRP or any AASHTO committee or formally accepted for the AASHTO specifications.