Bonded repair and retrofit of concrete structures using FRP by Amir Mirmiran

By Amir Mirmiran

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Additional info for Bonded repair and retrofit of concrete structures using FRP composites: recommended construction specifications and process control manual, Nummer 514,Deel 1

Example text

Mixing resins shall be monitored to avoid fuming and inflammable vapors, fire hazards, or violent boiling. The contractor is responsible for ensuring that all components of the FRP system at all stages of work conform to the local, state, and federal environmental and worker’s safety laws and regulations. 1 Safety Hazards Consult Chapter 9 of ACI 503R-93 for additional information on safety hazards of epoxy. Ignition or fire in the proximity of epoxy resins could be hazardous. Appropriate references may be used for other types of resin such as vinyl esters.

Shoring shall not be removed until the FRP system has fully cured and gained its design strength, as recommended by the manufacturer and approved by the engineer. may be provided to either support the existing structure prior to repair or reduce the structure’s initial deflections prior to strengthening. Shoring may also be used to induce an initial camber in the system, thereby stressing the FRP system. 3 Equipment The contractor shall provide all necessary equipment in sufficient quantities and in clean operating conditions for continuous uninterrupted FRP installation.

Moisture level on all contact surfaces shall be less than 10% at the time of installation of the FRP system, as evaluated according to ACI 503R93. Moisture restrictions may be waived for resins that have been formulated for wet applications. 1 Environmental Conditions for Installation Moisture may hinder adhesion of the primer and resin. Work may be postponed if adverse weather, rain, or dew condensation is anticipated. 1. Moisture on fiber sheets can cause problems with wet-out and cure of the system.

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