This code presents ideas for a initial evaluate that determines the "design foundation code" that's, if the development should be repaired in accordance with the ACI 318 model utilized in the unique layout, or if the fix must conform to the present ACI 318. The code presents principles for selecting energy of in-situ fabric, appearing structural research, designing upkeep for energy and sturdiness, requisites for balance and shoring of building, and inspection and trying out of maintenance. remark presents program information in addition to references for additional info.
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Extra resources for ACI 562M-13: Code Requirements for Evaluation, Repair, and Rehabilitation of Concrete Buildings and Commentary (Metric)
3 Adhesives used to bond existing concrete, repair materials, and repair reinforcement shall transfer required forces between elements. 3, and ASTM C1583. 4 The selection of adhesives used in repair shall consider load type and duration and the effect of exposure conditions on adhesive properties. 5R, ACI 503R, and ACI SP-165 (Swami and Gaul 1996) provide guidance for the selection of adhesives. 1 The licensed design professional shall consider the properties of repair materials and systems in designing repairs and in specifying repair materials and repair procedures.
Long, slender (high aspect ratio) repair areas also tend to result in cracking. The shape of the repair should be considered to reduce stress concentrations and possible cracking. ICRI No. 1R provides guidance for repair shapes. Methods to reduce cracking in concrete repairs include configuring to maximize right-angle geometry, avoiding reentrant corners, uniform depth of edge and uniform depth of substrate, surface preparation, and undercutting of reinforcement with no feather edge conditions.
Adhesive-based repair systems can be considered effective during a fire event if a fire protection system is used that maintains the temperature of the adhesive-based system below its critical temperature. 5 Supplemental fire protection to improve the fire rating of repaired systems shall be permitted. 5C Standard fire protection systems can be used to increase the fire rating of repaired systems. National codes and professional organizations list generic ratings for concrete structural members, giving the minimum thickness of concrete cover needed to protect the main steel reinforcement from fire effects (IBC 2012; NFPA 5000 2009; PCA 1985,1994).
ACI 562M-13: Code Requirements for Evaluation, Repair, and Rehabilitation of Concrete Buildings and Commentary (Metric) by ACI