10.410.0502 Composite mortar repair | Small area (1 s.f. ±)

10.410.0502 Composite mortar repair | Small area (1 s.f. ±)

International Masonry Institute
This detail illustrates a composite mortar repair installed in an existing masonry unit (e.g. stone, terra cotta, cast stone, etc.) where a previous spall, multiple-cracks, or delamination existed. Composite mortar repairs are cementitious materials and fine aggregates (e.g. sand) blended with water. For composite mortar repairs to be durable and resilient it is important to take into consideration the following: Material properties of the repair mortar should match the original masonry unit receiving the repair, including strength, porosity/density, water absorption, and vapor permeability; Preparation of the repair area should include keyed perimeter edges, uniform depth, surface roughness, clean, and stainless steel supplemental anchorage; Installation of the composite mortar should include surface moisture content as required, base coat, initial and finish coats, finishing to match profile, and curing as required; Quality control should include repair mockups prior to start of work
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