Description/Cause: Degraded mortar is defined as a solid cementitious mixture that has lost its structural integrity. The physical forms of degradation may be caused by abrasion from wind action, salt crystallization and freeze-thaw action. Chemical forms of deterioration are usually caused by reactions with soluble salts.
Damage Created by Condition: Cracks in brick or concrete walls can be a source water of seepage that create water problems that require repair.
Suggested Maintenance/Products Required: Depending on the type of crack, non-structural or structural, repair methods and material consisting of repointing the mortar joints, to use of hydraulic cement and epoxy-injection systems. After repairs, a protective coating as KARNAK #100, #220 or #920 Emulsion Damp proofing or KARNAK #83, #86, #88 #229 (Trowel Grade) may be used.
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