Abrasive Blasting: |
a process for roughening, cleaning , or finishing a surface by propelling an abrasive at medium or high velocity against it. Methods include pressure cleaning, sandblasting, shot blasting, etc… |
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Acid Etching: |
application of acid to clean or alter a concrete surface; typically used when no alternative means of surface prep may be used to roughen a surface to accept a coating. |
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Anode: |
the electrode in electrolysis at which negative ions are discharged, positive ions are formed, or other oxidizing reactions occur. A sacrifical anode is placed and tied into the rebar to prolong the time the repair takes to deteriorate. |
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Backer Rod: |
A flexible, compressible rod placed in a joint to reduce the depth of sealant and improve its shape factor; it also serves to support the sealant against sagging and indentation. |
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Bead: |
A strip of applied sealant, glazing compound, or putty. |
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Bond breaker: |
A material used to prevent adhesion at a designated surface. Typically in joint sealant installations to prevent three way adhesion of the joint sealant which will result in a failure if there is any movement in that joint. |
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Cathodic Protection: |
A form of corrosion protection for reinforced concrete wherein a sacrificial metal is caused to corrode in preference to the reinforcement, thereby protecting the reinforcement from corrosion. |
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Caulk: |
To install or apply a sealant across or into joints, cracks, or crevices to prevent the passage of air or water. |
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Chain Drag: |
A nondestructive testing method in which the sounds from the chains dragged over a concrete surface are used to detect delaminations, dull or hollow sounds indicate delaminated areas. |
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Chipping: |
To remove all of the hardened concrete section with a chisel. Typically to expose deteriorated rebar to effect a concrete repair. |
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Cold Joint: |
An unplanned joint or discontinuity resulting from a delay in placement of sufficient time to preclude a union of the material in two successive lifts. |
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Corrosion: |
Degredation of concrete or steel reinforcement caused by electrochemical or chemical attack. Corrosion typically results in the appearance of a rust stain or spalling concrete. The extent of corrosion cannot usually be determined until the corrosion is exposed. |
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Delamination: |
A separation along a plane parallel to a surface as in the separation of a coating from a surface or the layers of a coating from each other, or in the case of a concrete slab, a horizontal splitting, cracking, or separation of a slab in a plane roughly parallel to, and generally near, the upper surface. |
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Deterioration: |
physical manifestation of failure of a material (e.g., cracking, delamination, flaking, pitting, scaling, spalling, staining) caused by service conditions or internal autogenous influences. Typically the condition that occurs in rebar embedded in concrete slabs causing the slab to split or spall. |
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Efflorescence: |
A deposit of white salts left on a surface when a solution containing the salt leaches from concrete or masonry then evaporates. This condition is commonly overlooked when painting a surface causing the paint the fail pre-maturely. |
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Elastomeric: |
Having the characteristics of an Elastomer. An Elastomeric coating typically is applied to the vertical surfaces of a building that is to be waterproofed. This coating is able to withstand a certain degree of movement bridging cracks and keeping the walls water tight. |
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Epoxy Injection: |
A method for sealing or repairing cracks in concrete by injecting epoxy adhesives. |
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Mil: |
A unit of measurement typically used in this industry for the thickness of coatings. Mil = .0001 in. (0.0254 mm). |
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Mildew: |
A superficial growth produced by fungi in the presence of moisture that causes surface discoloration and decomposition. |
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Strengthening: |
The process of restoring the capacity of weakened components or elements to their original design capacity or of increasing of components or elements of a concrete structure. |
