What are concrete repair mortars?

Concrete repair mortars are designed to repair and restore concrete defects and structural integrity to increase durability and extend the longevity of the structure. From corrosion control to cathodic prevention (CP), the ARDEX range of concrete repair mortars is designed to meet your needs.

What are concrete repair mortars?

Concrete repair mortars are designed to repair and restore concrete defects and structural integrity to increase durability and extend the longevity of the structure. From corrosion control to cathodic prevention (CP), the ARDEX range of concrete repair mortars is designed to meet your needs. From high build hand applied repair mortars to high performance pourable repair mortars, the ARDEX concrete repair range provides the solution to restore your concrete structure. See our range below to find your solution.

Specially formulated for use on eroded or cracked concrete floors, epoxy concrete repair mortars are used to provide new strength to damaged concrete and, in most cases, provide a permanent repair that is tough enough to withstand the heaviest use. The most common application of repair mortars is the repair of spalling caused by corrosion of reinforcement in concrete structures with chloride ingress. This is a major industry with large repair contracts underway around the world. Proprietary products containing cements, cement substitutes and plasticisers, as well as shrinkage compensating admixtures, are supplied pre-mixed.

A lightweight, polymer-modified concrete repair mortar suitable for use in large-scale construction and non-structural repairs of concrete, stone or brick substrates. A general purpose one-component mortar for the restoration of medium weight concrete that can be used as a topping, as well as being suitable for all types of patch repair. Ordinary Portland cement concrete is suitable for large volumes and non-aggressive exposure conditions. Over the years, concrete mixes have used Portland cement powder admixtures as an aggregate binding agent.

Alternatively, sprayed mortar produces a dense concrete and is suitable for a variety of applications. It is a versatile three-component epoxy-based lightweight repair mortar that is used for stone, mortar, plaster, wood and concrete and is suitable for use in vertical and overhead repair work. Hydrodemolition robots are now used on large-scale projects and are capable of rapidly removing large volumes of concrete in controlled areas. Structural repairs require carefully staged stripping and reapplication to ensure that the element has adequate structural capacity for the applied loads that are relevant during the works.

Photomicrograph showing a polymeric repair mortar applied to fire-damaged concrete, which was not returned to the uncracked substrate (plane polarised light, view 5.4 mm × 3.5 mm). It is a one-component cementitious repair mortar that has fast-setting properties suitable for most types of structural repair. However, as can be seen from the literature, as well as our own experience, there is still room for further development of the repair mortar. Furthermore, since the roughness of the concrete substrate affects the performance of most patch repair mortars, it becomes necessary to artificially increase its roughness (most often by sandblasting), regardless of the cleaning operation.

Epoxy-based mortars are used in very high strength applications and therefore have limited application in the concrete repair industry. Specimens repaired with alkali activated mortar with 1 day cure have a higher bond strength than specimens repaired with current commercial products after 28 days cure. The results show that the bond strength with the repair product R2 is clearly influenced by the surface treatment.

Riley Ryan
Riley Ryan

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