Concrete repair mortars are designed to restore and repair concrete defects and structural integrity, increasing durability and extending the life of the structure. ARDEX offers a range of concrete repair mortars to meet your needs, from high build hand applied repair mortars to high performance pourable repair mortars. Epoxy concrete repair mortars are specially formulated for use on eroded or cracked concrete floors, providing new strength to damaged concrete and often providing a permanent repair that can withstand heavy use. These mortars are commonly used to repair spalling caused by corrosion of reinforcement in concrete structures with chloride ingress.
Lightweight, polymer-modified concrete repair mortars are suitable for large-scale construction and non-structural repairs of concrete, stone or brick substrates. A general purpose one-component mortar is used for the restoration of medium weight concrete, as a topping, and for all types of patch repairs. Portland cement powder admixtures are used as an aggregate binding agent in ordinary Portland cement concrete. Sprayed mortar produces a dense concrete, and is suitable for a variety of applications.
It is a three-component epoxy-based lightweight repair mortar used for stone, mortar, plaster, wood and concrete, suitable for vertical and overhead repairs. Hydrodemolition robots are now used on large-scale projects to rapidly remove large volumes of concrete. Structural repairs require careful stripping and reapplication to ensure the element has adequate structural capacity for the applied loads. Photomicrographs show polymeric repair mortars applied to fire-damaged concrete, which was not returned to the uncracked substrate.
A one-component cementitious repair mortar with fast-setting properties is suitable for most types of structural repairs. However, roughness of the concrete substrate affects the performance of most patch repair mortars, so it is necessary to artificially increase its roughness (most often by sandblasting). Epoxy-based mortars are used in very high strength applications and have limited application in the concrete repair industry. Alkali activated mortar with 1 day cure has higher bond strength than current commercial products after 28 days cure.
The results show that bond strength with the repair product R2 is influenced by surface treatment.