Description
Structural repair mortar in a thin layer, one-component, based on cement, selected aggregates, silica fume and synthetic resins, which meets the requirements of class R3 of UNE-EN 1504-3
Preparation
Mixing proportions: 4 liters (white color) or 4,75 liters (gray color) of water per 25 kg bag. On concrete surfaces, remove weak, damaged and deteriorated concrete and, where necessary, sound concrete, by suitable mechanical means or high pressure water jet. On armor, surfaces must be prepared using abrasive blasting or high pressure water techniques. Although a primer is not normally required on a prepared surface with adequate roughness, a prior surface wetting is necessary. The surface should not be allowed to dry before applying the repair mortar. When an adhesion bridge is necessary, apply MonoTop-910 S or with the same product (MonoTop-412 S), make a grout and press on the support. In both cases, the subsequent application of the mortar must be done "fresh on fresh". Where a barrier coating on the reinforcement is required, apply two coats of MonoTop-910 S. to the entire perimeter of the reinforcement.
Use
Sealing of pores, on concrete or mortar support. Thin-film coating of vertical or horizontal structural elements in building and civil engineering. Regularization of concrete surfaces. Small thickness repairs: filling of cavities, gravel nests in concrete, etc. Edge repair work, reprofiling of joint lips, etc. Suitable for concrete repair work (Principle 3, method 3.1 and 3.3 of UNE-EN 1504-9). Repair of chipping and concrete damage in buildings, bridges, infrastructures and superstructures.
Application
2,02 kg of fresh mix per m2 and mm of thickness. Approximately 1,74 kg of SIKA MonoTop-620 per m2 and mm of thickness. It can be applied by traditional manual methods or by using wet spray equipment. When a bonding bridge is needed, make sure it is still fresh when the repair mortar is applied. When applied manually, press the mortar with a trowel strongly on the substrate. Protect freshly applied mortar from early dewatering with proper curing methods. Concrete must be free of dust, poorly bonded, surface contaminants, and materials that can reduce bond or prevent suction or wetting of repair materials. In steel reinforcement, remains of rust, mortar, dust, and other materials that may prevent adhesion or contribute to corrosion must be removed.
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