Micro Concreting, often referred to as micro-concrete or micro mortar, is a specialized construction material and technique that has gained prominence in recent years for its remarkable properties and versatile applications in the field of construction and repair.
Microconreting is characterized by its finely tuned composition, exceptional durability, and remarkable adaptability, making it an invaluable asset in the construction industry. In this exploration, we delve into the fascinating world of microconstruction, examining its composition, applications, and the myriad benefits it brings to the world of modern construction and infrastructure development.
Repairing Works of RCC Slabs, Columns and Beams
All safety measures concerning the stability and integrity of the structure have to be in place before attempting any removal of the damaged concrete.
First, manually or mechanically chip and remove all damaged plaster and debonded concrete from the RCC column, beam, and slabs to expose the corroded reinforcement bars.
Thoroughly clean and inspect the reinforcing bars, verifying their cross-sections with the original steel cross-section for any deterioration. If you notice a significant reduction, add new reinforcements to the existing steel reinforcements before concreting.
Drill and fix the additional reinforcement bars in position using Lok-Fix or similar epoxy sealants.
After thoroughly cleaning the reinforcements, apply a suitable (preferably non-toxic) rust remover or rust converter. For example – Rebaklense RR, of M/s Fosroc Chemicals India Ltd or Amandur, manufactured by GK Technocom.
Some removers include a feature to prevent flash rusting which can occur to exposed bare metal.
After removing rust, thoroughly rinse and dry the item. Apply Nitozinc Primer over all exposed steel reinforcement rods. Then, use good-quality marine plywood for necessary watertight shuttering.
An epoxy bonding agent like Nitobond EP is applied to the old concrete surface. It is for bonding new cementitious materials to existing cementitious surfaces. Add the new concrete within 3 – 6 hours of applying the bonding agent, while it is still in a tacky state.
Using micro concreting materials like Renderoc RG, mix with 12mm down coarse aggregate and specified water using a power-operated stirrer.
Pour this mixture into the formwork to achieve an average thickness of 85 mm for the beam and column.
Plaster the repaired surface with Nitobond SBR, a polymer bonding agent, concrete modifier, to an average thickness of 20 mm. After which curing compound,
Apply CureCocure WB with a painting brush to achieve complete coverage of the micro concrete. You can also apply this curing compound immediately after de-shuttering for better results.
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