Effectiveness of Nanotechnology-Based Waterproofing Compounds

Almost all materials commonly used for construction can be treated with these waterproofing compounds. This includes Concrete, Bricks, Sand Stone, Granite, Limestone, Marble, Plaster, Cement sheet, and Natural stones.

Nanotechnology-based compounds are generally monomeric compounds. The size of the molecule is less than 6-8 ηm. They can quickly enter into the pores of the substrates. Because of their small size, the molecules flow through the pore branches inside the substrate. They usually are applied as water solutions though another solvent may also be used as indicated by the manufacturer.

Such waterproofing compounds are found to be very efficient in covering the surface and provide deep penetration as below:

(a) They withstand hydraulic pressure generated by high wind-driven rains.
(b) They give protection against micro-cracks
(c) They also protect the structures from water damage after abrasion due to heavy traffic or natural weathering of the surface (d) Protects the reinforcement from corrosion.

Protection at the joints:

Joints are relatively small but essential and vulnerable components of structures. Joints are generally under more stress than the rest of the arrangements. Water penetrates quickly because of the joints components' porous nature due to the high concentration of reinforcement and difficult shuttering, including poor artistry. Water swells the joints, and it de-swells whenever water leaves the joints. The swelling and the de-swelling process generates void sand develops cracks. Waterproofing treatment of joints prevents water penetration into the joints, thus avoiding swelling and de-swelling process.

Protection of structures after the cracks are formed:

There are three methods of concrete: concrete that is broken and concrete that can be broken. If subjected to conditions of wetting and drying, concrete can expand and contract. If the stress associated with these volume changes exceeds the waterproofing services in Bangalore concrete's tensile capacity, cracks will form. Such damages are referred to as shrinkage cracks. Besides this, normal RCC is also designed to transfer tensile stresses to reinforcement bars as a cracked section.

Potential Cracks are also expected to develop in the common area as it acts as a "pressure release valve." At a junction, members of different thicknesses are joined together, for example, beam & slab junction where the slab of less thickness is bound to a beam. This allows a crack to form along a straight line within the joint since the thin section provides a path with less resistance than a thicker section. These micro-cracks usually are 0.1 to 0.2 mm in width and 2-3 mm deep. Nanotechnology-based hydrophobic waterproofing compound penetrates inside the concrete structures and protects them from water infiltration.

Prevention of the development of surface black spots on new structures:

The black spots are relics of organic growth (Mildew, Fungi). The concrete surface is very coarse and porous. Therefore concrete traps moisture in these pores and physical development occurs where moisture and food are available. Concrete and plaster surfaces retain water very effectively and promote fungus growth. These natural growths die and leave an organic residue (black spots). This residue becomes food for the next generation. These vicious cycles continue and cover the entire surface within few monsoon cycles.

These stains are generally removed by a high-pressure water jet and 3-5% solution of bleach (Sodium hypochlorite). First, the surface is cleaned by high-pressure water jets to loosen the residue. Then 3-5% Bleach solution is sprayed over the body. Allow 30-60 minutes to Oxidize the residue before cleaning again with the high-pressure water jet.

This biological growth can also be eliminated by removing one of the essential components, i.e., moisture. Nanotechnology-based waterproofing compounds change the surface characteristics from hydrophilic to hydrophobic, thereby preventing moisture accumulation in the pores. Hence formation and growth of fungus or mold are stopped for a more extended period.

Application of Nanotechnology-Based Waterproofing compounds

Preparation of surface:

The substrate should be made clean and dry. Loose dust, wax, sealers, curing agents, grease, and efflorescence should be free from the soil. Concrete should be fully cured for at least 28 days. Surface sealers must now be added on surfaces over 500F. The surface greenfly waterproof plywood price list in Bangalore should be dry, with no rain expected within 2 hours following application.

Vertical Surfaces:

  • Pressure washing (min. 1400 psi) followed by drying. Guideline on Waterproofing in New/Old Construction
  • Chemical cleaners may be used to remove and neutralize surface contamination.
  • Remove every sign of soil, efflorescence, bacteria, mildew, grease, tar, asphalt, mildew, soft compounds, stain, coatings, or any other contaminant on the floor.
  • Repair is all visible cracks greater than 1/32 of an inch.
  • Ensure all caulking or sealants have formed a plump skin before application of nanotechnology-based waterproofing compounds.

Horizontal Surface

  • Pressure washing (minimum 1400 psi) followed by drying or shot blasting before the application is suggested. Both areas to be sealed should be included in the planning, plus 10 cm of the vertical surface adjacent to the horizontal surface if necessary.
  • Chemical cleaners should be used to remove and neutralize surface contamination.
  • Remove every sign of soil, efflorescence, bacteria, mildew, grease, tar, asphalt, mildew, soft compounds, stain, coatings, or any other contaminant on the floor.
  • Repair is all visible cracks greater than 1/32 of an inch.

Ensure all caulking or sealants have formed a plump skin before application.

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