The Constructor

What is Oxicrete in Construction?

What is Oxicrete

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Oxicrete is an acid system applied to cement surfaces like dam structures, polymer-modified screeds, and mortars to oxidize them and provide a stone-like or rusty iron appearance.

The thickness of the coating ranges from 3-6 mm and provides a smooth matte finish. Oxicrete is an ideal option to transform old concrete surfaces. Also, it is a cheaper alternative to Corten steel.

Preferable Conditions for Application of Oxicrete

Surface Preparations

  1. The surface should be prepared using grinding or light vacuum-contained shot-blasting. Improper surface preparation may lead to loss of adhesion and failure of oxicrete coating.
  2. The tensile strength of a new concrete surface should be 1.5 MPa or more and free from any laitance, surface sealer, or curing membrane.
  3. Old concrete surfaces must be free from loose debris, dirt, oil, and grease deposits. Visual inspection should ensure the surface is properly cleaned and sound.

Placement ProcedureĀ 

  1. Apply oxicrete with a nominal thickness of 1 mm as a scratch coat and cure it for a maximum of 48 hours at a temperature of around 20 oC.Ā 
  2. If the maximum curing time is exceeded, the coat should be abraded, and another coat should be applied.
  3. Next, pour the oxicrete mix on the area and use a notched trowel to achieve the required coverage rate.Ā 
  4. The surface should be protected from dampness and condensation, and it is recommended to water the area for a minimum of four days.

Curing

The curing time of oxicrete varies based on the purpose of applications and ambient temperature. For instance, it requires seven days for a surface to become fully chemical resistant and be used for heavy-duty traffic.Ā 

However, it needs 12 hours for pedestrians, 24 hours for light-wheeled traffic, and 48 hours for medium-wheeled traffic.Ā 

Applications

  1. Oxicrete can be used for all shapes.
  2. It can be employed indoors and outdoors of residential and commercial buildings.
  3. Oxicrete is applied to stain concrete.
  4. It is a good option to renew old surfaces.
Figure-1: Indoor Use of Oxicrete
Figure-2: Use of Oxicrete for Decoration

Advantages

  1. Oxicrete is tough and has high resistance to damage.
  2. It can be applied easily.
  3. Oxicrete surfaces can be cleaned easily.
  4. The color of oxicrete surfaces does not fade over time.
  5. It has several tones.

FAQs

What is oxicrete?

Oxicrete is an acid system applied to cement surfaces like dams, polymer-modified screeds, and mortars to oxidize them and provide a stone or rusty iron appearance.

How thick is the oxicrete coat?

The thickness of the coating ranges from 3-6 mm and provides a smooth mat finish.

Why is oxicrete applied to various concrete surfaces?

Oxicrete is an ideal option to transform old concrete surfaces. Oxicrete is a cheaper alternative to Corten steel.

What is the ideal temperature for oxicrete placement?

Oxicrete is recommended to be placed at ambient, material, and substrate temperature of 15-30 oC.

Why is it important to prepare a surface before applying oxicrete?

Concrete surfaces should be prepared to prevent loss of adhesion and subsequent failure of oxicrete coating.

Read More:

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Carbon Concrete: advantages and applications

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