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Calcined Kaolin
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Ultra Calcined Kaolin
- Ultra white and ultra-fine calcined kaolin for coating industry
- Ultra white and ultra-fine calcined kaolin for paper industry
- Ultra white and ultra-fine calcined kaolin for wire and cable
- Ultra white and ultra-fine calcined kaolin for rubber industry
- Ultra white and ultra-fine calcined kaolin for crop protection
- Ultra white and ultra-fine calcined kaolin for plastic masterbatch
- Ultra white and ultra-fine calcined kaolin for agricultural film insulation agent
- Special Calcined Kaolin
- Modified Calcined Kaolin
- Common Calcined Kaolin
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Ultra Calcined Kaolin
- New Materials
- Metakaolin
- Superfine Nano Kaolin
- Hydrated kaolin products for Rubber
- Titanium Dioxide Slurry for Textile Coating
- Acrylic resin for coatings
- Calcined kaolin for Cement Industry
- Calcined kaolin products for ceramics
- Calcined kaolin products for Rubber
- Calcined kaolin products for engineering plastics
- Calcined kaolin products for wire and cable
- Calcined kaolin products for papermaking
- Calcined kaolin products for coatings
- Crop protectants
Tunnel fireproof coating
Product introduction
Tunnel fireproof coating is composed of porous thermal insulation materials and inorganic electrical insulation materials. The fireproof coating is non-toxic, incombustible, asbestos free, and has good physical properties such as light weight, fast drying, moisture resistance, freeze-thaw resistance, corrosion resistance, acid resistance, alkali resistance, heat insulation, aging resistance, etc. Spray on the surface of the arch and side walls inside the tunnel to provide fire and heat insulation protection, preventing the rapid heating of the reinforced concrete in the tunnel and reducing its strength during a fire, avoiding concrete explosion, damage to the lining steel bars, and loss of support capacity, leading to tunnel collapse.
Construction instructions
Substrate surface treatment:
Before construction, remove oil stains, loose dust, and floating slurry from the tunnel concrete surface, ensuring the surface is flat and moistened with water.
Base coat application method:
(1) Mix SH tunnel fireproof coating adhesive with SH tunnel fireproof coating in a 1:1 ratio (by weight), then add an appropriate amount of water and stir with a low-speed mixer for about 5 minutes.
(2) Apply the base coat mixture evenly using a spray gun, adjusting the thickness to 3-5mm, ensuring uniform coverage without exposing the substrate.
(3) After completing the base coat spraying, allow the base layer to cure and harden based on climatic conditions (typically 10-24 hours), before applying the topcoat.
Topcoat application method:
(1) The mix ratio for the topcoat is SH tunnel fireproof coating: water = 1:0.68 (by weight), stir for 5-8 minutes until it reaches a uniform thick paste consistency.
(2) Apply using mechanical spraying, with each layer no thicker than 10mm, achieving a total thickness of 25-27mm to meet fire resistance requirements, followed by manual smoothing. Allow approximately 24 hours between coats, adjusting the interval based on environmental temperature and humidity.
(3) Slurry storage time
The slurry should be used immediately after mixing. At room temperature, it should be used within 2 hours; in hot weather, this time is shorter. Prolonged storage can reduce bonding strength and other adverse effects.
Construction environment:
(1) Ambient temperature should be between 5-35°C, substrate temperature between 5-45°C, relative air humidity no more than 85%, with good air circulation and wind speed not exceeding 5 m/s. Like all cement slurries, it should not freeze before curing, as this affects strength.
(2) Curing time: After completing all construction, the physical and fire resistance test specimens should be cured for 28 days. Once the coating has hardened, various building paints can be applied.