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vermiculite uesd in construction
Color | Golden, Silver |
Vermiculite Flakes | 0.3-1mm, 0.7-2mm, 1-2mm, 2-4mm, 4-8mm. |
Expanded Vermiculite | 0.3-1,1-2mm, 1-3mm, 2-4mm |
Horticulture Vermiculite | 1-2mm, 2-4mm, 1-4mm |
Note: The Size should be adjusted according to customer's demands.
Data for reference
Element | SiO2 | MgO | Al2O3 | Fe2O3 | CaO | K2O |
Content% | 37-43 | 11-23 | 9-17 | 5-18 | 1-2 | 5.5-7 |
Ph | Expansion Coefficient | Density |
8-11 | 5-9times | 120-300kg/m3 |
Properties
Expanded Vermiculite's Properties:Fireproof, heat insulating, sound and moisture absorbing, light weight, non-toxic, odorless, non-abrasive ect.
Vermiculite application in construction
1. Bitumen coated vermiculite plates
Vermiculite, coated with bitumen can be used as ideal lightweight plate for the roof. It has the advantage of low thermal conductivity (heat insulation), damp proof and easy storage etc.
2. Construction coatings
Vermiculite coating is a lightweight aggregate with a wide range of applications; the most important is to be used as protection for high buildings. Usually construction steel starts to crook at 550°C and this temperature in big fire will cause buildings collapse. Vermiculite can protect the constructional damage of steel caused by fire. Vermiculite-cement coating can not only prolong the time before collapse for residents to evacuate in time, but also prevent steel from damage to reduce the cost of replacement or removing.
3. Lightweight concretes
Vermiculite concretes are lightweight, have good insulating properties and are intrinsically fire resistant. Vermiculite concretes may be used in the roof and floor and in the fabrication of pre-cast products. Vermiculite concretes can also be used around back boilers and as a fire back support material.
4. Loose fill insulation
Loose fill vermiculite can be used between joists in lofts for home insulation. The free flowing properties of exfoliated vermiculite make installation very simple. The insulating properties of vermiculite significantly reduce the loss of heat in cold weather and keep the interior cool in hot weather. Because it is lightweight, it is used to modify the density of various architectural materials to enhance sound absorption properties in acoustical panels, ceiling tiles and textured ceilings.
5. Vermiculite plasters
Vermiculite plasters can be made with either gypsum or Portland cement. The advantage which all type of vermiculite plasters give over conventional plasters are: improved coverage; lighter weight; improved workability; excellent resistance; reduced thermal conductivity; improved adhesion to a wide range of backgrounds and increased resistance to cracking and shrinkage. Vermiculite plasters, whether gypsum or cement based, can be applied by hand or by spraying machine. Being a non-abrasive aggregate, vermiculite is well suited to spray application and the sprayed plasters can have an attractive decorative appearance.
6. Fireproof board
Vermiculite can be used to produce boards. High grade vermiculite essential can also be bonded with plastic plank to improve fire-resisting capacity. This application enjoys a wide popularity today.
