Congratulations on Gemtree becoming comprehensive fire-rated board supplier for Modular Integrated Construction (MIC) .
Dimension Tolerance
Physical performances
Fibreglass
mesh makes Gemtreeboard fantastic in impact strength and bending
strength. Calcium silicate board can only use paper fiber or asbestos
for reinforcement because it can corrode fiberglass.All three types of
boards are inorganic and there is no much difference in thermal
conductivity and expansion.
Good
Physical tolerance
Excellent
Normal
Gemtreeboard
and high density calcium silicate are good in water resistance. The
fiber in low density calcium silicate board absorbs water which degrades
its strength. Plaster has no property of water resistance.
Density
1—1.5 t/m
3
0.9—1.3 t/m
3
1.2—1.3 t/m
3
Gypsum
board is not worthy of making deep processing because of its non-water
resistance. High density calcium silicate board is heavy but low
density calcium silicate board is easily deformed. Gemtreeboard is more
valuable for deep processing because of its flatness and high strength.
Evaluation
Fixing & Cutting
Pneumatic nailing or utility knife is not possible.
Can use nail, screws and pneumatic nailing . Can use utility knife or saw for cuttings.
Bad
Excellent
Pneumatic nailing is not possible.
Normal
Gemtreeboard
is manufactured at room temperature making this a low carbon
process.Heat, steam and pressure are used in the manufacture of calcium
silicate boards.
Low density board offers a nutrient to mold or fungus.
Combat the growth of mold and mildew.
Normal
Good
A nutrient to mold or fungus.
Bad
Evaluation
Strength
Gemtreeboard
is reinforced by fiberglass mesh and can be high strength but light
weight. Calcium silicate board is reinforced by short fiber and must be
high density to be strong.
≥2 KJ
≥7 MPa
≥8 KJ
≥ 1 KJ
Impact strength
Calcium
silicate board is high dense and easy to break and self-tapping screw
is a must. Gemtreeboard can use nail, screws and nail gun.
Termite resistance
Mold/fungus Resistance
Production process
High energy consumption
Low energy consumption
High energy consumption
Price
Environmental
Constructability
Diversities
Water-resistance performance
Evaluation
Data
Low density calcium board will deform when in water or wet.
Physically stable if dried after 100 days' in water.
Good
Excellent
Not water resistant and deteriorate if exposing to water.
Bad
Gypsum board begins charring at temperature 200℃.
The data of Gemtreeboard is based on its standard mgo board and not those of low quality mgo boards flooded the market.
Low density calcium silicate board is easily deformed,whilst high density one is brittle.
Fiberglass mesh balanced laying inside makes the board keeping its flatness all the time.
0.53 W/m
(W/m
·k)
2
2
0.64 W/m
(W/m
·k)
2
2
Plaster has no strength and is only reinforced by paper fiber. Easy to crack.
0.61 W/m
(W/m
·k)
2
2
Evaluation
Data
Sustanability of Gemtreeboard in comparison with Other Panel Materials
Can be laminated with wallpaper, cloth, PVC、veneer aluminum and tiling.
Can be laminated with wallpaper, cloth, PVC、veneer aluminum and tiling.
Good
Excellent
Fire-proof performance
Cannot be painted, laminated or tiling.
Bad
The properties in above table differs from different thicknesses or fibre contents.
MM/C(MM/K)
7.5×10
-7
MM/C(MM/K)
2.6×10
-7
Thermal conductivity
Distortion resistance
MM/C(MM/K)
6×10
-7
Low density calcium silicate board refers to density 0.9-1.1 t/m
Evaluation
Data
Evaluation
Data
Non-combustible A1 Grade
Non-combustible A1 Grade
Good
Good
≥20 MPa
High cost if reinforced by paper fiber.
Bad
Excellent
Cost effective
Non-combustible B Grade
Bad
≥4 MPa
Good
Low cost
Coefficient of thermal expansion
Data
Evaluation
Bending strength
Calcium Silicate
Gemtreeboard
Good
Physical tolerance
Good
Gypsum
Physical tolerance
Good
and high density 1.2-1.5 t/m
Comparison
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