I. Overview

Items

MgO Board Calcium Silicate Board Gypsum Board

Fire Resistance

A1 A1 B

Water Resistance

Excellent Excellent Bad

Physical Properties

Excellent Excellent Normal
Facing Material Compatibility Excellent Excellent

Bad

Construction Convenience Excellent Normal

Normal

Environmental Protection No toxic substances Asbestos contained

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Cost Normal cost High cost

Low cost

II. Fire Resistance

MgO Board Calcium Silicate Board Gypsum Board Details
Grade A1 Grade A1 Grade B

The MgO board and the calcium silicate board are both incombustible materials, while the gypsum board begins to carbonize at 200°C.

III. Water Resistance

MgO Board

Calcium Silicate Board Gypsum Board Details
Can be dried after soaking for 100 days, with little change in physical properties Can be dried after soaking for 30 days, with little change in physical properties Decompose with water and the strength decreases

The waterproof performance of MgO board and the calcium silicate board is basically the same. The gypsum and the kraft paper are not waterproof.

IV. Physical Properties

MgO Board Calcium Silicate Board Gypsum Board Details
Density 0.9—1.3 g/cm2 1.3—1.5 g/cm2 1.2—1.3 g/cm2

The glass fiber in MgO board is cloth-like, which has low density and high strength, so it is light and strong. Calcium silicate board has short fibers, which means it is strong only with high density.

Impact Strength

≥4.5KJ ≥3.5KJ

≤1KJ

The glass fiber in MgO board is cloth-like, which has more advantages in bending and impact resistance. The alkalic calcium silicate board will corrode the glass fiber and we can only use asbestos and pulp short fibers.

Bending Strength

≥20MPa ≥14MPa

≤9MPa

Thermal Conductivity

0.64W/m2(W/m2·k) 0.53W/m2(W/m2·k)

0.61W/m2(W/m2·k)

All three kinds of boards are inorganic, and there is no significant difference in terms of thermal conductivity and thermal expansion.
Thermal Expansion 2.6×10-7MM/C(MM/K) 7.5×10-7MM/C(MM/K)

6×10-7MM/C(MM/K)

V. Facing Material Compatibility

MgO Board

Calcium Silicate Board Gypsum Board Details
Able to paste paper, cloth, PVC, veneer, aluminum board, tile and other decorative materials Able to paste paper, PVC, veneer, aluminum board, tile and other decorative materials Cannot be painted, tiled and affixed directly

Gypsum board has kraft paper, and it is not fireproof or waterproof. The high-grade MgO board has high strength and good flatness and is suitable for deep processing.

VI. Construction Convenience

MgO Board

Calcium Silicate Board Gypsum Board Details
Pneumatic nails and screws can be used. Wallpaper cutter or saw blade can be used for cutting. Pneumatic nails cannot be used. Only saw blade can be used for cutting. Only screws can be used instead of pneumatic nails. Wallpaper cutter or saw blade can be used for cutting.

Calcium silicate board has high density and brittleness, which make it easy to collapse and only tapping screws can be used. The MgO board is strong and wear-resistant. Gun nails, iron nail and screws can be used.

VII. Environmental Protection

MgO Board

Calcium Silicate Board Gypsum Board Details
No toxic substances Asbestos-containing There is pulverization and no toxic substances

Calcium silicate board fibers contain asbestos, waste paper fibers, and pulp fibers. Asbestos boards are not environmentally friendly and have low prices. Pulp fiber board is environmentally friendly and the price is pretty high.

 

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