A Brief Discussion on the Performance Characteristics of Fiber Cement Boards

Today, let's talk about some characteristics of the Fiber Cement Boards.

(1) Air hardness: Common cementitious materials, represented by ordinary cement, are all hydraulic, meaning they can harden in water. However, ice and fire boards are completely different from regular cement. It is impermeable and won't harden in water. This is a prominent feature of magnesium cement compared with conventional cement.

(2) Multi-component: The ice and fire board is multi-component. Even if the light-burned magnesium powder is mixed with water alone, it will not become compacted. One of its components is light-burned magnesium powder or dolomite powder, and the other is magnesium salt as a modifier. The other components include water and modifiers.

(3) High heat release: During hardening, the ice-fire plate releases a high amount of heat. Its heat release is 1 to 13.5KJ/g, and the core temperature of the high-reaction system can reach 140℃, which may exceed 150℃ in summer. The heat of hydration of ordinary cement is only 300 to 400J/g, while that of magnesia cement is 3 to 4 times that of ordinary cement.

(4) High strength: The compressive strength of ice and fire boards can easily reach 62.5MPa. Generally, the compressive strength of light-burned magnesium powder cementitious materials can exceed 62.5MPa, and most can reach over 90MPa. Under the condition of ensuring the quality of light-burned magnesium powder, the proportion of magnesium cement is reasonable and the process is scientific, which can reach about 140MPa.

(5) Resistance to high and low temperatures: Among various inorganic cementitious materials, only ice and fire boards possess resistance to both high and low temperatures. Ice skin generally has the characteristic of high-temperature resistance. Even if it is compounded with glass fiber, it can withstand fire above 300℃. Magnesium cement is widely used in the production of fireproof boards due to its fire resistance.

(6) Lightweight and low density: The density of ice and fire boards is generally only 70% of that of ordinary silicate products, and the density of their products is usually 1600 to 1800kg/m ³. Cement products generally have a density of 2400 to 2500kg/ m ³, thus they have a distinct low density.