Magnesium Oxychloride Cement
MOC cements have been used for millennia. The modern version, also known as Sorel cement, was patented by Stanislav Sorel in 1867, these materials have shown their worth and durability over time. MOC cement boards are extremely durable against wetting and drying cycles, freeze-thaw cycles, fire, sound transmission, mold growth, and insect damage.
MOC cement boards are superior to magnesium-oxysulfate boards as they exhibit less hygrothermal movement and are generally stronger.
Overview
- MOC cements are proven to sequester significant amounts of CO2.
- MOC fiber-matt reinforced cement boards were developed in China late in the previous century.
- MOC boards can replace all forms of gypsum, fiber-cement and non-combustible wood sheathing.
- MOC boards are easy to work using standard tooling, the dust is non-toxic.
- MOC boards can vary in density from 500 to 1500 kg/m3. Denser boards are stronger, more fire resistant and absorb less water.
- Board strength can vary from 6 MPa to over 35 MPa. depending on the formulation.
- Surfaces may be glass-smooth or textured depending on the mold and manufacturing process.
- MOC cements bond structurally to cellulose, lignum, and most minerals.
Sustainability
- MOC cement boards sequester 1kg of CO2 per square meter at 12mm thick.
- Magnesium, the predominant molecule in MOC cement can be acquired by plants, which they require for photosynthesis and germination, from granulated MOC board waste.
- MOC boards have less embedded energy when compared to gypsum and fiber cement products.
- Aluminum clips and rails are readily recycled.
- Panels would be suitable for re-purposing in most cases and at the end of their life can be ground as used as soil amendment as plants also need magnesium.
Health and Safety
- Made from minerals required for the health of people plants and animals
- No toxic ingredients, no carcinogens or VOCs
- Lighter weight per panel compared to fiber-cement and stone products
- Protects against fires