Magnesium Oxide Wallboard

Transcription

1 Magnesium Oxide Wallboard Introduction Performance Models Application Factories Installment Contact Mobile: (773)

2 Introduction Magnesium oxide, more commonly called magnesia, is a versatile mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction. Some versions are suitable for a wide range of general building uses and for applications that require fire resistance, mold and mildew control, as well as sound control applications and many other benefits. As an environmentally friendly building material, magnesia board has strength and resistance due to very strong bonds between magnesium and oxygen atoms that form the magnesium oxide molecules (chemical symbol MgO). Magnesia boards are used in place of traditional gypsum drywall as wall and ceiling covering material and sheathing. It is also used in a number of other construction applications such as fascias, soffit, shaft-liner and area separation, wall sheathing, and as tile backing (backer board) or as substrates for coatings and insulated systems such as finish systems, EIFS, and some types of stucco. Source:

3 Performance Eco-friendly 100% asbestos-free No radiation No toxicity Resistance to growth of mold and mildew Insect-resistance Sound and Thermal insulation Fireproof, waterproof Sound insulation (12mm)>45db, (9mm)>45db Fire resistance > 2hours Expansion in water < 0.2% Remarkable heat insulation capability Water vapor transmission < 48.1 grams/m2.day Energy/cost/area saving Saving on structure, labor and construction period Thermal conductivity :0.139W/mk Durability Dry shrinkage rate 0.18% Corrosion-resistance Acid and alkali resistance Anti-halogen Windproof anti-earthquake Flexural strength (5mm)>14MPa, (8mm)>12MPa, (12mm)>10MPa Anti-impact (5mm)>5.2KJ/m2, (8mm)>6.0KJ/m2, (12mm)>6.7KJ/m2 Density kg/m3 Mechanical Capability Compress strength > 8.3N/mm2 Bending strength > 17.1N/mm2 Modulus of elasticity > 7845N/mm2 Tensile strength > 3.60N/mm2 Screw withdrawal strength (5mm)>34N/mm, (8mm)>57N/mm, (12mm)>63N/mm Impact strength > 23mm/mm Surface alkalinity PH Racking strength (9mm)>7.52(on 0KN),>12.09(on 5KN), (12mm)>8.41(on 0KN),>16.98(on 5KN)

4 Performance Test Data Items In accordance to Results Combustibility BS 476 Part 4 BS EN 1182 Surface Spread of Flame BS 476 Part 7 Class 1 Non-combustible National Building Regulation EN A1 and A1fl Euro class Surface Burning Characteristics Fire Rating Comparison ASTM E-84 Class A Flame Spread = 0 Smoke Developed = 0 12mm MgO Board BS 476 Part minutes 12mm Steel and Timber Partition BS 476 Part 22 9mm Steel Partition BS 476 Part minutes 132 minutes for steel 123 minutes for timber

5 Models Unsanded Sanded Thickness Width Length As short as 600mm 1830mm, 2135mm, 2440mm, 3000m (from 2ft to 10ft) As short as 600mm 915mm, 1220mm (from 2ft to 4ft) 3mm, 4mm, 6mm, 8mm, 9mm, 10mm, 12mm, 15mm, 18mm and up to 30mm Width tolerance Length tolerance Thickness tolerance Diagonal tolerance -2mm/+3mm -2mm/+2mm 3mm-4mm, -0.2/+0.2mm 6mm-9mm, -0.3/+0.3mm 10mm-12mm, -0.8/+0.8mm 15mm-18mm, -1.0mm/+1.0mm -5mm/+5mm Edge: Square, Tapered, Beveled, and Rebated Surface: Sanded and Unsanded

6 Application MgO Wallboard is suitable for a wide range of applications and is always ahead in the building regulations and demand for higher quality standards with durability, safety and economy. As a new type of cost-efficiency materials, it can replace the traditional wood and gypsum board by easy installment Suggested uses Exterior cladding Exterior wall EIFS systems Ductwork Access panels Agricultural buildings E&M service enclosures Infill for sandwich panels Passive fire protection Elevated floor underlayment Interior impact wall Prefabricated homes Interior walls Linings/partitions Moisture area wall Decorative backing boards Interior fire rated walls Furniture backing board Replace plywood and MDF Underlay of wet areas Ceramic tile substrate Countertops Eaves lining Fascia Soffits Ceilings Canopies Porch lining

7 Application Tunnels in Japan Shanghai Shangri-La Hotel and Resort Guangzhou Metro Titanic Belfast North Ireland, UK

8 Factories MgO Boards are manufactured with minimum emission of CO2, which is main cause of global warming. The whole production line is environment-friendly and contribute to limited energy consumption. Meanwhile, the manufacture does not involve toxic components such as formaldehyde, asbestos, organic solvents, heavy metals or oil. Workers health are secured in such environment compared with that in gypsum and cement production line.

9 Installment General installment guide Expansion Gaps Screws Within a single frame assembly up to mm maximum, expansion gaps between boards should be 4mm. where 2 frame assemblies meet, expansion gaps to be 10-12mm Supporting structures should be at a 400mm, maximum of 600mm centres, there should be a 4mm gap between each boards and on all edges. Boards joints should be treated accordingly with a flexible joint compound. Conditions for fixing frames over the above size must be covered on a project basis and local building regulation must be applied. Screw fixing should be self drilling/self countersinking screws in galvanized steel or stainless steel. Screw diameter should be from mm and length should be times the thickness of the board. Fixing Centres Screw heads should be just below the surface of the board and not driven too deep, Screw heads are to be covered with the jointing compound to achieve the right finished surface. Note: When fitted, the head should be flush with the surface of the board +/-1mm The screw should also be fitted normal to the board +/-5 degree

10 Installment Cutting Machining Machines and processed using tungsten carbide tipped blades at all times Type of blade, alternative or trapezoidal teeth Chart shows the number of revolutions and number of teeth(z) Diameter(mm) Board thickness up to 12mm Z=48 Z=60 Z=72 Z=72 Board thickness exceeding 12mm Z=36 Z=48 Z=54 Z=60 Number of revolutions rpm 3000 or or 1500 Milling Common machines with carbide tipped tools. The higher the rpm, the better the milled edge Sawing Drilling Portable circular saw Cross cut hand saws for thickness up to 12mm Jigsaw for thickness up to 12mm or small work Fixed saw for dimensioning(vertical or horizontal) To make holes on the board, use a masonry drill or low-high speed drill for better results. Place the board under the drilling location for a clean hole, od not use hammer for action Surface Laminating Suitable for bonding to all decorative substrate. For bonding adhesive, consult with the local adhesive manufacturer and pre-testing is advisable. Make sure that no dirt or air comes in between the adhesive and board otherwise bubbles may occur and bonding is not tight. Ceramic tiles can be applied to the board surface by using branded tile adhesive Painting Make sure that all surfaces are clean dry and free from dust dirt or sanding residues before painting. Using brand paints usually gives good results and always following the paint instructions For external painting, apply sealer or primer(refer to paint manufacturers specifications) first and remove from the surface any dust, dirt, grease or substances that may affect the bonding of the paint.

11 Installment Noncombustible Suspended Ceiling System Fire rated suspended false ceilings assessed performance to BS 476 Part 22 Ceiling channel section mm at spacing Wall angle mm Mineral wool insulation Self-tapping M4 screws at 300mm centres M6 screws at approximate 350mm centres Ceiling channel height=25mm fixed at 400mm centres U channel mm at spacing Galvanized self-tapping screws

12 Installment Acoustic and noncombustible flooring system MgO Boards are flooring substrate may be fixed to timber or steel joints. The type, size and final spacing of the joists should be determined by the structural engineers. The thickness of the joists or width must be sufficient (45mm minimum) to allow correct fixing. The boards are fixed so the lengthwise direction is Spanning across the joists. Where load requirements are greater, all board edges must be supported as in Figure C. It is recommended to apply a layer of adhesive between the board edges. Use screws with countersunk heads and screws at 300mm centers ensuring screw heads are flush with the surface. Make sure that the surface is clean and even before laying the boards Stagger all board joints ensuring they don t align with sub-floor joints. Four corners of the boards must never allow to meet at one point. Apply an even layer of tile adhesive with a trowel to the sub-floor before setting the board firmly and evenly in place.