The base layer used is mainly concrete cast-in-place or precast concrete slabs and cement mortar screed. There is a separate in-situ foaming polyurethane, both as a waterproof layer and as a thermal insulation layer; some as one of the waterproof layers.
1 rigid foamed polyurethane
Rigid foamed polyurethane is used in roofing works to provide both waterproof and thermal insulation.
1.1 Performance characteristics
Among all building insulation materials, foamed polyurethane has the lowest thermal conductivity of 0.033 W/(m·K); the internal structure has a sealing ratio of ≥92%, and the foamed surface layer forms a smooth film with closed cells. The rate is close to 100%, with high water repellency; compressive strength >150MPa at a density of 40kg/m3; a certain elasticity, elongation is 10%; for metal, concrete, masonry, wood, glass Very good adhesion.
1.2 Use characteristics
The rigid foamed polyurethane adopts two methods of on-site spray foaming and composite precasting. Jet foaming uses two components to join together during spraying and reacts immediately to form a foamed polyurethane. This method can be used in large quantities for in-situ foaming. In the case of unsuitable foaming in the field, a prefabricated composite board can be used, and the gap between the boards can be filled with a foaming gun, and the effect is also good.
1.3 Scope of use
Rigid foamed polyurethane can be used in a variety of roofing projects. The base layer used is mainly concrete cast-in-place or precast concrete slab and cement mortar screed. There is a separate in-situ foaming polyurethane, which is used as both a waterproof layer and a heat-insulating layer; some as one of the waterproof layers, and at the same time, a heat-insulating layer, which is composited with a waterproof roll or a waterproof coating; also has a waterproof coating, a waterproof roll, and a hair Three kinds of materials of foamed polyurethane are combined to form a waterproof and thermal insulation layer. The slope roofing method mainly foams on the base concrete and then hangs the tiles on it. These two forms of roof waterproofing and insulation effect are very good, but because the rigid foamed polyurethane has poor UV radiation resistance, the upper part must be provided with a protective layer during construction. In the flat roofing project, it can be used in combination with other waterproof materials, and the rigid foamed polyamine cheese is placed in the lower part of the waterproof layer. The fundamental solution to the problem of insulation in flat roofs is to use structurally sloped roof structures, especially cast-in-place concrete roofing, in the design of roofing structures using rigid foamed polyurethane.
2 biaxially stretched polyvinyl chloride sheet
Biaxial stretching means that at a certain high temperature, the polyvinyl chloride sheet is 100% stretched in two directions perpendicular to each other, so that the molecular chains of the polyvinyl chloride sheet are reordered, so that the cohesive force of the molecules is large. Increased, significantly improved the physical and mechanical properties of the board. Before stretching, the anti-UV layer and the polyvinyl chloride layer are co-extruded and then subjected to a biaxial stretching process, which ensures that the ultraviolet shielding layer is uniformly and densely covered on the surface layer of the sheet, and is completely integrated with the polyvinyl chloride layer. . This process overcomes the weakness of the strength and durability of ordinary polyvinyl chloride sheets and becomes a high-grade high-quality material.
2.1 Performance characteristics
Strong impact resistance (up to 1200kj/m2), more than 2 times that of ordinary PVC sheet; anti-ice force test, stone diameter 30mm, not broken; 50kg heavy sandbag test, can withstand height 120cm (plate thickness 1.2mm); It can be used under low temperature conditions of -30 oc; the light transmission performance can reach 90% (the original 80% can be maintained after 10 years); the impact resistance is >900kJ/m2 after 10 years; the impact resistance after bending is >500kJ/m2 It has strong corrosion resistance, is not affected by the atmosphere, rain, snow and chemical agents, and will not be swallowed by biological species; it has good flame retardant performance and is a difficult material for building materials.
2.2 Main size specifications
The thickness of the sheet is 0.6-2mm and the width is about 1.1mm. The length can be determined according to the actual engineering needs, generally not exceeding 22m.
2.3 Scope of use
Biaxially stretched polyvinyl chloride sheets are classified into two types, colored and colorless. It can be used for waterproofing of large public buildings, industrial plants, stadiums, flower planting and aquaculture greenhouses, shelters, gazebos, etc. It can also be used for indoor screens, soundproof curtain walls, safety hoods, walls of houses, guardrails, and partitions. Wall partitions, site safety barriers and tunnels.
3 Co-extruded sandwich foamed polyvinyl chloride sheet
The production and use of co-extruded sandwich foamed polyvinyl chloride slabs has just begun in China. Due to high production efficiency, reliable quality, reasonable price and beautiful appearance, it has sprung up in roofing waterproof materials. Its shape is like a small asbestos tile, the length can be determined according to needs; the other shape is similar to the shape of the European tile. After the width is determined, the length can be determined according to needs, and the color can be various.
3.1 Performance characteristics
Light weight, good toughness, strong impact resistance, uniform foam, smooth surface, can be planed, nailed, sawed, sticky, thermoplastic, can be processed by molding equipment; weathering, corrosion resistance, UV resistance, waterproof , insulation, flame retardant, heat preservation, heat insulation, easy to install and construct. Its performance is shown in Table 1.
3.2 Scope of use
It can be used for slope roofs of public buildings, residential buildings, factory buildings, etc. It can also be used for interior and exterior decoration and partitioning of buildings. The thickness of the tile is 2-20mm (currently produced is mainly 3-5mm), the width is 880-1040mm, and the length can be made according to requirements. The color of the tile can be formulated in the raw material or painted after extrusion.
4 color profiled steel plate
The color profiled steel plate is pressed and formed at the factory or at the construction site. The steel plate used is a strip pre-coated product, which is produced by chemical pretreatment, initial coating and fine coating on a high-speed continuous unit. The quality of the painted metal is more uniform and stable than that of a single-piece spray or brushed metal surface. The color coated steel sheet has excellent decorative property, moldability, corrosion resistance, strong coating adhesion, and can maintain bright color for a long time.
4.1 Performance characteristics
Light weight; long service life, 15-30 years of use; high construction efficiency, compared with the traditional structure, can shorten the construction period by 20%; wide color selection; reasonable section, can make full use of steel plate strength, with good strength and Stiffness; good heat resistance, continuous heating for 96h in 120oC oven, no obvious change in coating gloss and color; good low temperature resistance, no obvious change in coating bending and impact resistance after standing at -54oC for 24h; The service life can reach 15-30 years without scratching the layer.
4.2 Scope of use
It is suitable for building roof slabs and wall slabs, especially for roofing and retaining structures of large-span factory buildings, warehouses and mobile homes. The thickness of the veneer of the color profiled composite board is generally 0.6-0.8 mm. The height of the plate peak is 15-130mm, the width of the plate is 600-900mm (effective width), and the length is determined according to needs. The roof structure is composed of light beams and rafts, and the plates and rafts are anchored by screws. The color profiled composite board can also be used in combination with the heat insulating material. The thickness of the plate is generally 0.6-1.5 mm, and the peak is similar to that of the single board, and the width is about 1 m, and the length is determined according to requirements. The top structural layer of the roof is: color pressed composite board + mineral wool - aluminum foil + steel mesh + silencer cloth + honeycomb aluminum plate + purlin + light steel file. The board and the board, the board and the stringer are screwed. There are also some simple construction levels, the color compression composite board - mineral wool + aluminum foil - purlin + roof truss.
5 polycarbonate board
Polycarbonate sheet is a good architectural decoration and roof waterproofing material. It has been used in many large public buildings and public facilities in China in recent years.
5.1 Performance characteristics
The thickness is generally 1-8mm, and the size can be determined as needed. Polycarbonate sheets are divided into single and double sheets. Light weight, high strength, impact resistance, not easy to break, colorful, waterproof, heat insulation, light transmission, sound insulation, flame retardant, anti-UV, anti-infrared, no need to heat, can be bent, easy to operate, civilized construction, clean and tidy Features. Temperature resistance up to -40-120oc; heat transfer coefficient: veneer 4.64-5.49W/(m2·K); density 1.20g/cm3; 8mm thick transparent plate transmittance 82%; tensile strength 72MPa; The bending strength is 97 MPa; the bending elastic modulus is 2400 MPa.
5.2 Scope of use
It can be used for interior and exterior decoration of buildings, roofs, walls, partitions, curtain walls, etc., as well as greenhouses, public telephone booths, billboards, light boxes and display arrangements.
6 thermal insulation waterproof display panel
6.1 Performance characteristics
The thermal insulation waterproof roof panel is a self-waterproof roof panel made in a prefabricated factory, and the surface can be sprayed with color paint. The plate consists of steel frame ribs and waterproof layer, thermal insulation layer and fiber or steel wire. The top level of the structure is: special cement plus glass mesh cloth or steel mesh - particle insulation layer - special cement mortar plus glass mesh cloth 1 layer - pumice insulation core material (or perlite, rock wool) - Special cement layer with glass mesh cloth or galvanized steel wire mesh. The thickness of the plate is 80-150mm, wherein the thermal insulation layer is 60mm thick, and the size of the plate is usually 1500mm*6000mm*80mm, 1500mm*3000mm*80mm, 3000mm*3000mm*80mm.
6.2 Scope of use
One type is the roof slab for the grid (steel truss structure and other small-span steel trusses); the other is the large-span roof slab (>4m) used in conjunction with the steel truss. The board develops in a multi-functional direction (from waterproof to waterproof, decorative, and functional use), and the waterproof material develops toward the composite direction of waterproof technology (combination of different materials, such as color plates and glass), and the roof form is complicated to develop.
7 U-shaped glass plate
U-shaped glass plate is a new type of architectural glass commonly used in foreign countries. It is continuously produced by first rolling and forming. It is named because its cross section is U-shaped. U-shaped glass has ideal light transmission, heat insulation, heat preservation and high mechanical strength, convenient construction and unique architectural decoration effect.
7.1 Performance characteristics
It is divided into ordinary type and wire mesh reinforced type from the strength; it is divided into ordinary pattern type and pattern pattern type from the surface state; it is divided into colorless and colored type from color, and the color type is divided into body coloring and coating coloring. Specification size thickness 6mm; wing width 41mm bottom width is divided into: 150mm, 330mm, 500mm three. U-shaped glass is made of materials such as waste glass and quartz sand. It has the characteristics of land saving, energy saving, manpower saving, environmental protection and safety and economy.
7.2 Scope of use
Mainly used for building roofs, envelopes, non-bearing walls, inner partitions, etc. As a wall material and roofing material, it can be used vertically, horizontally and obliquely. It can be used in single row, double row or other forms. It is a multi-purpose building component profile.
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