If you use light steel keels for the suspended ceiling, you can only use gypsum board
The other two types will use painted keels
Between them The most direct difference is that
Gypsum board is mostly used for modeling
Calcium silicate board has a longer lifespan than calcium silicate board, with a lifespan ratio of 3:40 years
The former It is more installed than the ones used by higher-end units
The latter are used more in factories
. Gypsum board is made of building gypsum as the main raw material, mixed with appropriate amounts of additives and fibers to make the board. The core is a board made of special cardboard as the surface. Gypsum board has the characteristics of light weight, sound insulation, heat insulation, strong processing performance and simple construction method.
There are many varieties of gypsum boards. There are three common types of gypsum boards on the market:
(1) Ordinary gypsum boards: ivory white core, gray Paper is the most economical and common variety. It is suitable for use in places without special requirements. The continuous relative humidity of the place of use does not exceed 65%. Because of the price, many people like to use 9.5mm thick ordinary gypsum board for suspended ceilings or partition walls. However, because 9.5mm ordinary gypsum board is relatively thin and not strong enough, it is prone to deformation under humid conditions. It is recommended to use gypsum boards above 12mm. At the same time, using thicker boards is also an effective means to prevent joint cracking.
(2) Water-resistant paper-faced gypsum board: Its board core and protective paper have been waterproofed. According to the requirements of the national standard, the paper surface and board core of water-resistant paper-faced gypsum board must meet certain standards. Waterproof requirements (surface water absorption shall not exceed 160 grams, water absorption shall not exceed 10%). Water-resistant gypsum board is suitable for use in places where the continuous relative humidity does not exceed 95%, such as toilets, bathrooms, etc.
(3) Fire-resistant gypsum board: Refractory materials and a large amount of glass fibers are added to the core of the board. If you cut the gypsum board, you can see a lot of glass fibers from the cross section. Good-quality fire-resistant gypsum boards will use alkali-free glass fiber with good fire-resistant properties, and most products will use medium-alkali or high-alkali glass fiber.
Paper-faced gypsum board is a lightweight construction thin board made of natural gypsum and protective paper as the main raw materials, mixed with an appropriate amount of fiber, starch, coagulant, foaming agent and water. As a new type of building material, gypsum board has the following performance characteristics:
(1) Low production energy consumption and high production efficiency: The energy consumption of producing the same unit of gypsum board is higher than that of cement Save 78%. It has low investment, large production capacity, simple process, and is convenient for large-scale production.
(2) Lightweight: Using paper-faced gypsum boards as partition walls weighs only 1/15 of brick walls of the same thickness and 1/10 of block walls, which is beneficial to the structure's earthquake resistance and can Effectively reduce the cost of foundation and structural main body.
(3) Thermal insulation: About 60% of the gypsum board core is made up of tiny pores. Since the thermal conductivity of air is very small, it has good lightweight thermal insulation properties.
(4) Good fire resistance: Since the gypsum core itself is non-combustible, and will absorb a large amount of heat in the process of releasing combined water when exposed to fire, delaying the increase in ambient temperature, therefore, paper gypsum The board has good fire retardant properties. Tested by the National Fire Protection Testing Center, the fire resistance limit of gypsum board partition walls can reach 4 hours.
(5) Good sound insulation performance: A single-layer wall made of a single lightweight material, such as aerated concrete, expanded perlite board, etc., can meet the sound insulation requirements only when its thickness is very large, while paper The gypsum board partition wall has a unique cavity structure and has good sound insulation performance.
(6) Good decorative function: The surface of the gypsum board is flat, and the seams between the boards form a seamless surface, and the surface can be directly decorated.
(7) Easy processing and good constructability: Gypsum board has the properties of being nailed, planed, sawed and glued. It can be used for interior decoration and can achieve ideal decorative effects. You can cut the gypsum board at will with a cutting knife. The construction is very convenient. Using it as decorative materials can greatly improve the construction efficiency.
(8) Comfortable living function: Because the porosity of gypsum board is large and the pore structure is properly distributed, it has high breathability. When the indoor humidity is high, it can absorb moisture, and when the air is dry, it can release part of the moisture, thus playing a certain role in regulating the indoor humidity. Abroad, this function of gypsum board is called the "breathing" function. It is precisely because of this unique "breathing" property of gypsum board that it can regulate indoor humidity within a certain range, making living conditions more comfortable.
(9) Green and environmentally friendly: Gypsum board uses natural gypsum and paper as raw materials, and does not contain asbestos that is harmful to the human body (the vast majority of calcium silicate boards and cement fiber boards use asbestos as reinforcing material for panels).
(10) Space saving: Use gypsum board as the wall. The minimum thickness of the wall can reach 74mm, and the sound insulation and anti-proof performance of the wall can be guaranteed.
Because gypsum board has the characteristics of light weight, fire protection, sound insulation, heat preservation, heat insulation, strong processability (can be planed, nailed, and sawed), easy construction, and good disassembly and assembly performance, it increases Due to its large usable area and other advantages, it is widely used in various industrial buildings and civil buildings, especially as interior wall materials and decoration materials in high-rise buildings. For example: used in non-load-bearing walls, indoor veneers, ceilings, etc. in cabinet structures.
Calcium silicate board, also known as gypsum composite board, is a porous material with good sound insulation and heat insulation properties. , when the indoor air is humid, it can attract water molecules in the air, and when the air is dry, it can release water molecules, which can appropriately adjust indoor dryness and humidity and increase comfort. Gypsum products are special fireproof materials that can produce endothermic reactions in flames. At the same time, they release water molecules to prevent the spread of fire, and will not decompose to produce any toxic, corrosive, or suffocating gases, nor will they produce any Combustion aid or smoke.
Compared with gypsum board, calcium silicate board retains the beauty of gypsum board in appearance; its weight is much lower than that of gypsum board, and its strength is much higher than that of gypsum board; it completely prevents the deformation of gypsum board due to moisture. It has the fatal weakness of the material, extending the service life of the material several times; it is also better than the gypsum board in terms of functions such as noise reduction and thermal insulation.
What is calcium silicate board? People regard lime as the (All kinds of calcareous materials can be used, such as cement, etc.), quartz powder (all kinds of siliceous materials can be used) as the main body, fiber as reinforcing material, mixed with water to make a slab, and then cured by autoclaving The lightweight board is called calcium silicate board. Calcium silicate board was invented by the American OCFG Company. It is a new type of building board famous for its comprehensive performance. It was promoted, used and developed in developed countries in the 1970s, and soon became popular all over the world.
There are currently two types of calcium silicate boards in China, one is calcium silicate board for insulation, and the other is calcium silicate board for decoration. Calcium silicate board for thermal insulation is also called microporous calcium silicate board. It is a new type of white and hard insulation material. It has the characteristics of light weight, high strength, small thermal conductivity, high temperature resistance, corrosion resistance, ability to cut and saw, etc. Features, it is widely used in thermal insulation, fire and sound insulation of equipment pipelines, walls and roofs in the fields of electric power, metallurgy, petrochemicals, construction, ships, aerospace, submarines and other fields. Its thickness is usually more than 20mm, its density is 110~400kg/m3, and its working temperature can reach up to 1000℃. Calcium silicate board for decoration is also called fiber cement board. It is a lightweight board with energy saving, environmental protection, safety and multi-functional properties. Calcium silicate board is a mixture of siliceous materials and calcium materials in a certain proportion, with organic synthetic fibers, inorganic mineral fibers or cellulose fibers and other short fibers as reinforcing materials. It is pulped, formed, autoclaved and cured, and dried. A new type of lightweight plate made by processes such as sanding and sanding. It has the advantages of being lightweight and high-strength, fireproof and heat-insulating, small shrinkage and deformation, good processability, and easy for surface decoration; it can be widely used in interior walls, exterior walls, etc. of buildings. Suspended ceilings, roofs and ventilation ducts, as well as sound-absorbing panels and fire-resistant partition boards in gymnasiums, theaters, and conference rooms, can also be used in various special-purpose industrial facilities, such as sound insulation walls and enclosure panels on highways, and water spraying in power plant cooling towers. Boards, permanent formwork for construction projects, waterproof boards for steel structures, compartment boards for trains and ships, boards for mobile homes, outer panels for large-scale composite board factories, etc.
Fire retardant and flame retardant is the outstanding performance of calcium silicate board. For interior and exterior wall panels, ceiling panels, carriages, offshore buildings, ship interior partitions and other parts that have both fire protection requirements, calcium silicate board It is important to choose the decoration materials. In order to achieve the goal of 50% energy saving in new buildings, thermal insulation materials are an indispensable and important component of modern building wall materials.
Taking into account the unique and excellent properties of calcium silicate boards in lightweight wall panels, it is expected that by 2010, it will be used for building exterior wall insulation, interior decoration, boiler and chemical pipeline insulation, thermal power generation, The market space for industrial drying furnace walls and ship partition wall materials can reach 300 million to 350 million square meters. The real estate industry has become a new growth point of the national economy. The development of the real estate industry will surely drive the development of the construction industry and the building materials industry, especially the rapid development of high-rise buildings and decoration projects. For buildings that are lightweight, high-strength, fireproof, and thermally insulated, The demand for plate materials is increasing significantly. The construction of high-rise and super-high-rise buildings has led to an increasing demand for new wall materials that are lightweight, heat-insulating, and fire-resistant. The demand for light-board products has huge market potential.
Calcium silicate board - lightweight board
After 1997, calcium silicate board has achieved unprecedented development in the Chinese market. Under the leverage of the market economy, product prices have tended to It is reasonable and the market demand is also increasing. Despite this, at present, the popularity rate of calcium silicate boards in our country only accounts for 1% to 2%. As of 2008, the domestic demand for calcium silicate boards can reach more than 100 million square meters, especially the use of asbestos-free technology and the use of wollastonite and other raw materials, making product quality more competitive. The function of calcium silicate board in environmental protection and waste disposal has also been explored, and some companies have added fly ash, carbide slag, etc. The market prospects of waste-recycling calcium silicate boards are very promising.
As a new environmentally friendly building material, calcium silicate board not only has the functions of traditional gypsum board and mineral wool board, but also has the advantages of superior fire resistance, moisture resistance and long service life. It can be widely used in industry and commerce Engineering, suspended ceilings and partition walls of buildings, home decoration, furniture linings, billboard linings, ship compartment boards, warehouse shed boards, walls of indoor projects such as floors and tunnels, and subway ventilation flues wait.
Lightweight and convenient calcium silicate boards are used in business buildings, entertainment venues, shopping malls, hotels, factories, warehouses and new residences, decoration and renovation of public places, hospitals, theaters, stations, etc. Its main uses are industrial panels such as walls, ceilings, floors, furniture, road sound insulation, sound-absorbing barriers, ship compartments and air ducts, sound-absorbing walls, sound-absorbing ceilings, poured walls, panels of composite wall panels, etc. .
From the perspective of component development, lightweight plates also have advantages because of their light weight. Wall materials are developing in the direction of industrialized components, and lightweight panels have significant advantages in realizing componentization, matching, functionality and standardization.
Each lightweight board has its own performance advantages. As a rising star in the lightweight board family, calcium silicate board is also constantly opening up new market areas with an eye-catching development trend. For example, the main stadium of the 2008 Beijing Olympic Games - the "Bird's Nest" and the exterior walls of the gymnasium are decorated with calcium silicate boards. The important reason why calcium silicate boards are favored in large-scale key projects is that the decorative effect of calcium silicate boards is closer to the color of fair-faced concrete, and is an excellent embodiment of the concept of returning to nature. Compared with exterior materials such as glass, stone, and architectural ceramics, calcium silicate boards have the advantages of high strength, large area, light weight, and low cost. The functions of calcium silicate boards are mainly reflected in three aspects: exterior wall products, roofing products and passive fire protection. These qualities are very helpful for the building's ability to resist natural disasters, safety and security capabilities to reduce injuries, building energy saving capabilities, environmental protection and improving building comfort.
In addition, because gypsum products, cement or sandy cement products and calcium silicate products, as new "clothing" for living spaces, lightweight boards have energy-saving properties of heat insulation, non-toxic and harmless environmental protection , fireproof and waterproof safety, sound insulation, aesthetics and other multi-functionality, the application has become more and more common in both the domestic building materials market and the building materials market of foreign developed countries.
At present, my country's construction lightweight boards mainly include calcium silicate board/fiber cement board, paper-faced gypsum board, glass magnesium flat board, GRC board (glass fiber reinforced cement lightweight porous partition board), etc. Preliminary statistics show that in 2008, the national output of lightweight plates exceeded 2 billion square meters. Experts estimate that in terms of building area, various types of construction lightweight panels account for about 8% of the total application of various types of wall materials in my country, and about 12% of the application of various types of wall materials used in urban construction and maintenance.
my country's calcium silicate board industry started in the 1990s. In recent years, my country's calcium silicate board industry has achieved rapid development, with annual output growth rates exceeding 30%. According to incomplete statistics, the annual output of calcium silicate boards reached approximately 200 million square meters (based on 6 mm thick boards) in 2008, of which 30% were exported. From the perspective of production layout, my country's calcium silicate board manufacturers are mainly concentrated in the southern region, with more than 50 calcium silicate board production lines distributed in Guangdong, Zhejiang, Jiangsu, Fujian, Shandong, Hebei, Sichuan and Jiangxi. Among them, Guangdong's calcium silicate board production capacity accounts for about 1/3 of the country's total.
Calcium silicate board - multifunctional board
Calcium silicate board and fiber cement board have another new function that is attracting the attention of the construction market. In terms of cooperation with steel structures, calcium silicate boards and fiber cement boards have the advantage of being the first to move in, and are currently becoming the most compact wall materials in the high-rise building steel structure industry chain. Starting from the concept of conservation, the construction steel structure industry is calling for a new type of enclosure materials and systems suitable for steel structure buildings, which require features such as light weight, fast construction, and good building physical properties. Calcium silicate boards and fiber cement boards have taken the lead in becoming lightweight boards for steel structures, especially high-rise steel structures, to improve fire protection and function as wall materials. Through them, they can greatly reduce the weight of the wall, reduce the amount of steel used, and reduce the total cost of the building. Promoted the development of steel structures, especially high-rise steel structures. The 220,000-square-meter Wuhan Century Home is made of steel structures and fiber cement boards for the interior and exterior walls and ceilings, and the effect is very good.
In terms of safety and environmental protection, fire protection, sound insulation, earthquake resistance, rich colors, bright lines, small shrinkage and deformation, impact resistance, UV resistance, weather resistance, wear resistance, chemical corrosion resistance, easy to clean, anti-static, anti- In terms of moisture and other aspects, calcium silicate boards have comparative advantages. Among them, fiber cement boards can also be made into clear water boards, polyester boards, fluorocarbon boards, antibacterial boards, etc.
Calcium silicate boards can meet some of the needs of buildings from the aspects of energy saving and safety. Its uses are mainly reflected in the following 6 parts.
The first is the suspended ceiling. There are two types; one is the suspended ceiling in dry places, such as residential living rooms and bedrooms, offices and corridors in public places, hotel lobbies and rooms, railway station waiting rooms, waiting halls, waiting halls, performances The lounge of the venue, etc. The other is the suspended ceiling in humid places, such as residential bathrooms, kitchens, public bathrooms, bathrooms, canteens and restaurants, etc. The second is the partition wall. There are two types. One is for places with low pedestrian density, such as various partition walls in residential suites, office partitions, hotel room partitions, etc. The other is for partition walls in places with high pedestrian density, such as shopping malls and corridors. Aisles, party schools, theaters, various waiting rooms, partition walls of airplanes and ships, hospitals, etc. There are two types of outer walls of the three halos, mainly urban multi-story buildings and high-rise buildings. The fourth is flat and sloped roofs. Large-format panels can be used to make a flat roof system with light thermal insulation and waterproofing, or small-sized panels of various planar shapes can be laminated to create a slope-type roof system with light thermal insulation and watertightness (non-airtight). Roofing system, fifth is sound insulation wall, sound absorption wall, sound reflection wall, and sound insulation barrier of high-speed railway. Sixth is the passive fire protection part. Corresponding to active fire protection facilities such as fire extinguishers and sprinkler systems, those with non-combustible, high temperature resistance, and high thermal resistance properties can be called passive fire protection materials or systems. It can appear in the form of partition walls, suspended ceilings, air ducts, smoke pipes, doors, partition wall coverings, etc.
Gypsum lightweight wallboards are suitable for non-load-bearing internal partition walls of high-rise, super-high-rise frame frames and steel structure buildings. They are also suitable for internal partition walls of general frame residential buildings, repair and decoration of old buildings, especially Suitable for partition walls and ventilation ducts, pipe wells, garbage channels and other enclosure structures in kitchens, bathrooms and toilets.
At present, this product is widely used in frame buildings such as industry, residential buildings, hotels, office buildings, shopping malls, schools, and hospitals