The other two will be painted with keel.
The most direct difference between them is that
Gypsum board is mostly used for modeling.
Calcium silicate board is longer than calcium silicate board, and the life ratio is 3: 40 years.
The former is used more than the upper units.
The latter uses more factories.
Gypsum board is a board made of building gypsum as the main raw material, appropriate additives and fibers as the core material, and special cardboard as the protective surface. Gypsum board has the characteristics of light weight, sound insulation, heat insulation, strong processability and simple construction method.
There are many kinds of gypsum boards, and there are three common gypsum boards in the market:
(1) Ordinary gypsum board: ivory white core gray paper, which is the most economical and common variety. It is suitable for use places without special requirements, and the continuous relative humidity of the use places does not exceed 65%. Because of the price, many people like to use 9.5mm thick ordinary gypsum board as ceiling or partition. However, because the 9.5mm ordinary gypsum board is relatively thin, its strength is not high, and it is easy to deform under wet conditions, it is suggested to use gypsum board above 12 mm, and thick board is also an effective means to prevent joint cracking.
(2) Waterproof gypsum board: Its core material and protective paper are waterproof. According to the national standard, the paper surface and core material of waterproof gypsum board must meet certain waterproof requirements (the surface water absorption rate is not more than 160g, and the water absorption rate is not more than 10%). Water-resistant gypsum board is suitable for places where the continuous relative humidity does not exceed 95%, such as toilets and bathrooms.
(3) Refractory gypsum board: refractory materials and a large number 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 section. Good quality fire-resistant gypsum board will use alkali-free glass fiber with good fire resistance, and general products will use medium-alkali or high-alkali glass fiber.
Gypsum board is a lightweight building board made of natural gypsum and protective paper as the main raw materials, and adding appropriate amount of fiber, starch, coagulant, foaming agent and water. As a new building material, gypsum board has the following characteristics in performance:
(1) Low energy consumption and high production efficiency: the energy consumption for producing gypsum board with the same unit is 78% less than that of cement. And has the advantages of less investment, large production capacity, simple process and convenience for large-scale production.
(2) Lightweight: Gypsum board is used as the partition wall, and its weight is only115 of brick wall and110 of block wall with the same thickness, which is beneficial to the earthquake resistance of the structure and can effectively reduce the cost of foundation and main structure.
(3) Thermal insulation: About 60% of the gypsum board core is tiny pores, so it has good lightweight thermal insulation performance due to the low thermal conductivity of air.
(4) Good fireproof performance: Gypsum board has good fireproof and flame retardant performance because the gypsum core itself does not burn. In case of fire, it will absorb a lot of heat in the process of releasing bound water and delay the rise of ambient temperature. Tested by National Fire Testing Center, the fire resistance limit of gypsum board partition wall can reach 4 hours.
(5) Good sound insulation performance: Single-layer walls made of single lightweight materials, such as aerated concrete and expanded perlite board, can only meet the sound insulation requirements when they are very thick, while gypsum board partitions have unique cavity structure and good sound insulation performance.
(6) Good decorative function: the surface of gypsum board is smooth, and a seamless surface is formed between boards through joint treatment, which can directly decorate the surface.
(7) Convenient processing and good constructability: gypsum board can be nailed, planed, sawed and glued. When used in interior decoration, it can achieve ideal decorative effect. It can be cut at will with only one cutting knife, and the construction is very convenient. Using it as decorative material can greatly improve the construction efficiency.
(8) Comfortable living function: Gypsum board has high air permeability due to its large porosity and appropriate pore structure distribution. When the indoor humidity is high, it can absorb water, and when the air is dry, it can release some water, thus playing a certain role in regulating the indoor humidity. In foreign countries, this function of gypsum board is called "breathing" function. It is precisely because gypsum board has this unique "breathing" performance that it can adjust the indoor humidity within a certain range and make the living conditions more comfortable.
(9) Environmental protection: Gypsum board is made of natural gypsum and paper, and never contains asbestos harmful to human body (most calcium silicate boards and cement fiberboard use asbestos as the reinforcing material of the board).
(10) space saving: gypsum board is used for the wall, and the minimum thickness of the wall can reach 74mm, which can ensure the sound insulation and fire resistance of the wall.
Gypsum board has the advantages of light weight, fire prevention, sound insulation, heat preservation, heat insulation, good machinability (planing, nailing and sawing), convenient construction, good disassembly performance and increased use area, so it is widely used in various industrial and civil buildings, especially in high-rise buildings as interior wall materials and decorative materials. Such as: non-load-bearing walls, indoor panels, ceilings, etc. Frame structure for cabinet.
Calcium silicate board, also known as gypsum composite board, is a porous material with good sound insulation and heat insulation performance. It can attract water molecules in the air when the indoor air is wet, and release them when the air is dry. It can properly adjust the dryness and humidity of the room and increase the comfort. Gypsum products are super fireproof materials, which can produce endothermic reaction in the flame, release water molecules to prevent the fire from spreading, and will not decompose to produce any toxic, corrosive and suffocating gas, nor will it produce any combustion-supporting substances or smoke.
Compared with gypsum board, calcium silicate board retains the aesthetic feeling of gypsum board in appearance; The weight is much lower than gypsum board, and the strength is much higher than gypsum board; Completely changed the fatal weakness of gypsum board deformation due to moisture, and doubled the service life of the material; It is also superior to gypsum board in silencing, heat preservation and heat insulation functions.
What is calcium silicate board? People think that lime (all kinds of calcareous materials can be used, such as cement, etc. ) and quartz powder (all kinds of siliceous materials can be used) as the main body, fiber as the reinforcing material, mixed with water to make a plate, and then autoclaved and cured to form a light plate called calcium silicate plate. Calcium silicate board is a new type of building board with excellent comprehensive properties invented by OCFG company in the United States. It was popularized and developed from developed countries in the 1970s, and soon became popular all over the world.
At present, there are two kinds of calcium silicate boards in China, one is for thermal insulation and the other is for decoration. Calcium silicate board for thermal insulation, also known as microporous calcium silicate board, is a new type of white hard thermal insulation material, which has the characteristics of light bulk density, high strength, low thermal conductivity, high temperature resistance, corrosion resistance, cutting and sawing, and is widely used for thermal insulation, fire prevention and sound insulation of equipment, pipelines, walls and roofs in electric power, metallurgy, petrochemical, construction, ships, aerospace, submarines and other fields. Its thickness is usually
Above 20mm, the density is 1 10~400kg/m3, and the highest working temperature can reach 1000℃. Decorative calcium silicate board, also known as fiber cement board, is an energy-saving, environmentally friendly, safe and multifunctional lightweight board. Calcium silicate board is a new type of lightweight board made by mixing siliceous materials and calcareous materials in a certain proportion, using short fibers such as organic synthetic fibers, inorganic mineral fibers or cellulose fibers as reinforcing materials, and through pulping, molding, autoclaving, drying and sanding. It has the advantages of light weight, high strength, fire prevention and heat insulation, small shrinkage deformation, good processability and easy surface decoration. It can be widely used in internal walls, external walls, suspended ceilings, roofs and ventilation pipes of buildings, sound-absorbing boards and fire-proof partition boards of gymnasiums, theaters and conference rooms, and also can be used in various industrial facilities with special purposes, such as sound-proof walls, enclosure boards, shower boards of cooling towers in power plants, permanent templates of construction projects, steel structure waterproof boards with the length of 1, partition boards of trains and ships, and movable houses.
Fire prevention and flame retardant is the outstanding performance of calcium silicate board. Calcium silicate board is an important decorative material for internal and external wall panels, ceilings, carriages, offshore buildings, internal partitions of ships and other parts with fire protection requirements. In order to achieve the goal of 50% energy saving in new buildings, thermal insulation materials are an indispensable part of modern building wall materials.
Considering the unique and excellent performance of calcium silicate board in lightweight wallboard, it is estimated that by 20 10, it will be used for building external wall insulation, indoor decoration, boiler and chemical pipeline insulation, thermal power generation, industrial drying furnace wall, marine partition materials, etc., and the market space will reach 300-350 million square meters. The real estate industry has become a new growth point of national economy. The development of real estate industry will certainly promote the development of construction industry and building materials industry, especially the rapid development of high-rise buildings and decoration projects. The demand for lightweight, high-strength, fire-proof, heat-insulating and heat-insulating building plates has increased greatly. With the construction of high-rise and super-high-rise buildings, the demand for new wall materials with light weight, heat preservation and fire prevention is increasing day by day, and the demand for light board products has great market potential.
Calcium silicate board-lightweight board
After 1997, calcium silicate board has got unprecedented development in China market. Under the leverage of market economy, product prices tend to be reasonable and market demand is increasing. Nevertheless, at present, the popularization rate of calcium silicate board in China is only 1% ~ 2%. By the end of 2008, the domestic demand for calcium silicate board can reach more than 654.38 billion square meters, especially the use of asbestos-free technologies and raw materials such as wollastonite, which makes the product quality more competitive. The role of calcium silicate board in environmental protection and waste utilization has also been excavated, and some enterprises have added fly ash and carbide slag. The market prospect of waste calcium silicate board is very promising.
As a new type of environmental protection 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 prevention, moisture resistance and long service life. It can be widely used in industrial and commercial engineering, ceiling and partition walls of buildings, home decoration, lining boards of furniture, billboards, decks of ships, shed boards of warehouses, walls of indoor engineering such as floors and tunnels, and ventilation flues of subways.
The lightweight and convenient calcium silicate board can be used in commercial buildings, entertainment places, shopping malls, hotels, factories, warehouses and new houses, renovated public places, hospitals, theaters, stations and so on. Its main applications are industrial plates such as walls, ceilings, floors, furniture, road sound insulation, sound absorption barriers, ship cabins and air ducts, sound absorption walls, sound absorption ceilings, pouring walls, panels of composite wallboard and other fields.
From the perspective of developing parts, lightweight board also has advantages because of its lightness. Wall materials are developing in the direction of industrialized parts, and lightweight boards have obvious advantages in realizing parts, matching, functionalization and standardization.
Each lightweight board has its own performance advantages. As a rising star in the light-weight board family, calcium silicate board is also opening up new market areas with remarkable development momentum. For example, the main stadium of the 2008 Beijing Olympic Games-the "Bird's Nest" and the exterior wall of the gymnasium are all decorated with calcium silicate boards. The reason why calcium silicate board is favored in large-scale key projects is that its decorative effect is closer to the color of fair-faced concrete, which is an excellent embodiment of returning to nature. Compared with glass, stone and building ceramics, calcium silicate board has the advantages of high strength, large area, light weight and low cost. The function of calcium silicate board is mainly reflected in three aspects: external wall products, roofing products and passive fire prevention. These qualities are very helpful to the ability of buildings to resist natural disasters, reduce injuries, save energy, protect the environment and improve the comfort of buildings.
In addition, as the new "clothes" of living space, lightweight boards such as gypsum products, cement or sandy cement products, and calcium silicate products have many functions such as heat insulation, energy saving, innocuity, environmental protection, fire prevention, waterproof safety, sound insulation and beautiful appearance. Their application has become more and more common in the domestic building materials market and developed countries abroad. At present, China's building lightweight boards mainly include calcium silicate, board/fiber cement board, gypsum board, glass magnesium board, GRC board (glass fiber reinforced cement lightweight porous partition board) and so on. According to preliminary statistics, in 2008, the national light board output exceeded 2 billion square meters. According to the calculation of excavation experts, from the perspective of construction area, all kinds of building lightweight panels account for about 8% of the total application of all kinds of wall materials in China, and account for about 12% of the application of all kinds of wall materials used in urban construction and maintenance.
China's calcium silicate board industry started in the last century. In recent years, China's calcium silicate board industry has developed rapidly, with an annual output growth rate of over 30%. According to incomplete statistics, the annual output of calcium silicate board in 2008 reached about 200 million square meters (calculated by 6 mm thick plate), of which 30% products were exported. From the production layout, China's calcium silicate board production enterprises are mainly concentrated in the southern region, and more than 50 calcium silicate board production lines are distributed in Guangdong, Zhejiang, Jiangsu, Fujian, Shandong, Hebei, Sichuan, Jiangxi and other places. Among them, the production capacity of calcium silicate board in Guangdong accounts for about 1/3 of the whole country.
Calcium silicate board-multifunctional board
There is also a new function of calcium silicate board and fiber cement board that is attracting the attention of the construction market. In terms of cooperation with steel structures, calcium silicate board and fiber cement board have the first-Mover advantage and are becoming compact wall materials in the steel structure industry chain of high-rise buildings. Starting from the concept of economy, the building steel structure industry calls for a new type of enclosure material and system suitable for steel structure buildings, which requires light weight, fast construction and good building physical properties. Calcium silicate board and fiber cement board are the first to become the lightweight boards of steel structures, especially high-rise steel structures, which can improve the fire resistance and can also be used as wall materials. Through them, the self-weight of the wall can be greatly reduced, the amount of steel used can be reduced, the total project cost can be reduced, and the development of steel structures, especially high-rise steel structures, can be promoted. The 220,000-square-meter Wuhan Century Home adopts steel structure and fiber cement board as the interior and exterior walls and ceiling, and the effect is very good.
Calcium silicate board has comparative advantages in safety, environmental protection, fire prevention, sound insulation, earthquake resistance, rich colors, bright lines, small shrinkage deformation, impact resistance, ultraviolet resistance, weather resistance, wear resistance, chemical corrosion resistance, easy cleaning, antistatic and moisture-proof, among which fiber cement board can also be made into cleaning board, polyester board, fluorocarbon board, antibacterial board and so on.
Calcium silicate board can meet some requirements of architecture from two aspects: energy saving and safety. Its use is mainly reflected in the following six parts.
One is the ceiling. There are two kinds; One is the suspended ceiling in dry places, such as living rooms and bedrooms in houses, offices and corridors in public places, lobbies and rooms in hotels, waiting rooms in railway stations, waiting rooms for ships, waiting rooms and lounges in performance places, etc. The other is the suspended ceiling in damp places, such as residential toilets, kitchens, public toilets, bathrooms, canteens, restaurants and so on. The second is the partition wall. There are two kinds, one is the occasion with low crowd density, such as various partitions in houses, office partitions, hotel rooms and so on. ; The other is the partition of high crowd density occasions, such as shopping malls, corridors, party schools, cinemas, waiting rooms, planes, ships, hospitals and so on. There are two kinds of peripheral walls, mainly urban multi-storey buildings and high-rise buildings. Fourth, the flat slope roof. Large bay panels can be used as a light flat roof system with heat preservation, heat insulation and waterproof, or small bay panels with various plane shapes can be used as a light heat preservation, heat insulation and watertight (non-airtight) slope roof system in superposition form. Fifth, sound insulation walls, sound absorption walls, sound reflection walls and sound insulation barriers for high-speed railways. Sixth, the passive fire prevention part. Corresponding to active fire prevention facilities such as fire extinguishers and sprinkler systems, those with incombustibility, high temperature resistance and high thermal resistance can be called passive fire prevention materials or systems. It can take the form of partition walls, suspended ceilings, air ducts, smoke pipes, doors and partition wall coverings.
Gypsum lightweight wallboard is suitable for frame shear of high-rise and super-high-rise buildings and non-load-bearing internal partition walls of steel structures. It is also suitable for repairing and decorating internal partition walls of general frame houses and old buildings, especially for partition walls of kitchens, bathrooms and toilets and enclosure structures such as ventilation pipes, pipeline wells and garbage passages. At present, this product is widely used in industrial, civil housing, hotels, office buildings, shopping malls, schools, hospitals and other frame buildings.