Introduction: Foamed glass is a glass material obtained by adding chemicals to glass powder, heating and melting at high temperature, foaming, annealing and cooling. Foam glass is an inorganic material, which has a closed and independent pore structure, good thermal insulation performance at low temperature, and is not afraid of humidity, high temperature and low temperature, and is anti-corrosion and insect-proof. Very good stability, can be used for a long time, and the performance is not reduced. It can be used under the ground, in the open air or in places where it is flammable, explosive, chemical or corrosive. Foam glass is often used in the decoration of industrial plants. Like other products, foam glass has certain standards. Let's take a look at the introduction of foam glass standards.
whether it is foam glass or other materials, as long as they are artificially synthesized, there are certain standards, which must be met before they can be produced and used. For example, strength should reach a certain standard or thermal conductivity or thermal insulation, etc. This standard is promulgated by the relevant state departments. Now the standard JC/T647-25 promulgated in 25 is used. The standard refers to the technical requirements in TASTMC552, and takes into account the domestic market demand for foam glass products. After two years of revision, it was finally formed. Let's briefly introduce the content of the standard.
firstly, the service temperature range of foam glass. The standard stipulates that the temperature range is: minus 268 degrees Celsius to plus 427 degrees Celsius, which is suitable for closed-cell foam glass. For foam glass used for building insulation, the temperature requirement is-2 degrees Celsius to-4 degrees Celsius. Appearance also has corresponding regulations, such as the size and number of cracks and holes. And thermal conductivity. The thermal conductivity of superior products shall not be less than .48. There are also compressive strength and flexural strength. The compressive and flexural strength of No.16 product shall not be less than .5MPa, and that of No.18 product shall not be less than .6MPa.
and the experimental method of foam glass. Such as quality appearance, compressive strength and flexural strength, as well as thermal insulation, and so on. They are all quoted from the existing standards of the country. For example, in the experiment of temperature application range, it is stipulated that the lowest temperature of the experiment is MINUS 2 degrees Celsius, the number of samples should not be less than three, and the time in this environment should not be less than a certain number of days.
Performance
Foam glass is a kind of lightweight and high-strength building material and decorative material with superior performance of heat insulation (cold preservation), sound absorption, moisture prevention and fire prevention. Its service temperature ranges from minus 196 degrees to 45 degrees, and its Class A noncombustible life is the same as that of the building, and its moisture permeability coefficient is almost zero. Although other new thermal insulation materials emerge one after another, foam glass plays an increasingly important role in low-heat insulation, moisture-proof engineering, sound absorption and other fields because of its permanence, safety and high reliability. Its production is the reuse of waste solid materials, and it is an example of protecting the environment and obtaining rich economic benefits.
Lava foam glass: it is made of natural lava or industrial waste residue such as perlite and obsidian as basic raw materials, and a certain amount of glass powder can be added to reduce the foaming temperature, and mirabilite is used as foaming agent. Generally, it can be used as insulation materials and wall materials for buildings and industrial equipment.
Advantages
1. It is nontoxic, non-radioactive, will not release harmful substances, and will not pollute the foundation and groundwater. It is an environment-friendly material;
2. Non-combustion, low moisture absorption and water absorption, and service temperature range. The actual service temperature of ordinary foam glass is 24~28℃;
3. It is not easy to be weathered, aged, bitten by rodents and corroded by microorganisms;
4. The bulk density, open porosity, closed porosity and other properties can be adjusted by changing the formula and foaming process;
Sound absorption
Foam glass for sound absorption and silencing can not only play a good role in noise reduction, but also has the characteristics of light weight, non-flammability, non-decay, moisture absorption and non-softening, so it is widely used in damp, fire-proof and low-noise construction projects such as swimming pools, subways, food and textile workshops. Foam glass for sound absorption and noise reduction and thermal insulation can also be made into colored products under proper technology, which not only plays the role of sound absorption and thermal insulation, but also is a good decorative material with dual functions. Sound-absorbing foam glass has been widely used in subways, underground military facilities, tunnels, factory workshops, concert halls, theaters, great halls and other buildings in developed countries, as well as the appearance of buildings around airports to reduce noise. In 199s, noise-reducing and sound-absorbing materials were used in air-conditioning rooms and air ducts of Shanghai Metro, Guangzhou Metro and Great Hall of the People in China. Sound-absorbing walls used on both sides of elevated roads in Shanghai.
in this standard, the combustion performance, sound absorption performance, dimensional stability, surface combustion performance, ion content, combustion deformation size and other properties of foam glass are specified accordingly. We won't introduce it in detail here. If necessary, we can directly refer to the national standards. The above is the content of foam glass standards, hoping to help everyone!
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