Use of foam glass

Thermal insulation materials foam glass insulation board for building thermal insulation is inorganic glass with more than 99% of its chemical composition. Experience has proved that foam glass is durable, has excellent performance and quality, and has the characteristics of fire prevention, waterproof, corrosion resistance, moth resistance, non-toxic, non aging, high strength, good dimensional stability, etc. It is an environmentally friendly material, not only suitable for the insulation of building exterior walls and basements, but also suitable for roof insulation. The following is the introduction of its five purposes:
　　
 
1. Acoustic materials
Open cell foam glass is mainly used as sound absorption material. Sound absorbing foam glass can be pasted on the concrete base with cement mortar, or built into a large cross-section ventilation muffler, or pasted on the steel base plate with adhesive. Due to its excellent characteristics, it can be used for a long time under humid and vibrating conditions. However, some experts in the industry believe that the average sound absorption coefficient of ordinary foam glass is 0 Around 4, it still cannot meet the requirements of noise control for sound absorption performance. For example, China's "Acoustic Design Code for Road Sound Barriers" requires that the average sound absorption coefficient of the sound-absorbing materials used in road sound barriers be greater than 0 5. By adjusting the formula of the mixture, improving the roasting process and processing method, they increased the connected porosity of foam glass from about 60% to about 80%, with an average sound absorption coefficient greater than 0 6 is an efficient sound-absorbing material.
 
2. Lightweight filling material
At present, there is no relevant report on the application of foam glass plate as a lightweight filler material in municipal construction in China. However, in Japan, researchers have conducted research on this and successfully applied it to municipal engineering.
Using foam glass as light filling material has the following advantages: (1) The main chemical component of foam glass is inorganic glass, which has good heat resistance and chemical erosion resistance. (2) Foam glass will not release harmful substances and will not pollute the foundation and underground. It is an environmentally friendly material. (3) The apparent density of foam glass can be controlled by production process parameters to adapt to different foundation conditions. (4) Closed cell foam glass has closed pores and is not connected with the outside world, and its quality will not change due to rain and water absorption. (5) The shape and size of granular foam glass are similar to ordinary pebbles and gravels, so its landfill method is similar to ordinary foundation materials, and no special construction machinery is required.
 
3. Lightweight concrete aggregate
Improving the thermal insulation performance of various building envelope structures while maintaining the same thickness of the fence is one of the important issues in the construction industry. Reducing the average apparent density of lightweight concrete to 700-900 kg/m3 is considered the most effective method to improve the thermal insulation performance of the external enclosure structure. Foam glass as lightweight concrete aggregate was first reported in france. In the 1930s, foam glass produced by St. Gubain in France was mainly used as lightweight aggregate for concrete because of its large pore diameter and uneven distribution. Subsequently, many countries conducted relevant research. Russian Saving Technologies LTD has developed granular and tabular foam glass, in which granular foam glass can be directly used as lightweight concrete aggregate. There are also related reports in Japan. For the reinforced concrete anchor mixed with granular foam glass aggregate, the mass of granular foam glass is reduced from 760 kg to 550 kg, so it is easier to build and the transportation cost is greatly reduced.
 
On the other hand, due to the fact that about 80% of the volume of concrete is composed of sand and gravel aggregates, in order to obtain these raw materials, it may be necessary to excavate mountains and gravel, damage vegetation, cause soil erosion, and lead to landslides; Or it may be necessary to excavate the riverbed, change its height, shape, and position, damage embankments and waterways, pollute the river water, and in severe cases, divert the river, thereby losing beautiful natural landscapes such as riverbanks. If foam glass is used as lightweight concrete aggregate, it can not only reduce pollution, but also save resources, which is an effective way to green building materials.
 
4 Water retaining materials for greening
In order to solve the problem of "gray pollution" in concrete, people have adopted many methods. Nowadays, a material called porous concrete or green concrete is becoming popular internationally, and its application in Japan is relatively mature. However, as a concrete bonding material, cement still consumes a large amount of resources and energy, and causes environmental pollution. In order to further promote the harmonious development between humans and nature, many scholars have begun to develop other green ecological materials. As mentioned above, the water absorption of open cell foam glass is 50%~70%, and some even higher. It is precisely because of its excellent water absorption and retention performance that experts from Saga University in Japan and others. We considered applying it to greening projects and conducted a series of experiments, which were successful. They will have a size of 50 The 0 cm × 8. 0 cm × 1. 0 cm foam glass plate is fixed on the slope of the rock foundation as a water retaining material. This kind of board has the characteristics of light weight and excellent water retention performance. Therefore, when the slope becomes dry due to water loss, the water stored in the foam glass board can continue to supply the soil and tree roots. These foam glass plates are staggered to prevent soil loss.

　　
 
5. Building exterior wall insulation and roof insulation
As the external thermal insulation material of external wall, foam glass panel can effectively reduce the wall thickness, reduce the quality of building structure, and expand the use area. Tian Yingliang of Beijing University of Technology and other experts studied the specific application of foam glass in building energy conservation, and believed that foam glass of corresponding thickness should be calculated and selected according to the requirements of heat transfer coefficient in different regions. There are three main structural forms that can be used for building roof thermal insulation: upright flat roof, inverted flat roof, and pitched roof. In these structures, the foam glass manufacturers can easily combine it with other inorganic materials, and the construction is easy, with better waterproof, fireproof and thermal insulation effects.