Moss glass is directly attached to the surface of the external wall in the exterior insulation of the building. The study uses carbon powder as the foaming agent, and the foaming temperature is high, which is beneficial to the energy saving of the bottom building. The wall insulation is an important part of the external insulation. It is a development trend. The most widely used and mature wall insulation method at home and abroad is the EPS method, namely, the polystyrene foam board paste, the flexible mortar cover and the alkali-resistant glass fiber mesh reinforced external wall thermal insulation composite system. With the wide application of EPS systems, its shortcomings are also constantly exposed, such as: complex construction process, strict requirements of various links, high cost, not resistant to negative pressure, as well as material aging and service life, fire protection of insulation layer, etc. After several years of use, the quality hazards such as shedding, hollowing, and cracking prompted people to explore some better and updated external insulation methods. Due to its series of excellent properties, foam glass is not only suitable for thermal insulation of industrial equipment and pipelines, but also suitable for building exterior walls and roof insulation. The experience of using foam glass as a building insulation material at home and abroad proves that foam glass is not only of good quality but also durable. Foam glass has the characteristics of fireproof, waterproof, corrosion resistant, non-combustible, anti-mite, non-toxic, non-aging, non-radioactive, high mechanical strength and good dimensional stability. Foam glass is mostly made of waste glass, fly ash and other industrial wastes. It is an environmentally friendly thermal insulation material. Foam glass is easy to construct and can be directly bonded to the outer wall surface with cement mortar. However, since the surface of the foam glass is ash-gray porous structure, it is not decorative. It needs to be affixed with ceramic tile or mortar protection and decorative layer on the surface, which not only increases the construction. Difficulty and cost, but also the reliability of the structure. This study sought to develop a bubble with a dense glass decorative layer to complete the insulation and decoration. There have been similar attempts in China 1121, but it is either mechanically coupled to the tile or foamed glass with a curved hard shell on the upper surface, which is different from the principle of this study. In this study, a layer of glass powder containing no foaming agent is uniformly distributed on the bottom of the mold, and is sintered at a high temperature to form a dense decorative layer closely combined with the foamed layer. 1 Test part 1.1 using raw material waste glass: Foam glass is usually made from waste glass. Due to the fierce competition in the flat glass market in recent years, many manufacturers have increased the amount of waste glass in raw materials, and the purchase price of waste glass has also been rising, and the supply is limited. On the other hand, in order to ensure the quality of flat glass, the factory pulverized and washed the recycled waste glass, about 10% of which was waste that could not be re-kiln, thousands of tons per year, and the purchase price per ton of waste glass was 400. In terms of yuan, it loses millions of yuan every year. These wastes are glass powders containing a small amount of refractory powder, iron filings, aluminum shavings and plastic chips (from the pulverized cap), which are appropriately adjusted according to their composition and can be used as raw materials for foam glass. Foaming agent: Limestone, carbon powder, etc. are commonly used as foaming agents in the production of foam glass. For the waste glass used in this study, the mature formula and tests have shown that when the 5% carbon lime or a 5% carbon powder is used as the foaming agent, the suitable foaming temperature is 750C and 900 degrees respectively, and then a large continuous pore is formed. Limestone is used as a foaming agent, and its bubble structure is a continuous bubble, which is commonly used in the manufacture of sound absorbing foam glass. The dense layer of the present is better sintered. Flux, opacifier and colorant: For the dense layer, in the foaming kiln, there is a foam layer on the bottom, and a bottom plate of the refractory mold, which is difficult to reach the sintering temperature, and the addition of the flux is beneficial to the melting and sintering thereof. Opacifiers and colorants increase the hiding power and color of the dense layer. In this test, borax is used as a fluxing agent, zinc oxide and quartz sand are used as an opacifying agent, and coloring agents can be selected from various mineral raw materials as needed. Release agent: To prevent the adhesion of the product to the mold, refractory mud or 0i 03mm quartz sand is used as the release agent. 1.2 Experimental device Fire material bottom plate. 1.3 Experimental process Glass factory waste glass powder particle size range of about 0 ~ 10mm, directly into the ball mill for 40 ~ 60min after screening results as shown in Table 1. Table 1 after ball milling particle size distribution particle size / below total As a dense layer raw material, a15 mm or less (about 56%) is used as a raw material for the foam layer. 1.3.1 The dense layer constitutes the dense layer of the product, which is equivalent to using the waste glass powder as the raw material to produce the glass mosaic brick by the sintering method. Related research has carried out a large number of formula tests, the best formula is: 1 coarse glass powder (a 85mm or so) 97% ~ 98% zinc oxide 2% ~ 3% 2 coarse glass powder) 95% quartz sand (003mm) 5% was fired at 950 C for 1 h, then cooled and annealed. Formula 1 can obtain a sapphire color product, and Formulation 2 can produce a gray-white product, both of which have high strength, a compact cross section, and a glass luster. If only glass powder is used for sintering, there will be a large number of bubbles in the product. This is because there are accumulated pores between the coarse glass powder particles. When sintering, the surface of the glass particles softens first, bonds and deforms, and the formation of a closed gas on the surface of the product cannot be eliminated. . After adding a small amount of ultrafine (ft) quartz stone, the surface of each glass powder is covered with quartz sand fine powder. The glass powder is softened and deformed by heat. When compacted, the surface is not adhered by quartz sand, and the gas is eliminated; the temperature is higher. When the viscosity of the glass is lowered, the quartz sand enters into it, and becomes integral with the glass and acts as an emulsion. The mechanism of action of zinc oxide is similar. When the dense layer and the foamed layer are simultaneously fired, the firing temperature is not optimal (best hair Bubble temperature), due to the coverage of the foam layer, the sintering temperature of the dense layer is actually difficult to reach 900 C, and the addition of borax as a flux can lower the firing temperature of the dense layer. After repeated trials, determine the formula of the dense layer as shown in Table 2. Table 2, the dense layer formula raw material glass powder ((quartz sand, zinc oxide borax colorant formula a 05 amount of formula 205) the amount of foam layer composed of waste glass to produce foam glass, technology There are many mature formulas. Relevant data 3-5 research shows that the main factors affecting the performance of foam glass are glass powder fineness, foaming agent addition amount, foaming temperature and holding time. The main properties of foam glass are compressive (folding) strength. Apparent density and thermal conductivity, within a certain range, they are inversely proportional to the fineness of the glass powder, the amount of foaming agent added, the foaming temperature, and the holding time. Of course, the foaming agent is too much or the foaming temperature is too high. The density, strength, and thermal conductivity increase. The purpose of this study is to produce foam glass for exterior wall insulation and decoration, which needs to have a certain strength and density to match the dense layer, but the density increases the thermal conductivity, and comprehensively considers the appearance of the foam layer. The density should be controlled at 0.3~a4g/cm3, and the corresponding thermal conductivity is about a06~0.08W/(mK). After repeated tests, when the baking temperature is required to be 900C, the holding time is about 1h. When using carbon powder as the foaming agent, foam glass with an apparent density of a3~a4g/cm3 should be obtained. The optimum amount of carbon powder should be added. In a rapid resistance to rapid cooling and frost resistance 1.3.3 foaming and sintering 7mm). The mold release agent (refractory mud) is adjusted into water and slurryed on the inside of the mold and dried; about 50 g of coarse glass powder (> 015 mm) with borax and zinc oxide (quartz sand) is evenly distributed on the bottom of the mold. About 100 g of fine powder (a15 mm) of carbon powder (>25% of d075 mm) was uniformly distributed on the coarse glass frit. The mold containing the raw materials is placed in a muffle furnace, heated at a heating rate of 10 to 12 C/min to 900 for 45 minutes, and the power is turned off, and the temperature is lowered to 600 C. After annealing, it is cooled to room temperature and taken out. A multi-layer foam glass mosaic composed of a foam layer, which can be easily cut with a saw blade, and when cut to a dense layer, a force along the tangential line can be broken to break the dense layer along the cutting line. 1.3.4 Performance test and results The product is a non-homogeneous material, the foam layer and the dense layer have different functions and different requirements, so the performance test is performed separately. Machine, TYE200 type pressure testing machine, KDR-IB type thermal conductivity measuring instrument, electric drying oven, low temperature box, and equal. The apparent density, flexural strength, compressive strength, thermal conductivity and water absorption of the foamed layer were measured, as shown in Table 3. The water absorption, the rapid cooling and the rapid frost resistance of the dense layer were measured, as shown in Table 4. Table 3 Main properties of foamed layer Apparent density/kg-compressive strength/MPa flexural strength/MPa thermal conductivity water absorption rate/% Table 4 Dense layer main performance test item Water absorption rate/% test method From the test results, foam glass The performance index of the dense layer of the mosaic tile conforms to the standard of ceramic wall and floor tiles and can be used for exterior wall decoration. The foamed layer has sufficient strength to ensure a firm bond with the dense skin. 2 The application of thermal insulation on the exterior wall of the building is applied to the external insulation of the exterior wall. Foreign countries have mature experience. Many areas in China, such as Changchun in Northeast China, have a history of application for 11 years and have been widely praised 1667. Practice shows Foam glass is one of the best overall wall insulation materials. Foam glass mosaic tiles further integrate energy saving and decoration. Compared with the EPS method, the construction is simple and reliable, and the cost is low. 21 foam glass mosaic wall exterior insulation system construction and construction methods: 2 cement mortar or polymer cement mortar (cement: sand: polymer emulsion = 1:1: a2) directly paste on various walls (red brick, Concrete, hollow pets, etc.) on the leveling mortar layer. Its coefficient of linear expansion (9.6X10-6/C) and screed material. Glass and Enamel, 2004 (12) 1418 2 Deng Jiaping, Li Zelin. Composite facing foam glass insulation decorative brick. (4) 44453 He Hefeng, Xiong Lantian. Development of fly ash foam glass. Foreign construction of 4 Fang Fangli, Liu Min, Chen Deyu. Factors affecting the quality of fly ash foam glass. Comprehensive utilization of fly ash, 2003 (2) 31335 丨 Zhang Zhaoyan. Study on the performance of fly ash foam glass. Glass and æª6丨 Xiang Huatai, Qi Keming, Chen Huazhen. A new type of thermal insulation material, a foam glass. Construction technology at the end of 2001, (3): 26287 丨 Deng Jiaping, Tang Xiaoyu. Production and application of foam glass bricks for construction. New building materials, 1995 (Finish) The glass Table Lamp is a stunning and elegant lighting fixture that adds a touch of sophistication to any room. It features a base made of glass, which can come in various shapes and designs, and a lampshade that diffuses the light to create a warm and inviting ambiance. Glass Table Lamp,Glass Table Light,Glass Desk Lamp,Glass Desk Light Zhongshan Seekyo Lighting CO., Ltd. , https://www.seekyomodernlamp.com
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