1.Development status
In foreign countries, rock wool thermal insulation material has been applied for decades, and it is one of the most mature materials in A-class fireproof materials. Rock wool insulation board is one of the inorganic thermal insulation materials. Compared with other A-class fire insulation materials, rock wool material has obvious advantages. Rock wool material has long internal fiber, good thermal insulation performance, small thermal conductivity, good elasticity and stable chemical performance. High rise buildings at home and abroad are widely used, The advantages of rock wool thermal insulation materials have been recognized by professional and technical personnel, but there are some deficiencies in the process of a large number of applications, including the following:
(1) In the production process of rock wool insulation board, some manufacturers, in order to pursue economic benefits and reduce the bulk density of rock wool insulation board, add a lot of adhesives in the content. The increase of adhesive leads to the rock wool insulation board easy to burn, loses the non combustion characteristics of rock wool insulation board, reduces the fire resistance of the material itself, and cannot reach the standard of A-class fire-proof material, which is prone to safety accidents.
(2) The construction quality of rock wool insulation board is directly related to the bulk density. The strength of rock wool insulation board with large capacity is higher, and the construction quality is better than that of plate with small volume density. It is not easy to deform in the construction process, and the installation process is more convenient. However, due to the relatively high density of insulation board with large capacity, the insulation performance of rock wool insulation board is worse than that of plate with small bulk density, In practical engineering, the thermal insulation performance sometimes can not meet the requirements of energy-saving software calculation results.
(3) The rock wool insulation board with low bulk density has good thermal insulation performance. Due to its low tensile and compressive strength, there is no reliable pressure bearing surface during the construction process of the external decorative surface layer. The surface flatness of the decorative surface layer is not good, the construction quality is general, and the appearance effect is general, especially when the external decorative surface layer is external marble surface layer, The construction team generally uses steel hanging marble to fill with low bulk density rock wool insulation board, which has more gaps and poor construction quality.
(4) At present, most manufacturers consider that the compressive and tensile strength of rock wool insulation board is insufficient, and the construction quality of decorative surface layer is general. In the production process, a decorative surface layer is added outside the rock wool insulation board to form the thermal insulation and decoration integrated board. However, the style of the external decorative surface layer is single, which can not meet the owner’s requirements for the diversity of decorative surface layer, In addition, the arc-shaped wall is encountered in the construction process, and the thermal insulation and decoration integrated board can not be pasted as a whole. In order to ensure the unity of the decorative surface layer, some construction enterprises use cutting into small pieces for splicing, and the splicing gap is more complex, so the overall effect of the final wall is general. In the construction process of thermal insulation and decoration integrated board, it is necessary to carry out on-site decoration layer edge treatment, and then carry out the process construction of pasting and plastic expansion bolt, which is relatively complex.
(5) Rock wool insulation boards are regular cubes. If there is a wall with a certain slope, because the thickness of rock wool insulation board is consistent, the function of filling the slope can not be completed. Therefore, it is necessary to use cement mortar to find the slope first, and then paste the rock wool insulation board. The construction process is relatively cumbersome.
(6) There are many construction procedures of rock wool insulation board, including base interface mortar, adhesive powder polystyrene particle bonding, plastic expansion bolt and base anchoring, protective layer treatment and other links, the construction process is relatively cumbersome.
(7) Rock wool thermal insulation material has good water absorption, easy to absorb the excess moisture of the external wall, and the weight gradually increases, which exceeds the bearing range of the adhesive material, and is easy to fall off and has a high repair rate.
2. Analysis of development prospects
Due to the wide application of rock wool insulation board, the quality and construction method of rock wool insulation board need to be continuously improved to make it more suitable for the actual construction needs. The development and improvement of rock wool insulation board mainly include the following aspects
(1) In recent years, the price of rock wool insulation board has increased rapidly, and the market demand is also large. Therefore, a number of new rock wool insulation manufacturers have emerged, and the quality of their products is uneven. The state should issue relevant policies to strengthen the market monitoring of rock wool thermal insulation materials, and control the quality of rock wool thermal insulation materials through monitoring, Standardize the proportion of adhesive material of rock wool insulation board, ensure its internal fire resistance, and standardize the volume density requirements of rock wool material for external wall of building, so as to prevent the application of rock wool insulation board with very low volume density and poor quality to the actual project and affect the overall construction effect.
(2) Rock wool manufacturers should constantly improve the technology of making rock wool insulation board. At present, some manufacturers change the horizontal arrangement of fiber wires in rock wool board into vertical layout to improve its thermal insulation performance, but the strength is basically the same as the original process. In the future, rock wool manufacturers should analyze the nature of rock wool materials, improve their production process, and improve the strength of rock wool insulation board, Or by adding other inorganic non-metallic materials in the interior of rock wool insulation board, to ensure the thermal insulation performance and fire resistance performance, improve its own tensile and compressive properties, and improve the construction quality of external wall insulation materials and decorative surface layer.
(3) Rock wool manufacturers should improve the production process of thermal insulation and decoration integrated board, use other materials to replace the decorative surface layer of thermal insulation decoration integrated board, and adopt a variety of decorative effects to meet the requirements of the actual owner. At this stage, the construction process of thermal insulation and decoration integrated board is more complex, the board needs to be treated on site, and then the construction is carried out. Therefore, in the future, it is considered to improve its production process, improve its construction scheme, reduce its on-site construction links, and improve its application scope.
(4) At present, the construction process of rock wool board is manual operation. The engineering and technical personnel should analyze the construction technical problems of rock wool insulation board, improve the construction links, develop relevant construction auxiliary facilities and construction auxiliary machinery, adopt mechanized construction instead of labor operation, reduce the labor intensity of construction personnel, improve the construction efficiency and improve the construction quality.
(5) Because the owners have different needs for the overall effect of the external wall, such as coating, external wall brick, marble, etc., the actual engineering method at this stage leads to poor surface flatness of the decoration surface. The technical personnel should carefully analyze the construction technology of the connecting layer between the rock wool insulation board and the external decorative surface layer, and take effective measures to improve the construction scheme, Adjust the construction technology of the connecting layer, improve the construction method of the material itself, prevent the occurrence of quality problems, ensure the construction quality of the rock wool insulation system and decorative surface layer of the building exterior wall, and meet the requirements of the acceptance appearance quality.
(6) At present, the State advocates energy conservation and emission reduction and environmental protection. The production process of rock wool insulation board needs to consume a lot of ecological resources. Rock wool manufacturers should constantly update equipment and technological innovation, eliminate backward production processes and reduce pollutant emissions, which is in line with the needs of national and social development and the national simulation policy.
3 Summary
Rock wool material is soft strip rock left by volcanic eruption. Rock wool material is made into rock wool fiber after processing. Rock wool fiber is processed to form rock wool products with different uses. Rock wool products are widely used in different industries. As a kind of rock wool products, rock wool insulation board has been widely used in the construction industry. Compared with other A-class thermal insulation and fire-proof materials, it has obvious advantages, so the market demand is large. However, rock wool insulation board also has its own corresponding disadvantages, such as complex construction technology, insufficient strength, etc, To improve the quality of materials and construction quality is the demand of the construction industry. The future development direction of rock wool insulation board is low bulk density, high strength, good heat preservation, non combustion, convenient construction and good quality. Therefore, engineering and technical personnel and related researchers should pay attention to product development and construction technology update, improve the market prospect of rock wool insulation board.
Sinopower Industries Group Limited can supply you high quality Insulation Rock Basalt Mineral Stone Wool Production Line Machinery. Welcome to visit our factory and working site.
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Post time: Aug-28-2020