The “infrastructure maniac” has become China’s business card in the world. At the beginning of this year, when Wuhan was building the Huoshenshan and Leishenshan hospitals, they used assembled industrialized products to the maximum extent, and they were hoisted as a whole after being spliced externally. This once again refreshed the world's understanding of Chinese construction! Behind the construction of a hospital in about 10 days is my country's increasingly mature prefabricated construction technology. The development of prefabricated buildings is inseparable from the iterative upgrade of various high-performance environmentally friendly materials. Foam ceramics is one of them.
Foamed ceramics are made from industrial solid waste such as fly ash, coal gangue, ceramic waste, construction waste, tailings, etc., and are roasted at high temperatures using advanced production technology and foaming technology. New material with porosity. Due to its low volume density, low thermal conductivity, light weight and high strength,foamed ceramics have been favored by various engineering projects since their introduction, and are known as the second-grade The "dark horse" of the construction and real estate industry in the eleventh century.
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Strong enterprises join production and R&D
Sound technical standards
The development of good materials cannot be separated from the active promotion of scientific research and production enterprises. On November 25, the 2020 Cloud Guangzhou Ceramics Industry Exhibition officially opened. Many exhibitors exhibited new technologies, new equipment and new materials related to foamed ceramics at the cloud exhibition.
For example, Kemei Kiln launched the Foam Ceramics Complete Line Project in the cloud exhibition. This project has the advantages of precise control, strong flexibility and good stability. Among them, the special tunnel kiln independently developed and designed by Kemei for foam ceramics can be up to 400 meters long and 4.5 meters wide inside the kiln. However, such an ultra-wide cross-section kiln still maintains a small temperature difference range across the kiln section and high electricity consumption. Advantages include low gas consumption. The foaming thickness of the product fired twice by this set of equipment is about 250mm, and can even reach more than 300mm. The foaming on the surface of the product is smooth and consistent, and the holes are of uniform size.Uniform and high pass rate. According to the relevant person in charge of Kemei: the company has currently built nearly 20 foam ceramic production lines for many companies.
In addition, Bohui Company launched dry powdering application technology in the field of foamed ceramics at the cloud exhibition. This technology has the advantages of simple operation process, strong formula flexibility, and high automation level. It can effectively improve the homogenization efficiency of foaming and increase the proportion of solid waste in the formula. At the same time, this technology can also save 70% of gas and 80% of water, reduce carbon dioxide and nitrogen oxide emissions by 70%, and save 100% of ceramic debonding agents. According to official information released by Bohui, this set of dry powder milling technology has many successful cases, and the first test line was settled in Dongpeng's Shandong production base, showing excellent performance in energy conservation and emission reduction.
In addition to the exhibition taking the lead in sharing new technologies, deepening industry-university-research cooperation is also a key force in promoting the transformation of the foam ceramic industry from manufacturing to smart modeling. On November 29, Jin Yitao held an industry-university-research strategic signing ceremony with Wuhan University of Technology. It is understood that Wuhan University of Technology, as a concentration of high-level talents in China's building materials and construction industry, has strong research and development capabilities in the field of silicate building materials. In recent years, some universities have focused on overcoming technical problems and established joint research laboratories, accumulating a large amount of high-quality resources, international talents and technological strength, and have made considerable achievements in foam ceramic research. It is believed that through the deep integration of industry, academia and research between schools and enterprises, the research and development of foam ceramics will achieve greater breakthroughs.
With the joint efforts of all parties, the current production standards and technologies of foam ceramics have become relatively sound. At present, foam ceramic partition boards mainly refer to the national standard "Lightweight Partition Panels for Construction" (G/BT 23451-2009) and the industry standard "Foam Ceramic Partition Panels" (T/CBCSA 12-2019). Internal control standard Q/JYLN3-2018. According to the application direction, foamed ceramics are mainly divided into exterior wall insulation panels and interior wall partition panels. The density of the exterior wall insulation board is 250~280kg/㎡, the thermal conductivity is ≤0.1W/(m·K), and the compressive strength is 2.1MPa; the density of the foamed ceramic partition board is 360~420kg/㎡, and the thermal conductivity is ≤ 0.15W/(m·K), and the compressive strength is 4.5MPa; in terms of combustion performance, both are A1-level fireproof materials.
Not only that,Currently, the construction ceramics industry has nearly 100 patented technologies for the recycling and application of bulk solid waste. Not only can it produce lightweight, high-strength and self-supporting green prefabricated New wall materials have also developed quick-assembly matching processes with short construction periods and high precision. It is understood that relying on automated production, information management and other means, many companies already have customized design, modular production, precise logistics, and assembly. Foam ceramic overall solution capabilities for professional installation
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Applications across all major construction fields
Leading architectural aesthetics
The excellent thermal insulation performance of foamed ceramics and the reuse of waste materials have effectively solved the energy consumption problem in the construction industry. Therefore, green prefabricated buildings, low-energy buildings, tall and special-shaped buildings, and buildings with special requirements for earthquake resistance, moisture resistance, moisture insulation, sound insulation, fire protection, salt spray resistance, etc.Public buildings such as medical, health care, schools, hotels, and exhibition halls are all keen on using foamed ceramics as wall materials.
The reason why foamed ceramics are sought after in various construction fields stems from its various advantages in physical properties and construction performance:
1. Compared with most wall materials, foamed ceramics are as strong as stone and traditional porcelain plates (including thin plates and thick plates); and their density is relatively high Low, it can effectively reduce the dead weight of the wall and reduce the building load.
2. The flexural strength of foamed ceramics is higher, and it is easier to achieve large board area and thickness than traditional ceramic boards in size and thickness. By reducing the plate capacity, increasing the plate thickness, and maintaining high flexural strength, the foamed ceramics reduce the degree of vitrification and brittleness, and greatly improve safety performance such as toughness and earthquake resistance. In order to expand the scope of application of the product, especially Application in super high-rise buildings provides reliable performance and quality assurance.
3. During the construction process, foamed ceramics are simple to transport and install, and the construction period is only half that of GRC components.
4. In terms of processing, foamed ceramics have strong plasticity and can be cut at will on site. The product itself has excellent waterproof performance, reducing coating costs.
5. Since high-temperature sintered ceramic products have no cold and heat shrinkage, foamed ceramics will not deform or crack regardless of severe cold or heat, and have excellent stability. Because they have strong weather resistance (acid and alkali resistance, weathering resistance), the service life can be equivalent to that of buildings. body itself.
6. Foamed ceramics themselves do not have radiation.It contains organic toxic volatiles, etc., is resistant to bacteria and mildew, and is a green and environmentally friendly high-tech product.
Through the above introduction, we can understand that foamed ceramics have excellent performance and wide range of applications, but what is its decorative effect? Most people's stereotype of foam bricks and ceramics is that they are easy to use but not attractive, and do not have the classy temperament of stone and slate. In fact, foam ceramics are both practical and decorative.
In addition to partition boards and insulation boards, foamed ceramics can be made into various decorative components after deep processing, such as Cultural reliefs, decorative lines, building roofs, Ceilings, imitation stone railings...The decorative components of foam ceramics have a grand artistic effect and strong expressiveness. They can be shaped at will according to the designer's creativity, giving the designer a broader design space; At the same time, when installed on the floor, it can be nailed or hung, can be cut into any shape, and the pattern is flexible and beautiful. It is an ideal choice for the new generation of building decoration components.
According to the earliest extant architectural theory book "Ten Books on Architecture" written by the Roman architect Vitruvius, architecture should contain three elements: utilitas (practical), firmitas (sturdiness), and venustas (beautiful). Features. In order to realize these characteristics of architecture, people need to conduct more assessments on the performance, style, and plasticity of materials, and foamed ceramics can be said to greatly comply with the above three laws. In the hands of designers, foam ceramics will open a new chapter in architectural aesthetics.
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Promote the rapid development of prefabricated buildings
Leverage the trillion-dollar market
In recent years, the industrialization of new construction represented by prefabricated buildings has advanced rapidly, and China's construction level and construction quality have continued to improve. Previously, in order to further accelerate the industrialization of new buildings, nine departments including the Ministry of Housing and Urban-Rural Development jointly issued the "Several Opinions of the Ministry of Housing and Urban-Rural Development and Other Departments on Accelerating the Industrialization of New Buildings", which proposed 37 specific measures from nine aspects. This shows the importance our country attaches to promoting prefabricated buildings.
Documents issued by relevant departments show that 30% of new buildings in my country will be assembled by 2025.rate, some experts estimate that the market size will reach 4.7 trillion yuan. In addition, the Ministry of Industry and Information Technology released news that the national industrial solid waste production in 2019 was approximately 3.5 billion tons, the processing volume and comprehensive utilization volume were approximately 900 million tons and 2 billion tons respectively, and the processing market size was approximately 600 billion yuan. Behind “prefabricated buildings” + “waste-free cities” is directly related to the trillion-dollar market!
As prefabricated buildings have become one of the main directions for the development of my country's construction industry, new green materials and solid waste recycling related to them have also ushered in new opportunities. As one of the best materials for high-value utilization in the utilization of solid waste, which is oriented toward agglomeration, industrialization, marketization, and ecology, foamed ceramics have natural adaptability in prefabricated decoration that far exceeds the current assembly PC parts (prefabricated concrete structures) and PS parts (prefabricated steel structures), the main structural materials used in the mainstream of prefabricated buildings, have attracted great attention in the field of prefabricated buildings.
In August this year, Liao Jiangling, the second-level inspector of the Guangdong Provincial Department of Housing and Urban-Rural Development, said at a seminar on the development trends of prefabricated buildings and green new materials that during the "13th Five-Year Plan" period, the Ministry of Housing and Urban-Rural Development will focus on building energy conservation, green buildings, and sustainable development. Renewable energy buildings are used as the starting point of the work to comprehensively improve the energy utilization efficiency of buildings, improve the quality of the built environment, and promote the resource utilization of construction waste. Therefore, research institutions, associations, and enterprises are particularly encouraged to leverage the advantages of industry, academia, and research to lead the iterative upgrade of foam ceramic industry technology.
In fact, foamed ceramics have natural advantages in the fields of construction and decoration, and are very suitable for use in finished homes, integrated bathrooms, and integrated kitchens currently advocated by the country. In terms of curtain walls and partition walls, foamed ceramics can replace various traditional materials before, and achieve the integration of decorative structures by compounding various surface materials. Therefore, foamed ceramics have played an indispensable role in the popularization of prefabricated decoration methods in commercial housing projects, and have greatly promoted the rapid development of prefabricated buildings.
As China's economy shifts from rapid growth to high-quality development, foamed ceramics are driving the building ceramics industry to undergo a comprehensive industrial chain transformation. With new technologies, New materials and new applications have created a new outlet for the building ceramics industry. So can the construction and ceramics industry take this opportunity to leverage the trillion-dollar market? Let us look forward to it together.
Author: Hong Xiaochun
