Archive for category: Industry information

The latest report from the International Finance Corporation (IFC), a member of the World Bank Group, reveals the huge potential of green buildings in emerging markets. The report states that by 2030, green buildings will provide $ 24.7 trillion in investment opportunities in emerging markets alone, which will stimulate economic growth and accelerate sustainable development.

Green buildings reduce or eliminate negative impacts on the environment and climate. They can be linked to carbon and energy goals (such as net-zero emissions) and people’s health and well-being. Investment in green buildings enables market participants to manage the potential risks stemming from the global transition to a low-carbon economy.

According to IFC data, more than half of the electricity consumed by the construction industry is used for heating, cooling and lighting globally, accounting for 28% of energy-related greenhouse gas emissions.

By 2030, the potential investment in urban green buildings in emerging markets is estimated at $ 24.7 trillion. This is mainly due to the sharp increase in construction and opportunities to ensure that these buildings are green in the next decade.

The report points out that there is increasing evidence that green buildings can use energy and water resources more efficiently than standard structures and are high-value, low-risk assets. Building green buildings can save additional costs of 0.5% to 12%, while green buildings can reduce operating costs by as much as 37%, enable higher sales premiums and faster sales times of up to 31%, and increase occupancy Up to 23%, rental income can increase up to 8%.

According to the report, by 2030, 4.1 billion people are expected to live in urban areas, more than half of whom are expected to live in South and East Asia Pacific, and their housing will require more residential and commercial floor space. The East Asia Pacific region alone will provide $ 16 trillion in green building investment opportunities.

In India, the situation is no different, as India alone needs to build another 60 million homes between 2018 and 2022 to fill the existing gap. To meet demand, the Indian government has launched a “housing for all” policy in 2022, which aims to bridge the gap in urban housing by increasing the participation of the private sector.

It is important to note here that since December 2015, 194 countries have submitted plans that highlight the government ’s framework for reducing emissions through climate solutions, including renewable energy and low-carbon cities.

1. Production and storage status of autoclaved wall materials

Since 1913, China’s autoclaved brick production line has been completed in Guangdong, China’s vast majority of autoclaved brick products are collected and stored in bulk. This method allows autoclaved wall materials to be sold and transported in a small radius; bulk workers labor High strength, difficult to find labor, high cost; In addition, there are shortcomings such as high damage rate of products in bulk transportation mode and large land area for finished products in the factory.

In order to solve the problem of product packaging and transportation, some equipment manufacturing enterprises have developed manual packaging and semi-automatic packaging equipment with trays. Although this can meet the needs of some packaging, it cannot reduce the labor intensity of workers, nor can it solve the problem of difficult employment of enterprises. Pallet recycling has become a new issue. Therefore, manual and semi-automatic palletized packaging equipment cannot meet the needs of customers, and autoclaved wall materials companies are still developing hard.

2.The birth of fully automatic no-pallet packaging unit

The customer’s problems and the pursuit of solutions are the driving force for the birth of new technologies and products. With the goal of “liberating industrial workers from heavy labor”, we strive to provide better solutions for wall material manufacturers. The company’s executives worry about the urgency of the industry and invested heavily in the development of fully automatic trayless packaging technology. With in-depth understanding of user needs and continuous breakthroughs in key technologies, in 2012, fully automatic trayless packaging units were born.

3.Advantages of fully automatic no-pallet packaging unit

Fully automatic no-pallet packaging technology is a finished product packaging processing technology that extends at the back end of the autoclaved wall material production process line. It packs and stacks the products after the autoclave, which greatly reduces the damage of finished products during loading, unloading, storage, and transportation. It solves the problem that the end-packing, storage, and transportation of autoclaved wall material enterprises cannot be automated, and the trend of automated packaging, packaging, and transportation of autoclaved wall material products has been well received by users.

“No-pallet” packaging is designed to recycle the internal components of the equipment, and does not participate in product sales, avoiding losses caused by the use of wooden pallets. (Using a new building material factory with an annual output of 120 million pieces in tray packaging, only the damage caused by the damage to the tray is as high as several hundred thousand yuan.)
The automatic trayless packaging unit has a high degree of automation. The entire packaging production line requires only two people to operate, but the production capacity is as high as 300,000 pieces / day. The huge advantage in the production process makes its comprehensive packaging cost only 0.008-0.01 yuan / piece (including Packaging tapes, unit operators, electricity, equipment depreciation, and packaging materials such as base film). The sales radius of packaged products can be increased by 100km-200km.

Based on fully automatic palletless packaging technology, the company has developed a series of products such as autoclaved brickless palletless packaging units, aerated concrete palletless packaging units, aerated plate palletless packaging units, and sintered brick automatic unloading and packaging units. For the entire industry companies can also carry out customized development based on trayless packaging technology according to demand!

China’s economy has shifted from a high-speed growth stage to a high-quality development stage. Promoting high-quality development is the fundamental requirement for China to determine development ideas, formulate economic policies, and achieve macro-control. The implementation of supply-side structural reforms in all walks of life must be based on this guiding ideology. The wall material industry must unswervingly implement this requirement in order to truly achieve sustainable development.

High-strength, low-density aerated concrete should be developed

At present, Jiangsu Province has taken the production lines of aerated concrete blocks of 150,000 cubic meters and 100,000 cubic meters respectively as restricted and eliminated products, and aerated concrete plates as encouraged products, which is quite correct. Recently, Shanghai has also listed 180,000 cubic meters of aerated concrete production enterprises as a restricted list and included it in the negative list of industrial restructuring. It will no longer enjoy preferential policies such as tax reduction and exemption. Therefore, some suggestions on the technical innovation of aerated concrete slabs:

First, the development of aerated concrete panels focuses on improving the quality and function of aerated concrete itself. Aerated concrete sheet is mainly used for exterior wall insulation. From the point of view of functional requirements, aerated concrete products with low density, high strength, high heat insulation performance, and low dry shrinkage must be used. This requirement is essentially a deep-seated problem of aerated concrete quality. I have inspected related aerated concrete companies in Japan. Almost all of the aerated concrete exterior wall panels of these companies use grade 05 aerated concrete, and their standard strengths are above 4MPa (the actual ex-factory strengths are around 4.35MPa, and some have reached 4.5MPa), the performance requirements of aerated concrete for the production of slabs are higher than that of aerated concrete blocks. This requirement is not only to meet the building construction function of slabs, but also because aerated concrete is equipped with steel bars, this requirement is also to enhance aeration. Concrete and steel grip and prevent long-term corrosion of steel. Grade 06 or grade 07 aerated concrete has been used in floors or roofing panels, but it is not very common.

The aerated concrete blocks used for exterior walls in our country have a strength of 2.5 MPa or 3.5 MPa for grade 05 blocks. In order to prevent cracking, it is required that the blocks have a strength of 5 MPa. Therefore, they have to produce grade 06 or 07 aerated concrete. Most bulk density They are all in the range of 680 kg / m3 to 730 kg / m3, and some even reach the 08 level. This is inconsistent with the development direction of aerated concrete. There are three problems in the development of aerated concrete:

First, due to the multi-use of raw materials (especially high-quality quartz sand and high selling price of lime), production costs have greatly increased. In the long run, it is difficult to maintain.

The second is the production of 06 or 07 grade products, whose insulation performance is significantly reduced. Without increasing the wall thickness, it is actually difficult to meet the local building energy-saving design standards.

Third, the thickness of the wall must be increased in order to achieve energy conservation standards, resulting in increased construction costs. Therefore, only the production of aerated concrete with a density of 05 or below and a strength above 4 MPa can truly exert its excellent thermal insulation performance, meet local energy-saving standards, save raw materials, and reduce production and construction costs.

At present, most of China’s aerated concrete slabs are grade 05, 3.5 MPa concrete, which may not meet the requirements of frost resistance in cold and severe regions, and are prone to cracking and hollowing in hot summer and cold winter regions or hot summer and winter warm regions. , Peeling and other disadvantages, from the perspective of long-term use stability, it may be necessary to further increase its strength and reduce its dry shrinkage value.

Therefore, I suggest that the technical innovation focus of aerated concrete companies is to develop high-strength, low-density aerated concrete. For the production of aerated concrete external wall insulation boards, the strength of the bulk density of grade 05 must be above 4MPa, and its shrinkage value also needs to be Lowering, while strengthening the rust prevention treatment of steel bars. The high-quality development of aerated concrete is not just a matter of requiring a 4.8-meter cutting machine. Of course, according to the current situation of China’s aerated concrete plants, in order to develop low-density, high-strength aerated concrete, it is necessary to carry out a comprehensive system transformation from improving the quality of raw materials to the updating of process equipment technology.

Second, strictly control the quality of raw materials and strengthen raw material processing. Aerated concrete is a lightweight porous material with silicon dioxide and calcium oxide as the main raw materials, mixed with aeration agents, and hydrothermally synthesized at high temperature and pressure, so it contains silica and calcium oxide as the main ingredients Quality status has a great impact on product quality and performance. The silica content of foreign raw materials is about 95% to 96%, and the effective calcium oxide content in quicklime is as high as 93% to 95%. In China, the composition of fly ash in fly ash aerated concrete is not controlled. The silica content is generally 40% to 48%. The sand silica content in sand aerated concrete is mostly between 80% to 90%. Without cleaning, the mud content is high; the effective calcium oxide content in quicklime is only 55% to 60%, and the highest does not exceed 65%. Compared with foreign countries, the quality of aerated concrete raw materials in China is obviously not high, and the quality is unstable, which is an important reason for the inherent shortage of aerated concrete quality performance. Based on the results of a systematic test on the composition of aerated concrete raw materials, we recommend that existing aerated concrete plants make up their minds to improve the quality of raw materials and use as much as possible finely ground quicklime and quartz sand with high effective content of calcium oxide and silica. The aerated concrete sheet has higher quality performance requirements than the block. It is best to use fine lime with a calcium oxide content of 80% to 90%. The sand must be washed, ground, and mixed with a part of ground silica with high silica content. sand.

Third, focus on strengthening the technological transformation of equipment and increasing the curing temperature and pressure of autoclaves. The autoclaved temperature and pressure of aerated concrete in China are mostly 1.2 MPa to 1.3 MPa, and the corresponding temperature range is 190 ° C to 195 ° C. The hydration products generated under this temperature and pressure have not been fully crystallized. For many years, there is an inaccurate understanding in the aerated concrete industry. It is believed that as long as CSH hydration products are generated, regardless of the type, quantity and form of Tobmorite, it is considered to be aerated concrete with good performance. Low autoclave, in fact, at different temperatures and pressures, there are many hydrated products of tobomolite, which have colloidal, needle-like crystals, plate-like crystals, and plate-like crystals. These waters The types and quantities of chemical products in the mixture are different, and their effects on the performance of aerated concrete vary widely. In Germany and abroad, the autoclaved temperature and pressure of aerated concrete must not be lower than 1.5MPa and 203 ℃. According to the experimental research on physical and chemical properties, only under such a high pressure (temperature), the silica and calcium oxide in the material can fully perform the hydration reaction to produce C4S5H5 crystals (hard silicon calcium with good crystallinity and plate shape). Stone), and the quantity is sufficient, which constitutes a product with low shrinkage value and high strength. Therefore, in order to produce external wall insulation boards, existing aerated concrete enterprises in China must also upgrade the autoclave equipment with lower pressure at the same time. This is an important measure for aerated concrete enterprises to achieve real upgrading.

Two points need to be paid attention to: First, for aerated concrete-type lightweight materials, when evaluating its strength index, it must correspond to its associated density, instead of just indicating the strength regardless of the density. Second, due to the large difference in silica content between fly ash and quartz sand, coupled with the complex composition of quicklime in China, the effective content of calcium oxide is relatively low. According to experimental research, fly ash aerated concrete and sand aerated concrete The hydration products are not exactly the same. Under the same density, the product’s water absorption and drying shrinkage value are significantly different. Therefore, when developing fly ash aerated concrete slabs, we must pay more attention to the raw material composition and technical strictness. check.

Actively develop prefabricated building boards

In the past, we have repeatedly emphasized that wall material innovation is not a simple replacement of solid clay bricks. Its ultimate goal is to improve building functions, including the development of energy-efficient buildings, the promotion of technological progress in the construction industry, and the modernization of the construction industry. Prefabricated building is an important part of the industrialization of construction. It includes the industrialization of the production of building components and the assembly of construction and installation. Therefore, the development of prefabricated buildings has the advantages mainly reflected in two aspects: first, the production of building components including building boards, Adopting advanced industrialized production technology to ensure product quality performance and use functions, the company achieves the purpose of improving quality and efficiency, and saving raw materials. The second is to use advanced mechanized construction technology to assemble on site to greatly improve construction efficiency and reduce project cost. Both of these are indispensable, no matter from the development process of residential industrialization or construction industrialization in Europe, America or Japan.

From the current development of prefabricated buildings in China, the main prefabricated building components are slabs. Its installation and construction adopts mechanized assembly to develop rapidly, and the degree of construction mechanization has greatly improved, thereby improving construction efficiency, which has promoted the development of prefabricated buildings effect. However, in terms of slab production technology, most of the domestic are still produced in the factory by the traditional manual pouring concrete method. Some are coupled with automatic linkage technology in the process to reduce manual handling. Most of their products are solid reinforced concrete slabs. Sandwich insulation material or foam concrete between two layers of solid reinforced concrete slabs inside and outside. From the current application situation, these types of plate products reflect two problems. One is that the plates are too bulky and it is inconvenient to lift and install. Some construction sites have difficulty in construction due to the lack of large lifting equipment. The cost is greatly increased, and some are even at least 30% higher than that of masonry or cast-in-situ construction. The current problems in these two aspects restrict the rapid development of prefabricated buildings. In view of this situation, actively developing advanced production technology and new product structure types of prefabricated building panels to reduce the weight of the board, improve production efficiency, and save production costs may be an important part of the development of prefabricated buildings in China.

It is incumbent on wall material companies to develop advanced production technology and new structural types of fabricated building boards. In 1996, the “Notice on the Cooperation of Construction and Construction Materials Departments to Promote the Modernization of Residential Buildings” jointly issued by the former Ministry of Construction and the State Building Materials Bureau emphasized that with the breakthrough of wall materials to promote the modernization of the residential industry, it can be considered that the research and development of building board production Technology is a strength of the wall material industry. Over the years, many wall materials companies have laid a good technical foundation in the development of building wall panels, such as ceramsite concrete hollow slabs, aerated concrete slabs, GRC lightweight hollow slabs, industrial ash concrete Quality partition board, gypsum board, autoclaved fiber cement board, etc. Therefore, in terms of panel technology innovation, in addition to further improving the existing wall panel quality and process technology level, wall material companies can learn from the prestressed tensioning process technology currently popular in Europe, America and Japan to develop and develop prestressed concrete hollow panels. Including insulated composite hollow plates. Through extensive investigations abroad, this process technology not only greatly reduces the weight of the slab, but also improves the quality and performance of the slab product, and improves the strength and crack resistance of the slab concrete. Compared with ordinary reinforced concrete, it can save at least 20% of the concrete. % ～ 25%, saving steel by 25% ～ 40%, the hole ratio can be up to 45.8%, and the weight can be reduced by 30% ～ 40%. It can be used for interior and exterior wall panels, floor slabs, roof panels, and large-span floor slabs. Used in public buildings (schools, conference halls, halls) and industrial buildings. Because of its connection method, beard tendons are used for banding or welding, and the micro-expanding fast hard cement mortar is poured, which greatly enhances the integrity and stability of the house structure.

It needs to be emphasized here that some people may say that China’s production and application of prestressed concrete hollow slabs in the 1970s were generally unsuccessful, so they mistakenly believe that China’s development of prestressed concrete hollow slabs is not suitable for prefabricated buildings. This is a kind of misunderstanding. In foreign countries, regardless of the European and American countries or Japan, the prefabricated buildings of steel or reinforced concrete structures all use prestressed concrete plates as floor or wall panels, and they are even used as non-beam or column-type building structures. As for the unsuccessful application of prestressed concrete hollow slabs in the 1970s, it was because the production process technology was not perfect at that time. The prestressed steel bars were stretched on the movable formwork and the concrete was vibrated on the shaking table. The vibration caused the two forms of the formwork. The prestressed steel reinforcement pin at the end is loose, the prestress fails, and the quality of the plate fails to meet the functional requirements. In addition, the construction technology uses non-joint overlap, and the installation technology is backward. Therefore, this does not mean that the prestressed concrete hollow plate is not suitable. Prefabricated buildings, foreign prefabricated buildings use a large number of advanced prestressed concrete hollow slabs to fully prove this.

The development of prestressed reinforced concrete hollow building boards is an advanced technology for the production of building components. At present, there are two ways to develop this technology in China. One is that conditional enterprises can develop independently and build on the existing prestressed tensioning technology in China. , To carry out the experimental development of prestressed tensioned hollow slabs; the second is to introduce key foreign equipment technology and related auxiliary equipment to support domestically, based on the introduction of high-level localization. Both of these approaches are possible. The key is that companies must carefully analyze and research the actual needs of the local construction market and the development of prefabricated buildings, determine development goals and technical routes, and actively carry out experimental research to develop new types suitable for China’s national conditions. Prefabricated building board and its advanced production technology.

With the changes in China’s economic construction situation, although wall material innovation has encountered various challenges and difficulties, it is a major measure for China to implement a sustainable development strategy and an important part of the country’s promotion of a circular economy. There are many problems that need to be solved urgently, and there is a lot of content to carry out technological innovation. Therefore, the high-quality development of wall materials is the mission of wall materials companies in the new era, and it is also the only way for the sustainable development of enterprises. Both enterprises and industry managers must be brave. Fulfill responsibility, dare to take responsibility, strengthen confidence, not be intimidated by temporary difficulties, not be disturbed by various noises, and actively participate in high-quality development actions with correct values ​​and strong sense of responsibility and urgency. The original intention, perseverance, with perseverance and perseverance, to advance the cause of wall material innovation.

When it comes to the construction industry, it is inevitable to be associated with the dusty construction site. However, rebar, cement, and scaffolding, the familiar words in the traditional construction industry, have gradually drifted away, and today’s traditional buildings are undergoing a comprehensive transformation into prefabricated buildings.

Different from traditional construction methods, prefabricated buildings will assemble a large number of prefabricated components at the factory link. The construction process is similar to “building blocks”, and construction work will be completed by building prefabricated components. The advantage of this construction method is that it can improve the quality of the project, shorten the construction period, and also reduce environmental pollution.

After years of intensive cultivation, Broad Living, which was established in 2006, has developed into China’s largest PC component manufacturer and PC production equipment manufacturer, occupying market shares of 13.0% and 38.3%, respectively. Its business involves the midstream and upstream of the industry and is in the leading position in the industry .

The domestic assembly and construction market is still a blue ocean

Favorable policies promote the rapid growth of assembly buildings. The “Thirteenth Five-Year Plan” Prefabricated Building Action Plan launched by the Ministry of Housing and Urban-Rural Development of China in February 2017 clearly stated that by 2020, the proportion of prefabricated buildings in the country will exceed 15% of new buildings and 30% by 2025. Following it is another trillion-level market. According to estimates by the Institute of Foresight Industry, it is estimated that by 2025, the scale of China’s fabricated building market will reach more than 1.5 trillion yuan.

According to the data, Broad Living Group mainly provides overall solutions for China’s construction industrialization, including globalization, large-scale, professional and intelligent prefabricated building manufacturing and services. Its business scope mainly focuses on three major sections, namely PC component manufacturing, PC production equipment manufacturing and construction general contracting. As of the end of April 2019, revenue from PC component manufacturing and PC production equipment manufacturing business accounted for 88% of the total revenue during the period.

Relying on the first-class manufacturing capabilities of prefabricated buildings, Yuanda Living Industry opened the door to the capital market, officially listed on the Hong Kong Stock Exchange on November 6, and obtained over-subscription. The issue price is HK $ 9.68 per share, about 122 million shares are sold, and the raised funds do not exceed HK $ 1,521 million. The funds are mainly used to develop the PC component manufacturing business and intelligent equipment business.

According to the prospectus, as of April 30, 2019, Broad Living has 15 wholly-owned PC factories and has contracted to invest in 85 joint factories. Covering 100% of China’s cities with GDP exceeding 1 trillion yuan in 2018 and 65% of cities with GDP exceeding 100 billion yuan in 2018.

In addition to policy blessings and the industry’s leading position, the steady growth of Broad Life has also strengthened investor confidence. The prospectus shows that the revenue of Broad Living has shown a steady growth trend in the past three years. From 2016 to 2018, Broad Living has achieved a compound annual growth rate of 16.5%; a gross profit compound annual growth rate of 9.7%; and an annual profit of 198 million yuan. , 168 million yuan 466 million yuan.

Technology helps modernize the construction industry

Nowadays, the construction industry is being optimized and upgraded under the promotion of digitalization. Broad Living is keeping up with the development trend. It is building a digital system covering the entire construction industry chain and is committed to achieving digital design, digital factories and digital construction sites.

According to Zhang Jian, Chairman of Broad Life, “Broad Life is committed to digitally defining the construction industry chain, replacing people with machines, building houses like cars, and upgrading manual, discrete traditional construction industries to intensive, Efficient modern manufacturing. ”

Broad Living has exported and implemented the concept of building modernization. It is understood that the current all-round cooperation targets of Broad Living include real estate developers, builders, design institutes and government platform companies, among which Vanke, Country Garden, China Construction, China Academy of Building Research, Shaanxi Energy Group, etc. are influential Businesses and institutions.

Zhongtai International said that PC component business revenue of Broad Living is expected to continue to grow in the next few years. Broad Living has the largest market share in the country, and has a complete technical system, brand premium and customer advantages. It has a solid market leadership position and a clear future competitive advantage.

Broad Living has achieved a leapfrog development with a steady and steady attitude, standing on the guise of modernization of the construction industry, while helping the traditional construction industry to take on a new look, and has become an important force to promote the real economy to high-quality development.

Talking about the development plan for the next five years, Tang Fen, Executive Director and General Manager of Broad Living, stated that the penetration rate of prefabricated buildings in the Chinese market is less than 5%, while Germany has reached 32%, Northern Europe has more than 40%, and Singapore has more than 70%. The future development space is huge.

In the future, Broad Living will continue to cultivate the domestic market. It is expected that 67 joint factories will be established, covering 66 cities with a GDP of more than 100 billion yuan. In addition, Broad Living will expand its journey overseas, and 20% of the funds raised from the IPO will also be used to open up overseas markets and establish technology and production centers for overseas markets. At the same time, it will decide whether to open a factory overseas according to the development of the overseas market.

It is understood that Broad’s overseas development strategy “divide into two roads”: to promote and export fully-assembled villa products to some developed countries and regions in Europe, North America and the Persian Gulf; all the way to countries along the “Belt and Road” And other developing countries, exporting a complete set of prefabricated building products and construction management, technology, equipment and services to develop social housing.

According to Tang Fen, in the future, the Broad Labor Union will continue to focus on five major strategies, namely, continue to invest in PC factories, upgrade digital platforms, continue to focus on strategic customers, continue to implement the “Broad Alliance” plan to expand overseas markets.