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AAC Products & Applications

2020-10-26/in Industry information /by admin

Autoclaved aerated concrete

AAC stands for highly efficient thermal insulation, optimal fire protection, and masonry with excellent load-bearing abilities. Lime, sand, cement, and water – mineral and natural raw materials – form the main ingredients of AAC. A large amount of closed cells with stagnant air give the panels and blocks unique properties and processing advantages. This allows to build fast, flexible and affordable. and the products can therefore be used in a diverse range of applications for both new construction and renovation projects.

Large-format prefabricated AAC panels are used in large-scale business construction projects, such as logistics centers, warehouses, and production facilities, as well as event centers and sports halls.

For house construction, commercial and industrial buildings

AAC is not only used to construct inner leaves of cavity walls and partitioning walls but also internal, external and fire walls in both load-bearing and non load-bearing designs. AAC therefore is known as being efficient for both house construction and for commercial and industrial buildings.

High construction speed

In addition to its versatility, AAC blocks or panels are characterised by its ease of working and construction. This results in a relatively high construction speed which can deliver cost savings, particularly in high-volume projects.

Labour-friendly product

The material and product properties make AAC suitable for both new-build projects and for renovation works. The light weight and the ease of construction especially play an important role in the field of renovation.

The concrete construction method of gypsum mortar plastering

2020-10-23/in Industry information /by admin

As a new product to replace cement mortar, gypsum mortar plastering has the strength of traditional cement, and is more environmentally friendly and durable than cement, with strong adhesion, not prone to chalking, cracking, hollowing, etc., and is easier to use Cost is lower. So what is the construction process of gypsum mortar plastering? Let’s take a look at the construction method of gypsum mortar plastering.

1. Primary treatment

(1) Before construction, clean up dust, oil stains, dirt, spacers and other impurities on the surface of the base layer in advance;

(2) The concave and convex parts and openings on the grassroots level should be handled clearly and kept flat and firm;

(3) The gap between the door and window frame and the wall should be embedded and dense according to the doors and windows of various materials;

(4) Moisten the base layer with water in advance, and pay attention to no clear water on the surface before plastering;

(5) Start to make corners around the walls, doors, windows and pillars.

2. Construction technology

(1) Determine the plastering sequence, first up and down, starting from the doorway, and working continuously on the entire wall;

(2) Ordinary concrete ceiling can be plastered with plastering gypsum once;

(3) Set signs or bars according to the flatness of the wall base; the distance of the vertical bars should be 1.2-1.5 meters, and the width of the bars should be 0.03-0.05 meters;

(4) If the plastering thickness is less than 0.05 meters, you can directly use gypsum mortar for plastering. If the thickness is more than 0.05 meters, you can directly use the light bottom layer for primer, and then use the surface layer to plaster the plaster;

(5) Apply gypsum mortar to the base layer according to the design thickness, and then use the H-shaped ruler and scraper to stick to the standard bar, and scrape the flat layer of dust up and down;

(6) Calender with a trowel, and then use a ruler to check the flatness of the wall;

(7) After plastering, pay special attention to timely cleaning the relevant positions;

(8) When plastering with plaster and mortar, clean up the floor ash, pay attention to good ventilation after calendering, and avoid washing the finish with water. After the construction, remember to clean the plastering tools in time.

What are the precautions for the construction of autoclaved aerated concrete blocks

2020-10-19/in Industry information /by admin

In the current wall masonry technology, the new wall materials mainly use autoclaved aerated concrete blocks, which has been widely used.

Autoclaved aerated concrete blocks are mainly used in the construction of frame structures. At this stage, they have replaced the clay solid brickwork materials. This kind of materials uses cement, lime, gypsum, and river sand as the original materials, foamed with aluminum powder and formed , Autoclave and other processes to make a microporous block wall. This kind of new technology has stricter quality requirements than the previous concrete block craftsmanship, and requires a more in-depth discussion of its quality control methods and points.

1. Selection of autoclaved aerated concrete blocks

Cracks are a common quality problem of autoclaved aerated concrete block walls, which have a lot to do with the shortening of the period itself. Therefore, it is necessary to select blocks with a relatively small boring shortening value. According to common sense, the higher the density of the raw materials used, the smaller the boring shortening value. When considering this condition, the thermal conductivity of the block also needs to be considered.

When selecting, take into account the differences in raw materials and production skills, and the boring shortening value of products from different manufacturers is different. In order to ensure production quality, it is best to choose products with sophisticated skills, stable quality and better maintenance when purchasing.

2. The control method of construction skills

(1) Make relevant layout diagrams of blocks

The layout plan of the aerated concrete blocks is not planned before construction, resulting in the overlap length of the upper and lower blocks being short in some parts, and the masonry mortar used in the infill wall has a low strength level. Reinforcing steel mesh will shorten the wall and cause axial tension, which will show straight cracks along the tooth gap.

Therefore, before the wall is built, it is necessary to make a layout drawing according to the characteristics of the engineering drawing, according to its requirements, according to the modulus and size of the blocks. In the 40-60 days after the block leaves the factory, the volume will not change before the wall can be installed. It is also necessary to consider the upper and lower joints of the block. For this, it is necessary to make the length of the overlap greater than the length of the block. 1/3, greater than 150mm. If the lap length of the 3 skins in the same part cannot meet the above requirements, it is necessary to place the 26-month steel bar in the horizontal gap, and the length of both ends of the steel bar is required to exceed the straight seam line by 350mm.

(2) Set up relevant concrete guide walls

Regarding the problem of setting a concrete guide wall at the bottom of the wall:

a. The walls of the ground floor construction (except the basement) all require the installation of concrete walls. Due to the strength of the foot of the wall and the impermeability of the wall, the durability of the house is higher;

b. For multi-storey construction (non-high-rise construction), concrete guide walls should also be installed on the second floor or above, which helps to keep the same elevation and can effectively waterproof during construction;

c. For high-rise construction, the concrete guide wall will increase the weight of the wall, which is not conducive to the stability of the construction structure, so guide walls are not allowed.

(3) The influence of water content on the upper wall of the block

The water content of the block has a serious impact on the upper wall: Take aerated concrete block as an example, it has a large porosity and can absorb a lot of water.

If during construction, the block is not allowed to fully absorb water and wet before plastering, it will cause it to absorb a lot of water from the plastering mortar, which will prevent the hydration of the mortar and cause the strength of the plastering mortar to fail.

Before building the wall, it is necessary to make the blocks absorb water to fully wet the surface. In addition, if the water content of the block is too large, it will cause the block to lose water and reduce its volume, showing cracks and gaps on the wall.

Therefore, the water content of the block should not exceed 15%. Special attention should be paid to the concealment of the block when working in rain. When the rainfall is more than light rain, the masonry shall be stopped and the masonry shall be concealed to prevent rainwater from intruding. The blocks shall enter the construction site 7 days in advance and be placed indoors, so that the moisture content of the blocks can reach the outdoor atmosphere. Approximately balance the exterior wall wetted by rainwater, and the wall plastering should be performed after the moisture content of the exterior wall is approximately balanced with the outdoor atmosphere.

(4)Requirements for fullness of mortar

In construction, the fullness of the mortar also has certain requirements. The fullness of the mortar joint of the masonry is controlled above 80%, and the thickness of the mortar joint is often 812mm as the standard. If the adhesive is used for dry operation, the thickness of the mortar joint should be 35mm as the standard. When building each leather block, all the mortar joints need to be compacted with the original slurry to make the concave joints. Should be 13mm.

When carrying out the overall masonry operation, it is necessary to use the “extrusion method”, “grouting method” and other methods to make the mortar of the vertical joint plump. It is necessary to carry out the masonry and joint repair and joint work together. The more important treatment is the frame and The joints between the blocks.

After the blocks on the upper layer are processed, the secondary jointing of the interlayer jointing is required. After the wall structure is stabilized, red bricks are required to be used for oblique masonry, and the frame beams and blocks shall be tightly supported. The gap in between can also be filled with fine stone concrete (containing expansion agent).

Installing Floor & Roof Panels

2020-10-15/in Industry information /by admin

There are a full range of tools that are specially designed to assist in installing floor panels and increase productivity at the job site. AAC masonry installation will also require the following standard masonry tools.

Step 1

Unload bundles of panels in proper manner using approved unloading gear. If panels must be stored, place them in a clean area without standing water that is close to where work will begin.

Step 2

Layout bearing lines using a tape measure, layout and chalk the bearing (bearing area is represented by red shaded areas 2 ½” minimum to 3” maximum) lines on top of walls using detail drawings approved for construction. Make sure all bearing, top-of-wall surfaces are level.

Step 3

Attach panel lifting gear. Place panels in a flat position with topside up. Attach approved panel lifting gear (floor clamp) to the first panel. Be sure to observe manufacturer’s proper attachment procedures and safety guidelines.

Step 4

The first-floor panel is lifted, placed and adjusted into exact alignment along bearing lines. A person is required to steady and guide each end of the panel. Note the edge profiling and mark number of the panel and install accordingly. Maintain minimum bearing according to drawings. Bearing pads should be placed on top of wall where the bearing of the floor panel will occur. Start the first panel with the groove facing the direction you will be laying the panels in or you will not be able to release the clamp when installing the next panel.

Step 5

Repeat for remaining panels. Lay the remaining panels ensuring that each one is seated firmly beside the preceding one.

Step 6

Placing last panel. The correct lifting gear will greatly assist placement of the last panel. Special procedures may be required if other lifting devices are used (i.e. slings or ropes).

Future development prospect of prefabricated buildings

2020-10-14/in Industry information /by admin

Nowadays, in the construction industry, various new concepts and new models are constantly emerging, such as organic integration of industrial chain, parallel assembly engineering, low-energy prefabrication, green assembly, networked construction and virtual optional assembly. Prefab building is the house built by industrial production method. It is the house built by prefabricating part or all components of the house in the factory, then transporting them to the construction site and assembling the components through reliable connection. It is called industrial house or industrial house in Europe, America and Japan. It has the advantages of high efficiency, high precision, high quality, high degree of industrialization, high degree of standardization, high seismic performance of buildings, high energy-saving performance, large usable area, etc.

Compared with traditional cast-in-place reinforced concrete and masonry buildings, prefabricated buildings adopt the construction method that produces building components including beams, slabs, columns and external walls in the factory, and transports them to the site after maintenance and acceptance. It breaks the traditional construction method of “Qin Brick, Han tile” for thousands of years, and completely subverts traditional architecture by “standardization” of building components and “industrialization” of construction methods.

The improvement of construction method also brings the improvement of operation mode and construction concept. In terms of operation mode, the traditional construction phenomenon of “people go with the project and materials are piled everywhere” is broken. Instead, the components and components used in the construction are basically completed in the factory. The construction site does not need too many workers and equipment, and it also reduces the “rushing around”. In the construction concept, it stresses the quality and safety in the first place, to achieve saving and fast, “saving” to save costs; “Fast” should pursue construction speed. Its appearance makes the industrialization of buildings develop towards the direction of green, energy saving and environmental protection gradually.

In the future, the construction system and industrial system of prefabricated buildings in the world will go beyond the scope of the existing enterprise mode and industrial form. As one of the products of the transformation of the production mode of the construction industry, prefabricated buildings will become the next outlet of the construction industry.

Lightweight gypsum plaster has replaced traditional cement mortar to become a new favorite for building interior wall plaster

2020-10-12/in Industry information /by admin

With the rapid development of the current era, all walks of life in electronics, Internet and architecture are moving forward with the trend of rapid development. It seems that after the development of our country is certain, we will advance like a straight line. Today, we will talk about the lightweight gypsum plaster used in the plastering of the interior walls of buildings.

First of all, let’s take a look at the traditional process product of interior wall plastering — cement mortar. Cement mortar has been used to a large extent in the past development, but in recent years, various problems frequently occur in cement mortar plastering, which makes the majority of developers back away. Due to cement mortar plaster often appear empty drum, crack, off powder led to the interior walls of the unqualified phenomenon, is likely to make a very good moment into a jerry-built projects construction, and the root cause of these phenomena appear unexpectedly is small interior walls caused by the use of traditional cement mortar plastering, and these defects is the common fault of the cement mortar exist, that is to say the situation cannot be solved, due to long time people have to accept the cruel reality, before decorate use interface agent or glue to make up for the defects, but also is take temporary solution not effect a permanent cure, Nowadays, the emergence of a new building material completely overturns the whole structure — the emergence of light plaster plaster and plaster mortar is indeed a qualitative leap. It makes up for all the shortcomings of cement mortar, and on this basis, there are many new functions.

Lightweight gypsum plaster construction craft simple easy to operate, its main raw material for the desulfurization gypsum, and desulfurization gypsum is power plant itself, waste output, light plaster gypsum will have further processing and waste power plant of finished goods, contributing to society and the construction industry a force, plastering gypsum slurry itself have heat preservation, heat insulation, environmental protection, simple construction, light weight and other characteristics, and the emergence of new building materials of lightweight plastering gypsum, now let the market more active, lightweight plastering gypsum and cement mortar is a heaven and an underground, Light plaster gypsum can batch of 160 square meters of area per ton (thickness calculated according to one centimeter), so light product developers not only save cost, construction personnel can be more out of the area, double the amount of gypsum plaster daub, more green environmental protection, is a new kind of building materials in the true sense, is a big important trend of the development of interior wall plastering engineering.

Now lightweight gypsum plaster domestic brands are not many, but can make high quality is less,including the APEX, already after years of repeated research and exploration, lightweight gypsum plastering mortar has become more mature and successful, sincerely hope that the general partner of project can be used to great products at an early date.

What are the advantages of AAC panel engineering application?

2020-09-28/in Industry information /by admin

AAC panel is a new type of construction building material, which is widely used for its light weight, thermal insulation, fire resistance, sound insulation and other advantages. So, in the actual construction process, what are the specific advantages of AAC panel engineering application? Here is a brief introduction for everyone.

1. Reduce wet work on the construction site and increase construction efficiency

The use of blocks requires additional structural columns and seismic waist beams, and the construction of a single wall requires more than three days to complete. And the block wall needs to be plastered on both sides to meet the flatness requirements, and the wall plastering is completed, it takes more than 30 days to dry, and the coating and painting process can be constructed after drying. Lightweight aerated concrete wall panels are measured on-site and processed to a fixed length. The construction of a single-sided wall can be completed within 24 hours. The wall panel is dry construction, and there is no on-site wet operation. The flatness error of the wall after installation is not more than 3mm, the wall does not need to be plastered, and the construction process of wall paint can be entered after the construction is completed.

2. Save project cost

(1) Compared with 200mm thick aerated concrete block walls, AAC panels eliminate the need for structural columns and waist beams in the block walls to reduce the amount of steel and concrete; the walls do not need to be plastered with nets, but are scraped directly. Compared with the block partition wall, the project cost can be reduced by 15-25 yuan per square meter.

(2) Compared with aerated concrete block walls, AAC panels do not need to be equipped with structural columns and concrete waist beams, and the cubic dry bulk density of lightweight wall panels does not exceed 650kg (conservative design value is 850 kg per cubic meter); aerated concrete blocks There are masonry mortar, concrete waist beams, structural columns and plastering mortar on both sides (concrete bulk density is 2400 kg per cubic meter, cement mortar bulk density is 2000 kg per cubic meter). Under normal conditions, the combined cubic bulk density is about 1300 -1400kg. The use of this lightweight panel can better reduce the load-bearing load of the structure; at the design stage, the steel content can be saved by about 4-6kg per square meter (that is, about 20-30 yuan per square meter) according to the calculation of the plate weight and the structural load;

(3) It can be seen from the above two items that because the overall load of the wall is greatly reduced, the structural beams and foundations of the project can also be reduced in cross-section size and concrete markings, and even the buried depth and excavation depth of the foundation can be reduced. The square meter is reduced again by about 15-25 yuan;

(4) Wall reform fund: aerated concrete block walls, wall reform funds generally return 70-80%; with AAC panels, wall reform funds are charged at 10 yuan per square meter of building area, and wall panels can save 2-3 per square meter. Yuan cost.

AAC panels can increase construction efficiency, shorten the construction period, and more importantly, save about 80 yuan per square meter of project cost. So the practical application value is very high. The above is the advantages of AAC panel engineering application, I hope to help you have a more detailed understanding of AAC panels.

For more information about the advantages of AAC panels, please click to visit:

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Ultra-low energy consumption is becoming the development trend of global building energy saving

2020-09-21/in Industry information /by admin

Ultra-low energy consumption building is a rapidly developing and comfortable building in the world in recent years. Under the background of increasingly serious energy crisis and environmental pollution, it is an important way to deal with climate change, energy saving and emission reduction, and represents the development direction of building energy saving in the world. Global climate change is the problem and development challenge facing human beings in the world and in the long future. Ultra-low energy consumption building is one of the important fields of energy saving and emission reduction and dealing with climate change. International building energy-saving technology has improved very rapidly, from low-energy buildings to passive ultra-low-energy buildings to capacity buildings.

Developed countries have proposed development goals for near-zero energy consumption. There are currently 3339 zero-energy projects in North America, involving 6177 units of users. The United States issued “Environmental, Energy, and Economically Beneficial Federal Measures” in October 2009, requiring all federal buildings planned to be built or leased to be designed to achieve zero energy consumption from 2020 onwards, so that the buildings Materials can reach net zero energy consumption in 2030. The purchase or lease of federal government assets requires zero energy consumption as one of the assessment indicators. By 2040, 50% of commercial buildings will reach zero energy consumption; by 2050, all US commercial buildings will reach net zero energy consumption.

The European Union enacted a building energy consumption directive in 2002. The building energy consumption directive revised in 2010 proposed that all new buildings on the European continent must reach a near zero energy consumption level by 2020. Currently, more than half of the countries in Europe are implementing this energy directive, and each has its own sub-target. Among them, Germany proposes that the buildings owned or used by government departments will reach nearly zero energy consumption from 2019, new buildings will reach nearly zero energy consumption from 2021, and all existing buildings will reach nearly zero energy consumption by 2050. The UK requires new buildings to reach zero energy consumption after 2016, and zero energy consumption for public buildings after 2019.

In East Asia, Japan has formulated a policy roadmap for building energy efficiency from benchmark buildings, ultra-low energy consumption, near zero energy consumption to zero energy consumption by 2030. In 2020, new public buildings will achieve nearly zero energy consumption, and in 2030, all new buildings will be nearly zero energy buildings. Korea promulgated the “Action Plan for Zero Energy Buildings to Address Climate Change” in July 2014, formulated corresponding promotion policies and incentive measures, and proposed to achieve the goal of zero energy buildings by 2025.

Obviously, in the past 10 years, passive ultra-low energy consumption green buildings, as a kind of energy-saving buildings with low energy consumption and high comfort, have been determined by most countries and organizations as residential standards or the direction of future urban development planning, becoming an international energy-saving The trends and trends of architecture have received high attention and rapid application in all parts of the world.

China’s building energy conservation started in the 1980s. The “Civil Building Energy Efficiency Design Standards” promulgated by the original Ministry of Construction in 1986 required new residential buildings to save energy by 30% on the basis of the local general design energy consumption level in 1980, opening a new stage of building energy efficiency in China. In recent years, as climate and environmental issues have become increasingly prominent, the public’s requirements for the quality of the living environment have gradually increased. The Ministry of Housing and Urban-Rural Development, which is responsible for building energy saving, has played a huge role in green buildings and passive ultra-low energy green buildings that can play a huge role in building energy saving. Attach great importance to the promotion of combined products.

At present, ultra-low energy consumption green buildings are being developed in an orderly manner. My country’s building energy conservation has become a consensus. The ultra-low energy consumption standards represented by prefabricated buildings will become the mainstream trend of the construction industry. The overall social environment and technical conditions are also very beneficial to the in-depth development of energy conservation. To this end, the construction industry needs collective efforts to accelerate the transformation of its development mode, and rely on its own technological progress and technological innovation. Ultra-low energy consumption buildings are bound to be fully developed in my country and change the status quo of the entire construction industry.

Develop Low-energy Buildings and Promote New Building Materials

2020-09-14/in Industry information /by admin

EU stipulated that starting from 2020, all newly-built houses in the 27 EU countries that fail to meet the Passive House standard will not be issued with construction permits. In Europe, low energy consumption passive houses are increasing at an annual rate of 8%. As of January 2020, the number of certified Passive Houses worldwide has exceeded 25,000. The total construction area is nearly 2,350,000 square meters.

The entire structural system of the low-energy building is in the protective layer, protected from the erosion of wind, frost, rain, and snow. The temperature is basically between 20～26℃ throughout the year, which can greatly reduce the building loss.

(1) Get rid of the dependence on fossil energy, realize building energy saving and emission reduction

It allows heating to completely get rid of the dependence on fossil energy. A low-energy building can save at least 90% of energy compared with ordinary buildings.

(2) Low-energy buildings can be warm as spring without heating in winter

Low-energy buildings can provide people with a warm indoor environment in winter without heating facilities and maintain the indoor temperature above 20°C.

(3) It relieves the peak pressure of electricity consumption in summer and alleviates the urban heat island effect

If ordinary buildings that generate heat islands are transformed into low-energy buildings, the heat islands will be eliminated. In this way, as urban low-energy buildings gradually replace ordinary buildings, the urban summer temperature will also drop.

(4) It promotes the upgrading and development of the construction and building materials industry

Low energy buildings have extremely high requirements for construction standards and building materials, which will promote the provision of a competitive market environment and promote industrial progress. At the same time, result-oriented inspections force workers to perform delicate construction at every step.

(5) Low-energy buildings provide people with a healthy and safe indoor environment

Low-energy buildings can effectively isolate outdoor haze, carbon dioxide, carbon dioxide, Ozone, even mold spores, air can only enter the room through a fresh air system with efficient heat recovery. The fresh air system can control the in and out of water vapor to maintain a comfortable temperature and humidity.

(6) It provides a clear theory of building energy efficiency, making building energy efficiency simple and easy

The envelope structure standard of low-energy buildings is no thermal bridge and no air leakage. This feature makes the calculation method of building energy consumption very clear.

Therefore, the development oflow energy buildings is in line with the trend and is the only way for the development of building energy efficiency. The in-depth promotion of low energy consumption buildings and the creation of a healthy, comfortable and livable environment are of great significance to improving the level of building energy conservation, promoting industry transformation and upgrading, and environmental protection. New building materials such as autoclaved aerated concrete just meet the requirements of low-energy buildings, and significantly reduce energy consumption in production, construction, and application.

Science Popularizing：Foreign experience of prefabricated building for reference

2020-09-07/in Industry information /by admin

Prefabricated buildings are taking over the market day by day. One of the driving forces behind prefabricated buildings is the government’s determination to build an ecological and civilized environment. Although assembly-style development is still a long way off for China’s construction industry, it is not a dark road. Many foreign countries for the assembly of the long development process and their achievements can be used as an important reference for the development of our domestic assembly building. So today I’d like to share with you the features, achievements and advanced ideas of prefab architecture from several foreign countries.

Japan

Japan introduced the concept of prefab housing as early as 1968. Because Japan is in an earthquake zone, prefab houses have high requirements for earthquake resistance: prefab concrete damping and isolation technology, and government legislation to ensure the quality of precast concrete construction. Today, about 41 percent of prefabricated buildings in Japan are made of wood, 38 percent of steel and 20 percent of reinforced concrete.

We can see from the development of Japan, the participation of the government guarantees the prefabricated construction and promote the positive development: clear goals (every five years has residential construction five-year plan) to ensure the improvement and development of housing industrialization, the strict legislation to ensure the quality of the building on the market, the specialized agencies to promote (” transport ministry residential residential class wooden residential revitalization of the room “) guarantees the industry standardization and advanced. At the same time, da Group actively participates in leading the technical development in the field of prefab housing without promulgating enterprise norms and process standards, which provides a benchmark basis for the prefab industry, thus leading the development of professional companies and forming a complete industrial chain for common development.

German

Germany has always been a rigorous and serious country in our cognition. Industrialization can spread to almost all their industries, and the construction industry is no exception. They constantly pursue process standardization and operation mechanization, and try every means to improve efficiency in all fields. And they have been among the most cutting-edge countries in PC prefabricated product development and material research. Today, Germany has the fastest reduction in building energy consumption in the world, and in recent years it has proposed to develop zero-energy passive buildings. From large energy savings to passive buildings, Germany has adopted prefab homes, which are fully integrated with energy efficiency standards. Prefabricated buildings in Germany are mainly steel and wood structures. At the same time, based on the strong research support from universities, research institutions and enterprises, Germany has formed a strong industrial chain of prefabricated buildings, and a collaborative supporting system of architecture, structure, water, heating and electricity. In addition, due to the close cooperation between construction enterprises and machinery and equipment suppliers, Germany has advanced machinery and equipment, materials and logistics, which has got rid of the limitation of fixed module size and to a large extent met the requirements of industrialization.

From the German assembly-style development, we can see the importance of the establishment of industry standards and specifications. German technical specifications first meet the general building comprehensive technical requirements, but also can meet the requirements in production and installation. In addition, we also need to encourage the research of different types of prefabricated building technology system, so as to gradually form a more applicable general technology system and scale production, thus achieving the purpose of improving efficiency and reducing cost.

United States

According to Professor Kevin Wolfe, vice President of the International Federation of Building Authorities (ICBO), “the United States has established a mature market for assembled residential construction (industrial construction), with the standardization, serialization and commercialization of assembled residential components and components approaching 100%.” Through the product catalog, users can buy the products they need, these components have good structural performance, great versatility, and easy to mechanized production. This is thanks to America’s distinctive assembly-line industry. American housing is mainly prefabricated housing with low-rise steel and wood structure, focusing on the comfort and individuality of the residence. The United States does not have the phenomenon of rough housing delivery, can achieve a comprehensive prefabricated decoration.

As we can see, the construction industry in the United States can realize complete marketization, and the corresponding codes and standards (BL quality certification system) are complete, with a high degree of standardization. In addition, the builders of large companies will frequently merge or establish partnerships, purchase large quantities of residential units, and achieve scale effect to reduce costs by expanding scale.