In order to protect land resources, the Ministry of Construction has identified 170 large and medium-sized cities across the country to phase out the use of clay bricks within a limited time, and set June 30, 2003 as the deadline. Qinhuangdao Yaohua Jian'an Engineering Co., Ltd. seized the opportunity to grasp the situation and was committed to the development and construction of new energy-saving houses. Since 1998, the construction of shear wall construction technology has been completed. In 2000, the first energy-saving demonstration area with a construction area of ​​100,000 square meters was built in Qinhuangdao City. The district has adopted 5 advanced construction technologies such as shear wall structure, exterior wall interior insulation, exterior wall insulation, floor radiation heating, and 8 new energy-saving materials such as steel-plastic composite pipe, UBR toilet, and composite polystyrene board. The building has excellent energy-saving, land-saving and seismic performance. After being tested by the competent department of construction, the building has reached the national second-phase energy-saving target of 50% in advance. The community has been rated as “the new technology application demonstration project in the Hebei construction industryâ€.
For the wall insulation technology that has been mastered in the construction of the demonstration area, in 2001 the company also organized related engineering and technical personnel to conduct research on the composite insulation wall. After repeated arguments. Three types of insulation materials were chosen for the experiment. Two of the insulation materials are commonly used double-sided steel wire mesh polystyrene insulation boards and single-faced steel mesh polystyrene insulation boards, while the other is an exploratory selection of non-network. Polystyrene plate, and the cast-in-place concrete shear wall and polystyrene board were cast at the same time to form a composite wall, that is, self-adhesion of concrete and polystyrene board. Using the above three types of external wall insulation materials and construction methods to conduct monolithic building composite wall performance experiments, made a breakthrough. The results show that the self-adhesive process has the advantages of simple construction process, easy operation, etc. In particular, the non-woven polystyrene board has the obvious advantages that the other two kinds of insulation materials do not have. The first is the strong insulation performance, which is tested because of the other two kinds of insulation materials inside. There are metal grids, there are heat loss due to the effect of the metal mesh cold bridge, in which the double-sided steel grid polystyrene insulation board and the net insulation board lost more than 20%, single-sided steel mesh polystyrene insulation The plate heat loss is more than 8%, and there is no heat dissipation problem caused by this factor in the non-web polyphenylene plate; second, the cost is low, and the current market price is less than 65% of the average price of the non-network polyphenylene plate compared with the other two materials; The third is to overcome the existence of the other two materials, and it is also a common problem of wall cracks in the field of building insulation. So far, Qinhuangdao Yaohua Jian'an Engineering Co., Ltd. has pioneered the new technology of "shear wall external thermal insulation composite wall" formed by once pouring of polystyrene board and cast-in-situ concrete wall. The above properties were tested by the Tianjin University Civil Engineering Inspection Center to fully meet the quality requirements of the construction project. In December 2001 and February 2002, the technology was formally accepted by the State Intellectual Property Office and patented for inventions and utility models.
In order to further reduce the construction cost, the company also adopted another patented technology of its own, “Disassembling Bamboo Plywood Support and Reinforcement System†when building a model building. Bamboo formwork is one of the new materials promoted by the Ministry of Construction. It has a low overall cost and a short production cycle. However, the large-scale bamboo formwork on the market suffers from problems such as complex template cards, large fixed spacing, and lax fixing, and the template is easily deformed and has low reusability, which results in degraded wall quality and increased costs due to repair defects. In order to overcome the defects in the use of bamboo formwork, the company decided to change the large formwork to a small formwork and to support its own design of special fixtures and other fixtures to form its own complete set of loose-leaf bamboo plywood formwork support reinforcement system. In the construction, firstly, the steel bars are tied together according to the design thickness of the wall, and the formwork is supported on both sides of the reinforcing bar. The template is used to form large pieces together with special fixtures, then the concrete is poured, the mold is finally removed, and the wall surface is molded once. This type of wall surface is smooth, no plastering, to ensure that the thickness of 140mm wall thickness error between 0 ~ 2mm. This patented technology template has the advantages of simple processing, short production cycle, low cost, no need of large-scale cranes for construction, convenient handling, labor-saving and quick support.
The energy-saving model building built with a composite heat-insulating wall and bamboo plywood support reinforcement system is warm in winter and cool in summer. Under the same conditions, the temperature in summer is 1°C~2°C lower than other walls and 2°C～3°C in winter, saving heating and cooling costs. This technology brought about a revolution in building walls and promoted the development of building energy-saving technologies.
For the wall insulation technology that has been mastered in the construction of the demonstration area, in 2001 the company also organized related engineering and technical personnel to conduct research on the composite insulation wall. After repeated arguments. Three types of insulation materials were chosen for the experiment. Two of the insulation materials are commonly used double-sided steel wire mesh polystyrene insulation boards and single-faced steel mesh polystyrene insulation boards, while the other is an exploratory selection of non-network. Polystyrene plate, and the cast-in-place concrete shear wall and polystyrene board were cast at the same time to form a composite wall, that is, self-adhesion of concrete and polystyrene board. Using the above three types of external wall insulation materials and construction methods to conduct monolithic building composite wall performance experiments, made a breakthrough. The results show that the self-adhesive process has the advantages of simple construction process, easy operation, etc. In particular, the non-woven polystyrene board has the obvious advantages that the other two kinds of insulation materials do not have. The first is the strong insulation performance, which is tested because of the other two kinds of insulation materials inside. There are metal grids, there are heat loss due to the effect of the metal mesh cold bridge, in which the double-sided steel grid polystyrene insulation board and the net insulation board lost more than 20%, single-sided steel mesh polystyrene insulation The plate heat loss is more than 8%, and there is no heat dissipation problem caused by this factor in the non-web polyphenylene plate; second, the cost is low, and the current market price is less than 65% of the average price of the non-network polyphenylene plate compared with the other two materials; The third is to overcome the existence of the other two materials, and it is also a common problem of wall cracks in the field of building insulation. So far, Qinhuangdao Yaohua Jian'an Engineering Co., Ltd. has pioneered the new technology of "shear wall external thermal insulation composite wall" formed by once pouring of polystyrene board and cast-in-situ concrete wall. The above properties were tested by the Tianjin University Civil Engineering Inspection Center to fully meet the quality requirements of the construction project. In December 2001 and February 2002, the technology was formally accepted by the State Intellectual Property Office and patented for inventions and utility models.
In order to further reduce the construction cost, the company also adopted another patented technology of its own, “Disassembling Bamboo Plywood Support and Reinforcement System†when building a model building. Bamboo formwork is one of the new materials promoted by the Ministry of Construction. It has a low overall cost and a short production cycle. However, the large-scale bamboo formwork on the market suffers from problems such as complex template cards, large fixed spacing, and lax fixing, and the template is easily deformed and has low reusability, which results in degraded wall quality and increased costs due to repair defects. In order to overcome the defects in the use of bamboo formwork, the company decided to change the large formwork to a small formwork and to support its own design of special fixtures and other fixtures to form its own complete set of loose-leaf bamboo plywood formwork support reinforcement system. In the construction, firstly, the steel bars are tied together according to the design thickness of the wall, and the formwork is supported on both sides of the reinforcing bar. The template is used to form large pieces together with special fixtures, then the concrete is poured, the mold is finally removed, and the wall surface is molded once. This type of wall surface is smooth, no plastering, to ensure that the thickness of 140mm wall thickness error between 0 ~ 2mm. This patented technology template has the advantages of simple processing, short production cycle, low cost, no need of large-scale cranes for construction, convenient handling, labor-saving and quick support.
The energy-saving model building built with a composite heat-insulating wall and bamboo plywood support reinforcement system is warm in winter and cool in summer. Under the same conditions, the temperature in summer is 1°C~2°C lower than other walls and 2°C～3°C in winter, saving heating and cooling costs. This technology brought about a revolution in building walls and promoted the development of building energy-saving technologies.