Building blocks are specially fortified. Blocks are used as exterior wall materials in cold areas, and their thermal insulation performance has attracted people’s attention. The state also has stringent requirements for building energy efficiency. According to the “Civil Building Energy Efficiency Design Standards (Heating Part of Heating Buildings)†JGJ26-95 stipulation, when Harbin wants to achieve 50% energy saving, the outer wall f-coefficient heat transfer coefficient should be low. 52w/m: The use of sticky seven bricks requires 1.56 meters thick, but the cost increase can exceed 5% - 8%, which is very difficult to achieve. The seven coagulation blocks used as external wall materials to solve the insulation performance Q can take the following three approaches.
The first approach is to use 300 super-light shale ceramsites and formulate 500-level small hollow blocks to test the requirements of the GB15229-941 lightweight hollow concrete hollow block national standard. According to the small block type we designed, small blocks of different specifications were produced. The insulation performance of the blocks in the cold area was 290mm x 190mm. Three rows of holes The heat transfer resistance of the small block of Zhouyuncan of the Heilongjiang Provincial Research Institute of Building Construction M2.k/w, this result has exceeded the minimum heat transfer resistance of the building envelope structure in Harbin. Sanxia Immigration Area began to use blocks to build a house Chongqing Wanzhou (K) Immigration Development Zone is located in the Yangtze River I-Cybrid Warehouse of ftw x: Abdominal heart zone.
Such a large-scale migration resettlement: Cheng needs a lot of building wall materials. With the rise of the water level, the seventh floor of K’s building materials will eventually disappear due to submergence. Therefore, we must develop new building wall materials according to local conditions. According to the resource conditions of the reservoir area, the Ministry of Science and Technology of Fujian Province has been able to meet the needs of the factory and have had a total of ten factories. Research on production technology of small hollow blocks and Erfan I: Cheng Jianshe's "Key scientific research project H. Hydroxide over three years: work, fully completed the tasks specified in item "H", and passed in April 1999. Identification of scientific and technological achievements held by the Chongqing Municipal Science and Technology Commission; establishment of a block block production line (strong block) with an annual output of I0000M3, construction of a demonstration building of r-building 4000m-'g, and experimental study F. Production technology of block and block building design: T. technology, to play a good experimental demonstration for library lx: resettlement.
Through the recent years of human rumors and technology transfer, the M: production and application of blocks have made great progress.
The Emirates first light aggregate aggregates and seven hollow blocks have developed rapidly. There are more than ten mountains and mountains, a frame structure. The high number of 61 construction stores is more than the quality of the load-bearing wall M material demand, the market prospects are vast, and there are a large number of T. industry waste residue can not be comprehensive utilization, this will not only waste resources, but also affect the state environment. Therefore, priority was given to the development and application of the promotion of industrial waste light slag lightweight aggregates and air-used building blocks as infill walls of frame-structured buildings, and then gradually applied to promote the strategy of ramming load-bearing masonry; the use of technology transfer diffusion and training measures, etc. Wanzhou’s main urban area soon built more than 10 block production plants with different scales and different ownership systems. The annual production capacity reached 50,000 cubic meters. The products meet the national technical standards and E-life standards. Last year, Q completed nearly 30 construction areas. Million Party A, using industrial waste residue Chongqing Wanzhou Productivity Promotion Center (to be sufficient cinder ash and construction waste) i more than tons. n A number of construction companies have used t.industrial waste slag blocks before. Initially form/protect the benign mechanism of the ecological environment. According to the incomplete system, only the benefits generated by the foot block manufacturers and the building wall materials and materials saved by the construction companies amounted to 10 million yuan to produce the social economic and ecological benefits of Mif.
Followed by ordinary concrete coagulation: hollow blocks and construction ready to go. Since the identification of the project, U1 has Yunda Dahua in Yunnan Province, Chongqing Iron and Steel Co., Ltd., Jibei Science and Technology Commission, and Wushan. Fengjie, Heyang, Kaixian, etc. send pre-construction building economic columns 0.86m2.k/w According to the requirements, it can be seen that the use of a single material to achieve energy-saving requirements of 50% of external walls is entirely possible, and simplifies construction procedures and gives full play to the superiority of lightweight aggregates and small blocks. The combination of small blocks and their heat insulation and energy saving effect is even more pronounced. With 240mm and 90mm thick small block combinations and 240mm and 90mm thick small block combinations, energy saving targets of 3-50% of external walls can be achieved, but This is only the main part of the external wall of the heat transfer coefficient, but also consider the thermal resistance around the peripheral wall heat transfer coefficient by the area plus the average method to obtain the average, so the coefficient must be smaller to meet the requirements, how much smaller, It should be based on the layout and construction of the building, so energy saving 30% can be combined with blocks of 240mm and 90mm thick, and 50% energy saving, besides 240mm and 90mm thick block combinations, thermal insulation mortar masonry and double Plastering, same Should try to reduce the thermal bridge to a minimum. To achieve energy efficiency standards with greater certainty.
The second approach is: using ordinary small block composite polystyrene foam board, according to different requirements, the thickness of polystyrene board has 5 -10cm, after our trial construction of the new building materials Co., Ltd. Under the same conditions (simultaneous application T:, same orientation, same large room) The test results of the comparison between the small block wall of the composite 4~8cm polyphenylene plate and the red brick 37cm wall can be seen that the middle clip 8cm polystyrene board is used. The main part of the heat transfer coefficient can be achieved. 53w/m2k, close to the requirements of the JGJ26-95 standard for the Heilongjiang region. The equivalent of the red brick body 143cm thickness insulation performance. The benzene plate added to the lcm thick heat transfer coefficient can reach small f0.52W/m:. k indicator requirements.
The third approach is to use a small block with a density class of 600 or more and then compound the polystyrene board. As the small blocks of grade 6 or above use a single material to achieve the energy saving standard, the wall thickness should be greater than 50cm, reducing the housing The area of ​​use, W this can be taken in a light aggregate small block compound poly-steg. The wall thickness "I" is kept within 50cm. After we conducted trials of Qingan Metallurgical Cement Factory, we used a 3" x 190mm double-row hole and two 700-level small blocks to compound the 2cm blockboard. Double-sided plastering was measured. As a result, the heat transfer coefficient is up to 63w/m'-k, which is equivalent to the thermal insulation performance of the 126cm red brick wall thickness. If a 90mmx1å¯mm intermediate composite 5cm benzene plate is used, the wall thickness does not exceed 40cm and the 700 light aggregate small blocks are used. Can also meet the national standard heat transfer coefficient 52W/m2 k requirements.
In short. According to different types of small blocks, different measures are taken. The thickness of the wall does not exceed that of traditional red bricks and two bricks. It is totally NT capable to meet the energy saving standards. It is in line with the innovation of wall materials and energy conservation in buildings, and the government’s human resources development and promotion. Apply the coagulation seven block wall.
Lishui City, Zhejiang Province promoted block building to inspect and consulted. In Wanzhou City, some construction units also used ordinary coagulation t-hollow blocks to build the frontage gates and walls, and some construction units are collecting data and training personnel to build medium and high-rise buildings. Block building. It can be foreseen that with the rise of the water level in the second phase of the Three Gorges Project, the sand siliceous bricks of the main building wall materials will basically disappear, and the application and expansion of the hollow building blocks will provide historic development opportunities in the resettlement of the reservoir area.
In addition, industrial waste slag hollow blocks have good development prospects in the counties along the river in the immigration zone. Along the Yangtze River, Wushan, Fengjie, Yunyang, Kaixian and Zhongxian all have a large amount of T-spent waste (mainly cinder ash) and other stumbling block materials (in terms of coal slag, about 30 tons per year). . Prepare to promote the use of industrial waste slag hollow blocks (non-load-bearing), and then develop and promote load-bearing hollow blocks (Ding. Industry waste slag load-bearing hollow block test development has been established).
Coagulation: H hollow block and block building not only meets the requirements of China's industrial policy and sustainable development strategy, but also suits the specific conditions of the reservoir area. It can be expected that the concrete hollow block and block building will play a greater role in the future immigration development.
Lishui City is located in the mountainous area of ​​southwestern Zhejiang. After more than 10 years of exploration, it has been very effective to develop small concrete blocks. In 1999, the construction area of ​​the new wall material building in Lishui reached 190,000 square meters, the utilization rate of the new wall material reached 62%, and the utilization rate of new wall materials in the urban area reached 85%. It was the leading level in the province and even the whole country.
Lishui City is located in the middle of the Lancang River. The Lancang River is 46.5 kilometers long in the territory. The tributaries are criss-crossing and the sand and gravel resources are abundant. Based on this, the city wall will be reorganized to determine the development of bearing concrete small blocks as the main direction of Lishui new wall paper / Zhang Yicheng material.
HS Water City promoted the construction of a new type of wall material in the water market through the development of small concrete blocks. It covers an area of ​​70,000 square meters, saves 20,000 square meters of construction land, saves construction costs of 14.08 million yuan, and saves 4.97 million tons of steel. 12,000 tons of coal. Save 195,000 square meters of brick kiln land (according to the depth of 2 meters per H).
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