The policy of the Government is to develop social housing with low price and high quality to meet the growing requirements of demand for houses for workers in the country. At a meeting with the Ministry of Construction recently, a leader of Hanoi People's Committee to raise the issue technological applications Precast in ensuring diversity in architecture, reducing construction costs. Revolves around the advantages and disadvantages of this method, newspapers Construction had a talk with Dr. Tran Race - experts State Council accepted the construction work, senior adviser KHCNXD Institute. Technology precast concrete construction precast long history of the world. But with Vietnam, this technology have a place like, sir?
- In 1824, the British inventor of Portland cement in the region and to the industry in 1848 modern cement was officially formed to create a breakthrough in the field of construction materials production. To 1855, reinforced concrete materials (RC) was officially born. Initially monolithic reinforced concrete in place is the early twentieth century and assembled concrete began appearing with simple structures as piles, beams, columns commonly used in construction industry, military. In the years after World War II, with the aim of focusing worry housing for the population, housing construction technology using reinforced concrete structure fitted in European countries are taking care of finishing. Structural Concrete Prefab has created the advantage of speed as the original building frame structural system, structural system components assembled from large panels are formed and flourished after 1954 in European countries that Featured in Belgium, the Czech Republic and especially in the USSR (former).
Technology built large structures assembled panels Vietnam has been studied and applied since late 1960 and thrived in the 70s of last century. Originally also the structural system hang beams precast slabs but then the large apartment as Vo, Success, Kim Lien, Thanh Xuan Nghia ... (Hanoi) and some residential areas in Hai Phong, Vietnam Tri, Thanh Hoa, Nghe An, ... are formed from tilt-up technology.
Over time the technology used in Vietnam. How do you evaluate the pros and cons of them?
- The biggest advantage of the tilt-up technology can be industrialized by the construction industry and reduce construction time. As we know, construction is influenced by many factors during construction that climatic factors in building conditions in Vietnam have significant impacts affect the progress and quality of works . On the other hand, since most structures are manufactured according to industrial chain through the stages in the factory should check the quality of products is guaranteed at the best rate. The remaining work in the field significantly reduce the time, labor and especially reducing the volume of materials to construction methods such as scaffolding, formwork than pouring concrete on site.
However, the housing assembly technology from large panels made of reinforced concrete was limited as the monotony of the architecture and needs of modern construction equipment such as cranes, truck component ...
It was suggested that use large sheets assembled concrete in social housing construction will reduce the cost of construction. He said how about this?
- Apparently a new construction technology to bring the benefits Vietnam. If told to reduce costs must take into account the overall benefits that this method brings. The first is effective because the components are manufactured from the industrial chain to create highly productive and value added also grew under; followed by the costs incurred in the manufacturing process can be reduced to a minimum; the management costs are minimized due to professionalization, highly specialized in the manufacturing process; quality risks are proactively identified and remedied. Since industrialization process of housing construction, the chemical structures are typically designed so costs are minimized. But construction costs are reduced significantly faster construction progress and quality control is good and the design life is guaranteed.
Therefore, any direction for concrete technology using large panels for prefabricated buildings in the future in Vietnam, said no?
- There is no reason that the priority of the Vietnamese construction technology Prefab method has not been operated in the housing program for the people concerned in the near future. Besides these advantages, we also need to look into the face of the existing construction technology was applied in our country in the period 1970 - 1980. It is the application of rushing style " Movement "together with the construction quality control is loose, the maintenance work is almost nonexistent cause serious deterioration of most of the buildings assembled despite over a quarter life expectancy, created to image "ugly" in residents of this house type. That, makes people turn away from the assembly.
So, we want to develop this type of home, to invest in research in a scientific manner, seriously on all issues as a basis for the mass deployment of this technology. The countries around us, such as Singapore, Malaysia is building housing for direct democracy in this technology. The success of the technology building houses sell docking method by Company Corporation Vinaconex Xuan Mai of research and development has vitality in practice. Recently, Vinaconex Corporation collaborated Institute of Science and Technology of Vietnam's construction studies of the application of this work when subjected to earthquake on model scale of 1: 1 has opened up the possibility of applying technological boldly in the construction of residential buildings with less than 25 stories tall. The study results that have erased the old idea that this technology is only applicable to smaller 9-storey house. Thus, we want to develop this technology much more diverse, especially for tilt-up technology, the need to research to find the answer to the solution architecture, structural solutions that especially joints, construction technology, the level of perfection of system components and technical equipment in the same convenient maintenance issues throughout the design life ... If the conditions warrant it, technology definitely promising. The combination of investors, manufacturers and scientists make important fulcrum for the development of this technology in the future.
Sincerely thank you!