Guangdong Road protection building facade cleaning: by the University of Hong Kong repeatedly verified.

China Paint Network
News:
Guangdong Road 102 protection building in April this year was exposed to "brush face", Huangpu District News Office held the third media conference yesterday. At present, cleaning materials through the University of Hong Kong laboratory and on-site trial and error, in order to ensure that no secondary damage to the wall, the official start of cleaning works, the duration is expected to last nearly two months.
Construction: craft pay attention to the steps more yesterday afternoon, reporters came to Guangdong Road 102, this bearing a hundred-year-old building facade has been set up scaffolding, staff have started the clean-up work, before the unauthorized spraying of the outer wall is also clearly visible. "It's easy to destroy, it's hard to fix." Construction party Shanghai Architectural Decoration Group architect Chen Zhongwei introduced, the building for Shanghai's outstanding historical protection building, the facade is using bluestone, surface sprayed real stone paint has a certain degree of irresaability, this material is completely closed, breathable, the bluestone material has greater damage. Therefore, first of all, the facade sprayed on the material for cleaning, but can not destroy the original wall, if the material selected if unreasonable, it may change color, and further damage the original has some weathered surface. Cleaning is top-down, the process is very exquisite. The workers first applied a layer of latex-like cleaning material to the wall, then used plastic film to make the watch bread, after 12 hours of softening, and then with a little professional tools to spray the
paint
shoveled off. After eradication, the wall is washed with a low-pressure water gun to restore the wall to its original condition. Chen Zhongwei described the whole job as like whitening a woman's mask. "If the potion is too strong, it will certainly lead to skin irritation." Cleaning the outer wall on the amount of cleaning materials also pay attention to, not only to achieve the purpose of cleaning but also play a protective role. Material: Repeated verification of "three choices" has previously been reported to have irreversible effects after the building was "brushed face". Therefore, in the use of cleaning materials, the construction side repeatedly verified. "We sent the building's similar exterior wall materials and cleaning materials to the University of Hong Kong laboratory for testing and soaking the building materials in cleaning materials to see if they were damaging to the building's materials. A total of three cleaning materials were selected. The first is volatile filling gas, the second is neutral latex and the third is silicone. After experiments, it was found that the first irritating odor was larger, damaging to bad situations and wall stone, and the third had the same irritating odor. The second is that there is no damage to the wall, which is a feasible solution. Chen Zhongwei introduced. As a result of caution, on the basis of the experimental demonstration, the Municipal Housing Authority has also organized two rounds of expert demonstration, and finally determined the rectification plan, clear construction technology. Huangpu District Housing Authority Deputy Director Yu Weimin said that at present, the decoration group has done all the preparatory work, and on September 24 officially entered the site to start construction, the entire construction period is expected to last nearly two months. The original Mitsubishi Yangye Building at 102 Guangdong Road, which cost more than 1 million yuan to repair, was built in 1914 and designed by Japanese architects. It is not only an excellent historical protection building, but also a registered non-medible cultural relics. After the spraying incident, the District Cultural Bureau in the first time jointly with the district housing management, regulation and soil control departments called off construction, and the enterprises made a fine of 500,000 yuan administrative penalty decision. "The cleaning repair is not over yet, but the follow-up cost must be more than $500,000." Chen Zhongwei also revealed. "Hopefully, this incident will serve as a warning to users of other outstanding historic buildings and will not be damaged without authorization." At present, there are more than 800 non-removable cultural relics registered in Huangpu District. According to the relevant provisions, the management department shall register the identity of non-med med medable cultural relics to the owner, the user "bottom" to inform the parties of the relevant protection responsibilities. District housing management, culture and other departments said they will continue to promote this work to enhance the protection of old homes awareness.