How to avoid the "plastic runway GeBiao unqualified"

09:09 on June 12, 2016

Source: China youth daily

Beijing second Bai Yunlu experiment elementary school campus "smell the playground" after the incident, how scholars pointed out that "testing meet the national standards, but does not represent the runway non-toxic".

, according to a report in the Beijing television station "Beijing time", has 17 years experience in product safety testing and chemical toxicology evaluation of professional Wei Wenfeng said the national standard "synthetic materials runway surface" (GB/T 14833-2011) only article 4.2.2 of chemical hazards in the detection requirements, the test items is not much, only benzene, toluene and xylene, free tdi, heavy metals, soluble, soluble chromium, lead, soluble cadmium soluble mercury). This, he said, several restricted hazardous substances cannot cover the actual runway may send out the harmful chemical gas.

Wei Wenfeng Suggestions, should be after the construction completion, gas detection was carried out on the runway surrounding air, the main detection of carbon disulfide in the air, chlorinated paraffin, toluene, ethylbenzene and xylene excessive levels, "the content of gas detection, not plastic particles detection".

According to China youth daily, middle online reporter understanding, on May 4, led by the shenzhen institute of building science, shenzhen quality inspection institute, environment school to participate in the drafting of the composite material surface quality control standards for sports venues in shenzhen formal trial. The standard editor, shenzhen institute of building science, chief engineer Ren Jun told reporters, the China youth daily, middle online detection range from shenzhen standard prescribed by the state of 7 kinds of expanded to 14 kinds of harmful substances, also fill the lack of engineering construction standard in the national standard, from design, material selection, material approach and construction stages such as a full range of standards, assessment and increases the smell.

According to the southern education times revealed that odor evaluation standard is divided into 5 levels, level 1 for no smell, level 5 for stimulating uncomfortable odor. Synthetic material surface field air smells ratings should be not more than 2, that is a slight odor. The standard also requires, synthetic material surface gasoline is strictly prohibited and containing benzene, toluene, xylene, carbon disulfide, methylene chloride and other solvents.

Ren Jun that shall be specified in the technical standards and administrative regulations, the relevant construction site is prohibited to use the solvent, "during the construction of these solvents, there are a lot of environmentally friendly alternatives are not these alternatives, is because of the high cost".

Ren Jun told China youth daily, middle online journalists, the existing national standards to limit the harmful material to a certain extent, but did not keep pace with the development of material technology. "The development of chemical additives, soon a lot of people in order to reduce the cost of using some cheap harmful substances, the original standard will not be able to cover these new things." Therefore, some even if the inspection according to the national standard and the runway actually taste is very heavy.

National standard "synthetic materials runway surface" (GB/T 14833-14833) of the main draftsman ShiJianHua in an interview with China youth daily, middle online journalists also said that some manufacturers, engineering contractors, devotion to the interests of the market competition, now the problem such as "poison" runway is led to frequent. At the same time, the current tender method also loophole, "2003 years ago, the bidding will go to factory inspection, look have construction ability, production capacity. But seldom go to factory inspection, more is subject" a paper document of each company.

Regulation also face problems. Ren Jun, said the national standard in the product standard is by the quality supervision institutions, technical supervision institutions to management, engineering construction standard, management by the construction department. In addition, the "poison" runway problem also involves the education department, and even the national development and reform commission, finance and other departments, the owner and the management department also has regulatory responsibilities, lead to "everyone can tube, but have not taken seriously".

The current national standard for recommendation rather than mandatory standards, have also been some scholars criticized. In jung's view, the runway standard shall be compulsory standards, if it is up to your usual standard, many enterprises have liability, "even if there is a problem, because is not strong, responsibility is difficult".

"So many mass incidents, has reached a standard has to be used to solve the problem of time." Ren Jun said. (reporter Lu Yijie)