Criticism on the article "Countdown to the Elimination of Polyethylene Polypropylene Waterproofing Membrane"
Time：2018-12-01
Anti-enterprise InternetOn June 18, at 00:48, the Economic Observation Network published an article entitled "Countdown to the Elimination of Polyethylene Polypropylene Waterproof Coils". Since then, many network media have forwarded the article.This article is full of common sense errors, partial generalization and logical confusion, which seriously misleads consumers. The errors in this article are now refuted one by one in order to set the record straight.
1. arguments, arguments, conclusions have no credibility.
The article mentioned that "Jilin Province Songyuan City Hada Street on a real estate project since 2012 construction, to the completion of the so far, due to the basement leakage problems, has not been able to sell on schedule, Party A suffered direct losses and subsequent maintenance costs are huge amount of loss. According to maintenance personnel, the culprit of the leakage problem is the basement waterproofing material using polyethylene polypropylene waterproofing membrane."
1. The name of the real estate project has not been stated. It is ambiguous how serious the leakage problem is and how much the loss is.There are no clear data from the relevant arbitration institutions.Facts and arguments are not enough to be accepted.
2. The conclusion is that "according to the maintenance personnel, the main culprit of the leakage problem is that the basement waterproof material adopts polyethylene polypropylene waterproof coiled material". There is no test report from relevant testing institutions and the appraisal report issued by the judicial appraisal center of construction engineering quality,It is not convincing to draw a conclusion based on the mere words of the repairman.
3. That is to say, the leakage of the real estate project is real, and the polyethylene polypropylene waterproof material is used. How about the quality of the polyethylene polypropylene waterproof material? Is it a qualified national standard product? According to the description in the text, there is no way to judge,How can we come to the conclusion that "there are major defects in the material properties of polyethylene polypropylene waterproofing membrane and the reliability of construction application."However, it accounts for 30% of the domestic market share of waterproof materials, causing great harm to the construction industry "? Is the author jumping to conclusions without a clear investigation, making a logical error of generalization, or is he aware of it and instructed to deliberately mislead readers and consumers by using the mouthpiece of news and public opinion? I believe the reader has his own judgment.
The conclusion that 2. polyethylene polypropylene fiber waterproofing membrane waterproof function is poor has no data and facts to support it.
Polyethylene polypropylene composite waterproofing membrane has been applied in China since the 1990 s. It has been widely used in roof waterproofing engineering, underground engineering, water conservancy, transportation, municipal engineering and other engineering fields for more than 20 years. There are hundreds of thousands of cases in engineering practice.
However, the Economic Observer article mentioned that polyethylene polypropylene waterproof material is the "culprit" of leakage, "the product has poor aging resistance and poor waterproof function",Only a qualitative judgment was made, and it was not provided in these hundreds of thousands of engineering cases where polyethylene polypropylene waterproof materials were used.That is, the poor quality of polyethylene polypropylene waterproof coiled material leads to the exact data support of engineering leakage, and should not be used as the direct basis for the conclusion that polyethylene polypropylene waterproof material is the "culprit" of leakage.
As for polyethylene polypropylene fiber waterproof material"Poor aging resistance and poor waterproof function" is even more nonsense.. Polyethylene is a plastic material, in the range of 100 degrees Celsius thermal deformation can be restored, the waterproof layer generally will not exceed this temperature. And most of the waterproof layer outside will have a protective layer, polyethylene polypropylene waterproof membrane will not be exposed to use, will not be exposed to ultraviolet light, will not affect its aging resistance.
It is mentioned in the paper that the use of cement gluing method for polyethylene polypropylene waterproofing membrane is not reliable. In fact, many projects currently use two layers of polyethylene polypropylene waterproofing membrane, staggered (1/2 or 1/3) overlap, in the entire waterproof system, the layer structure plays a role in blocking water leakage. And the current polyethylene polypropylene waterproof membrane to improve the lap technology,Polyethylene polypropylene fiber waterproof materialNon-curing waterproof binderThe composite waterproof construction technology was included in the ten new technologies promoted and applied by the Ministry of Housing and Urban-Rural Development in 2014.
Whether polyethylene polypropylene waterproof membrane has poor aging resistance and poor waterproof function should be done by the national quality supervision department and testing institutions to do a lot of basic research and release authoritative data. Only these data can become the basis.Only by "industry experts said" and so on false, you can tell the life and death of a product, comrade reporter, don't you think you see yourself as God?
3. text is full of common-sense errors
The article mentioned that "many polyethylene films are waste films recycled from farmers' markets". "Polyethylene polypropylene composite (PE) waterproofing membrane" GB 18173.1-2012 national standard clearly pointed out that,Polyethylene polypropylene composite (PE) waterproofing membrane must use real polyethylene particle virgin material, Composited by one-time hot pressing. How can a qualified polyethylene polypropylene waterproof material be made of waste film?
Waterproof industry does exist small manufacturers, small workshops with polyethylene recycled materials to do polyethylene polypropylene waterproof coiled material, affecting the service life of the material. Then we shouldThe crackdown and criticism are those fake polyethylene polypropylene waterproof materials, and should not be "one size fits all"The good quality polyethylene polypropylene waterproof material is also generalized, throw away the bath water with the children.
It is mentioned in the article that "the thickness of waterproof polyethylene polypropylene core material is usually about 0.2-0.5mm, which is far lower than the minimum thickness requirement of the national standard." "Polyethylene polypropylene composite (PE) waterproofing membrane" GB 18173.1-2012 national standard for polyethylene polypropylene waterproof material profile thickness requirements is "product core thickness should be more than 0.5mm". The national standard is the minimum standard, the product standard of each production enterprise should be higher than 0.5mm, the author put forward the "waterproof polyethylene polypropylene core material thickness is usually about 0.2-0.5mm" point of view is how to get?
The author puts forward that the reason for the large use of polyethylene polypropylene waterproof material is because of "low price", and concludes that it will cause leakage.Is it certain that those with low prices are not good or qualified products?? Alto and Audi are both cars, will driving Alto lead to safety accidents? There is no logical relationship between them.
"Due to the loopholes and defects in industry standards and specifications, these products (polyethylene polypropylene waterproof materials) are still being produced and used in large quantities, and there are numerous cases of engineering leakage, which has become one of the main reasons for the high leakage rate of domestic construction projects."
In China, polyethylene polypropylene composite waterproofing membrane has perfect material standards and construction specifications. Material standards are "polyethylene polypropylene composite (PE) waterproofing membrane" GB 18173.1-2012 national standard.
Several national design and construction specifications, such as Technical Code for Roof Engineering (GB 50340), Technical Code for Waterproofing of Underground Engineering (GB 50108), Technical Code for Planting Roof Engineering (JGJ 155), etc,Polyethylene polypropylene composite waterproofing membrane has been included in it.
Polyethylene polypropylene composite waterproofing membrane is one of the important products to implement production license management.The quality of polyethylene polypropylene fiber waterproofing membrane is strictly controlled by the state.
The paper points out that local governments have also issued relevant regulations for polyethylene polypropylene composite waterproofing membrane. The author takes the "Beijing City Promotion, Restriction and Prohibition of the Use of Building Materials Catalog (2014 Edition)" as an example, "core materials."Thickness less than 0.5mmPolyethylene polypropylene composite waterproof membrane,Included in prohibited building materials, The reason is that the product has poor aging resistance and poor waterproof function." To illustrate the polyethylene polypropylene waterproof material gradually to be eliminated.
I don't know if the reporter knows, as early as March 18, 2004, the Ministry of Construction issued Announcement No. 218 of the Ministry of Construction's Promotion, Application and Restriction of Prohibited Technologies, which clearly pointed out that the production of polyethylene-polypropylene composite waterproofing membrane secondary heating composite molding products is prohibited; The thickness of the core layer of the product should be above 0.5mm. Therefore,Production after 2004In line with national standards of polyethylene polypropylene composite waterproofing membrane products, are a heating composite molding, product core thickness of more than 0.5mm,Not in the list of prohibited restrictions.
The state eliminated only "polyethylene polypropylene composite waterproofing membrane and polyethylene polypropylene composite waterproofing membrane (polyethylene core material thickness below 0.5mm) produced by secondary heating composite molding process", instead of all polyethylene polypropylene composite waterproofing membrane. This is the difference between the part and the whole. To show that this kind of product is poor with something that has not been produced for a long time, author, is your logic taught by a PE teacher?
4. a few observations
1. The high leakage rate of domestic buildings is due to the large number of non-standard products and fake and inferior products used in the field of engineering and construction,Waterproof project bidding using the lowest bid and layer by layer subcontractingThe construction subject has no qualification and the construction workers have no skills.
CurrentlyA large number of fake polyethylene polypropylene composite waterproofing membrane on the marketThe use of recycled materials for hot-pressing composite, not only disrupted the normal market order, to the building leakage hazards, but also caused misunderstanding, people think that polyethylene polypropylene composite waterproof membrane quality is poor. We cannot deny a product because of fake and shoddy phenomena, nor can the leakage caused by construction be attributed to the quality of waterproof materials.
It is suggested that more industrial policies should be introduced to standardize the bidding, quality control, construction qualification, worker skills and management improvement of building waterproofing projects, so as to ensure the safety, durability and non leakage of building waterproofing projects.
2. As the mouthpiece of the party and the people, the news media should respect the facts. Whether it is to affirm or deny a thing, we should not easily draw a conclusion, but should carry out extensive investigation and research in many links, such as construction management, design, construction, owners, material production, scientific research, inspection, and so on. There is no right to speak without investigation.
3. News organizations should strengthen the management and supervision of journalists and put an end to the occurrence of paid news. Journalists should have professional quality and moral bottom line. Journalists are uncrowned kings. If they master public opinion, they have great power and greater responsibility. I hope that comrades journalists will not abuse their power, abuse their power for personal gain, and become a tool for commercial competition. You must know that your pen is related to the livelihood of thousands of people.
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