According to relevant regulations , the Qingdao Municipal Urban and Rural Construction Committee led the development of the "Qingdao prohibit or restrict the use of construction materials catalog (the first ) ," and in March 20 officially announced.
Directory is divided into two parts, the first part of the materials for the project "Disable directory ", the second part is engineered materials " Restricted List ." The first is disabled total ten kinds of building materials , including : multi-functional compound ( two or more kinds of functions ) concrete expansion , calcium oxide class of concrete expansion , clay ( including mixed with other raw materials , but more than the amount of clay 20% of solid brick , brick, hollow brick ) , ceramic clay and shale and clay and shale ceramic products as raw construction materials , hand- molded GRC lightweight partition board to amphibole asbestos ( ie blue asbestos ) and other raw materials as asbestos building materials products , not fiberglass mesh reinforced cement ( gypsum ) polystyrene insulation board , PVC insulation strip sealing strip, sand , hemp just sand .
This is why dozens of construction materials are prohibited from using it? Reporter saw is disabled after each class building materials have been banned description of concrete materials , for example, the kind of building materials banned , mainly because this material quality is difficult to control , but was included in the disabled directory is based on the Ministry of Construction , " construction" Eleventh five-Year " to promote the application and limitations prohibit the use of technology ( the first ) ."
Besides , what is the reason? " Backward production technology , environmental pollution and endanger human health , low intensity, easy to crack, even in aging , easily corroded steel, affect the structure of life , severely reducing concrete, mortar strength and durability production process destroys arable land and vegetation , which are the cause of building materials is disabled . " staff said .Washi tape
On the list of directories to be restrictions on the use , the reporter saw , including four decorative materials, they are: polyvinyl alcohol binder melamine interior paint, polyacrylamide construction adhesives , not water scraping the wall putty , polyvinyl formal adhesives ( 107 glue ) . One reason restricted are: poor water resistance , excessive discharge of pollutants ; temperature performance is poor, poor durability , easy to fall off ; poor water resistance , low intensity ; poor bond performance , emissions exceeded.
There are a variety of building materials is restricted , including : bagged cement ( except special cement ) , the construction site mixing of concrete , construction site mixing mortar, chloride ion content of > 0.1% antifreeze concrete , clay burning ash silicon Portland cement . The main reason for the limited use of environmental pollution and easy corrosion.Wholesale masking tape
Reporters learned that the island city urban construction department will start construction safety inspection in March , mainly engaged in checking housing construction, housing demolition , landscaping, municipal engineering, rail transportation engineering construction enterprises , institutions and practitioners for the city building, check the contents of undocumented or incomplete engaged in production license or safety evaluation and testing inspection ; business unit leaders, managers, special operations personnel and other relevant staff did not obtain the relevant qualifications for posts ; license management is not strict , fails requirements or eligibility to participate in relevant training and learning qualification examination certificate ; did not timely replacement license within the laws and regulations in the period .Masking tape
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