Construction waterproofing membranes are mainly used in building walls, roofs, and tunnels, highways, landfills, etc. to play a role in the prevention of water seepage. With the development of the construction industry, people's requirements for construction materials and construction quality have been continuously improved. Waterproofing has gradually attracted attention as the basic function of buildings, and the quality of products for building waterproofing membranes has also drawn increasing attention.
In order to further promote the improvement of product quality and standardize the development of the waterproofing membrane industry, the AQSIQ organized a national supervision and spot check on the quality of construction waterproofing membrane products. A total of 29 products produced by 29 companies in 8 provinces and municipalities including Beijing, Tianjin, Liaoning, Henan, Hebei, Shandong, Jiangsu, and Zhejiang were qualified, and 25 were qualified. The sampling qualification rate was 86.2%, of which 17 samples were spot checked. Elastomer modified bitumen membrane, the product pass rate of 82.4%; spot checks of 12 kinds of polymer waterproof membrane, product sampling pass rate of 91.7%.
The spot check results showed that the qualification rate of large and medium-sized enterprises remained at a relatively high level, reaching 90.9%, and that of small-scale enterprises was 83.3%.
The main quality issues found in this spot check:
1, 60 °C tensile strength, heat expansion and expansion project failed. The 60°C tensile strength at break and the amount of heat expansion and contraction are important quality indicators of polymer waterproofing membranes. In this spot check, the tensile strength at break at 60°C of one product was only 0.81 MPa (longitudinal) and 0.52 MPa (transverse), which was far from the standard required 2.3 MPa, and the amount of heat expansion and contraction was more than twice the standard value. In the course of using such a product, once it encounters high temperatures, there is no strength, and it easily causes tearing and leakage.
2, soluble content does not meet the standard requirements. Soluble content is an indicator reflecting the content of SBS, the main raw material in modified bitumen waterproofing membrane products (namely, the amount of SBS modified by bitumen). It is an important indicator for distinguishing the thickness of waterproofing membranes. The thicker the nominal thickness of membranes is. The higher the soluble content, the higher the corresponding price of the coil. According to the standard, the soluble content of 3mm thick product must reach 2100g/m2. The soluble content of 1 product in this spot check was only 1542.2 g/m2. This product had poor aging resistance and poor waterproof layer during use.
3, low temperature flexibility project failed. This indicator will directly reflect the ability of the product to withstand the deformation of the base during winter use. There is one type of product that is not up to the standard for this spot check. If used under severe cold temperatures, it will crack easily and lose its waterproof effect.
4, the maximum tensile force elongation project failed. The maximum tensile elongation is also an important indicator of the material's resistance to deformation. The GB18242-2000 "Elastomer Modified Bitumen Waterproofing Rolling Material" standard stipulates that the elongation of the polyester tire type I product must be ≥ 30% of the maximum tensile force. There are 3 kinds of products in this spot check. This item does not meet the standard requirements. In the course of using such products, once the base layer undergoes a large deformation, the material will be torn or cracked, and leakage will occur.
For the results of this spot check, AQSIQ will step up publicity efforts to publish a list of companies with good product quality in the news media, expose the list of companies with poor product quality, and instruct the quality and technical supervision departments at all levels to strictly follow Product quality law and other relevant laws and regulations stipulate that enterprises that have failed product quality inspections in this random inspection shall be investigated and dealt with in accordance with law, and enterprises shall be urged to rectify within a time limit, so as to promote the overall quality level of the waterproofing coiled material industry.
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Hengshui Longtai Rubber & Plastic Co., Ltd. Shanghai Baoshan District Xincheng Flower Gardening Field Hengshui Hongye Engineering Rubber Products Co., Ltd. Dezhou Runze Geotextile Material Co., Ltd. Zhengzhou Zhongke Support Machinery Co., Ltd. Dezhou Yaohua Geotechnical Material Co., Ltd. Xi'an Kangmei Waterproof Engineering Co., Ltd. Oudi Waterproof Material Co., Ltd. Hengshui Mingze Rubber Product Co., Ltd. Ningbo Xuannuo New Material Co., Ltd. Taian Peng Lotus Geosynthetics Co., Ltd. Window.onscroll=function() {if(document.body.scrollTop>915){document.getElementById("float").className="div22";}else{document.getElementById("float").className="div12 ";} ;}; var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js ?459a6a88cf63f5fb5915667c7a0de63d"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })();
In order to further promote the improvement of product quality and standardize the development of the waterproofing membrane industry, the AQSIQ organized a national supervision and spot check on the quality of construction waterproofing membrane products. A total of 29 products produced by 29 companies in 8 provinces and municipalities including Beijing, Tianjin, Liaoning, Henan, Hebei, Shandong, Jiangsu, and Zhejiang were qualified, and 25 were qualified. The sampling qualification rate was 86.2%, of which 17 samples were spot checked. Elastomer modified bitumen membrane, the product pass rate of 82.4%; spot checks of 12 kinds of polymer waterproof membrane, product sampling pass rate of 91.7%.
The spot check results showed that the qualification rate of large and medium-sized enterprises remained at a relatively high level, reaching 90.9%, and that of small-scale enterprises was 83.3%.
The main quality issues found in this spot check:
1, 60 °C tensile strength, heat expansion and expansion project failed. The 60°C tensile strength at break and the amount of heat expansion and contraction are important quality indicators of polymer waterproofing membranes. In this spot check, the tensile strength at break at 60°C of one product was only 0.81 MPa (longitudinal) and 0.52 MPa (transverse), which was far from the standard required 2.3 MPa, and the amount of heat expansion and contraction was more than twice the standard value. In the course of using such a product, once it encounters high temperatures, there is no strength, and it easily causes tearing and leakage.
2, soluble content does not meet the standard requirements. Soluble content is an indicator reflecting the content of SBS, the main raw material in modified bitumen waterproofing membrane products (namely, the amount of SBS modified by bitumen). It is an important indicator for distinguishing the thickness of waterproofing membranes. The thicker the nominal thickness of membranes is. The higher the soluble content, the higher the corresponding price of the coil. According to the standard, the soluble content of 3mm thick product must reach 2100g/m2. The soluble content of 1 product in this spot check was only 1542.2 g/m2. This product had poor aging resistance and poor waterproof layer during use.
3, low temperature flexibility project failed. This indicator will directly reflect the ability of the product to withstand the deformation of the base during winter use. There is one type of product that is not up to the standard for this spot check. If used under severe cold temperatures, it will crack easily and lose its waterproof effect.
4, the maximum tensile force elongation project failed. The maximum tensile elongation is also an important indicator of the material's resistance to deformation. The GB18242-2000 "Elastomer Modified Bitumen Waterproofing Rolling Material" standard stipulates that the elongation of the polyester tire type I product must be ≥ 30% of the maximum tensile force. There are 3 kinds of products in this spot check. This item does not meet the standard requirements. In the course of using such products, once the base layer undergoes a large deformation, the material will be torn or cracked, and leakage will occur.
For the results of this spot check, AQSIQ will step up publicity efforts to publish a list of companies with good product quality in the news media, expose the list of companies with poor product quality, and instruct the quality and technical supervision departments at all levels to strictly follow Product quality law and other relevant laws and regulations stipulate that enterprises that have failed product quality inspections in this random inspection shall be investigated and dealt with in accordance with law, and enterprises shall be urged to rectify within a time limit, so as to promote the overall quality level of the waterproofing coiled material industry.
Construction waterproofing product quality national supervision spot check results red and black list
Construction waterproofing membrane product quality national supervision and inspection of some of the better quality products and their list of companies
No.
Company Name
trademark
specification
model
Production Date
1
Beijing Oriental Yuhong Waterproof Technology Co., Ltd. waterproof material factory
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