This is the first batch of commercial tests for puncture-resistant waterproofing membranes in China. It was the first trial conducted in China in 2007-2009 based on experimental work conducted in accordance with European standards. There were 6 domestic and foreign manufacturers of waterproof materials for this time involved in the puncture resistance test. The barrier of water-proof material is divided into chemical resistance and physical resistance. The reporter saw on the spot that there are more varieties of waterproof materials involved in the test. There are SBS modified bitumen-resistant puncture-proof waterproofing membranes with doping inhibitors. Resistant with copper foil SBS modified bitumen root puncture waterproofing membrane, spray polyurea waterproof coating and pvc polymer waterproofing membrane.
According to Han Lili, the puncture-resistant planting experiment is a special experiment for the determination of root puncture resistance of waterproof materials used for growing roofs. The experiment was carried out in accordance with the material standard "Approved rooting puncture waterproof membrane" Appendix A method, while meeting the engineering standards "planting roof engineering technical specifications" (JGJ155-2007) requirements, the experiment was undertaken by the Beijing Institute of garden science . The experiment began in May 2008. The experimental plant was Pyracantha. The experimental methods and conditions were carried out according to similar European experiments.
The reporter observed that each type of waterproof material was placed on a metal box of (800×800×250)mm in size for testing after on-site construction. At the time of testing, (150±10)mm thick planting soil layers were placed in each experimental box, and 4 firethorns were planted to test the puncture resistance ability of the waterproofing membrane. It is understood that the experiment is conducted in a thermostatic greenhouse at 27 degrees Celsius with a period of two years, which is equivalent to four years of outdoor environmental time. Each company has 6 test boxes. If any one of the test boxes fails to meet the requirements of root puncture performance, the puncture resistance test of the waterproof material of the company fails and the result is very cruel.
The most exciting thing is the process of revealing the results of the experiment. The feelings of the participants, as one manager of the company said, are as if they were in Beijing. The experiment box was tipped over and no roots were seen through the transparent glass bottom plate. At this time, the ceramsite was opened again and the non-woven fabric was uncovered. The black waterproof layer was exposed under the eyes of the public and no roots were allowed to pass through. But it is still too early to cheer. Zhu Zhiyuan, like a strict surgeon, carefully observed the surface of the coil and cut the coils with a knife that cuts the coils to find traces of the roots. 'If it is a waterproof membrane with a root-repellent agent, the root system should not exceed 5mm at the seam of the coil, even if it is qualified. 'Zhu Zhiyuan explained to reporters.
There was a surprise from time to time during the discovery of the experiment: There was an opening of the experiment box of the company, and there was no trace of 1 cm from the planting soil; in the experiment box of the enterprise, the root disk was stuck at the bottom of the planting soil and it was not possible to step over the coil; Someone curiously plans to root out the roots of the soil, which is more than one meter long. However, those waterproof membranes used for comparative experiments were less fortunate. Some of these waterproofing membranes, which have no chemical and physical barrier properties, have already completely rotted and ran out of foul odors, while others have been thoroughly rooted.
Zhu Dongqing told reporters that planting roofs can reduce the urban heat island effect, increase oxygen content, reduce carbon dioxide emissions, absorb dust, and have a significant effect on improving the atmospheric environment. It also has many advantages such as heat insulation, heat insulation, sound insulation, etc., but it is planted. The roof requires not only strict construction techniques, but also special requirements for the performance of the waterproof material itself. The waterproof material used for roof greening must have the ability to withstand the puncture of the roots of the plants. The selection of waterproof materials for planting roofs should not only consider its root puncture resistance, but also consider its corrosion resistance. If the puncture resistance of the waterproof material passes the test, the physical properties of the material will not pass. This will also leave a hidden danger to the roof leakage.
The waterproof puncture-resistant puncture commercial test was completed, and everyone's face was filled with joyous smiles. The reporter walked in the greenhouse of the Beijing Institute of Garden Science. There was also a firecracker that grew for 1 and 6 months. It was also lush and gratifying, and it was a root-resistant puncture experiment that other manufacturers were doing. The reporter can not help but secretly look forward to the next year, the following year, there will be more puncture waterproof material through the test, China's planting roof will usher in a flourishing spring.
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