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Polyurea spraying participated in the first batch of commercial tests of planting roofs

recently, the two-year root puncture resistant commercial test of waterproof materials was successfully completed in the greenhouse of Beijing Institute of landscape science. The waterproof materials sprayed with polyurea waterproof coating and PVC polymer waterproof roll participated in this root penetration test

it is understood that this is the first commercial test of root piercing waterproof coiled material carried out in China, and it is the first test carried out with Chinese standards on the basis of the first experimental work carried out with reference to European standards in. A total of 6 domestic and foreign waterproof material manufacturers participated in the root puncture performance test. The resistance of waterproof materials is divided into chemical resistance and physical resistance. On site, there are many kinds of waterproof materials involved in the test, including spraying polyurea waterproof paint and PVC polymer waterproof roll, etc

according to Han Lili, the root puncture resistance planting experiment is a special experiment to determine the root puncture resistance of waterproof materials used for planting roofs. The experiment was carried out according to the method in Appendix A of the material standard "root piercing waterproof roll for planting roof", and met the requirements of the engineering standard "technical specification for planting roof engineering" (JGJ). The experiment was undertaken by Beijing Institute of landscape science. This experiment began in May, 2008. The experimental plant is Pyracantha fortunei. The experimental methods and conditions are carried out according to similar experiments in Europe

each kind of waterproof material is placed in a size of (800) after on-site construction × eight hundred × An important platform for seeking development opportunities 250) mm metal box for testing. During the test, place (150 ± 10) mm thick planting soil layer in each experimental box, and plant 4 Pyracantha fortunei to test the root puncture resistance of waterproof coiled material. It is understood that the experiment was carried out in a constant temperature greenhouse at 27 degrees Celsius, and the fatigue damage phenomenon and fracture characteristics were observed periodically for two years, equivalent to four years in the outdoor environment. Each enterprise has six test boxes. If any one of them actually presses the Rockwell hardness tester indenter (diamond cone, steel ball or cemented carbide ball) into the sample surface in two steps, and the test box cannot meet the requirements of root puncture resistance, the root puncture resistance test of waterproof materials of the enterprise will fail, and the results are very cruel

relevant personnel said that planting roofs can reduce the urban heat island effect, increase oxygen content, reduce carbon dioxide emissions, absorb dust, have a significant effect on improving the atmospheric environment, and also have many benefits such as heat insulation, heat preservation and sound insulation for the building itself. However, planting roofs requires not only strict construction technology, but also special requirements for the performance of waterproof materials, Waterproof materials used for roof greening must have the performance of resisting puncture of plant roots. When selecting waterproof materials for planting roofs, we should consider not only their root puncture resistance, but also their corrosion resistance. If the root puncture resistance of waterproof materials passes the test, but the physical properties of the materials fail, it will also leave hidden dangers for roof leakage

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