Research on durability of geotextile Yu Zhiqiang1 Fu Haifeng2 Miao Zhonghai' Hu Ailong3 (1Tianjin Harbor Engineering Research Institute Tianjin 300222.2 Tianjin Port Engineering Supervision and Consulting Co., Ltd. Tianjin, 300456, 3. Changjiang Waterway Bureau.Wuhan, Hubei 430010) Abstract : This paper analyzes the influence of different climatic conditions, materials, and weaving types on the durability of geotextiles by sampling and collecting existing experimental results at home and abroad for geotechnical fabric application engineering of the Yangtze River Jiepai and Hanjiang Waterway Regulation Experiment Dams. The durability of geotextiles commonly used in engineering. Keywords: geotextile; climatic conditions: aging test: durability.
polypropylene fabric durability
1 Overview From the early 1980s. A large number of geotextiles have been used in port and waterway projects, such as the Songhua River Shoal Group Renovation Project from 1989 to the present, the Hanjiang River Xiangfan to Hankou Reach Regulation Project, which was completed between 1990 and 1996, and the Yangtze River Boundary Card that began in 1994. The comprehensive remediation project of the river section has passed over 10 years. How is the current performance of geotextile used in the project? It is a matter of great concern to everyone. The durability of geotextiles refers to the stability of their physical and chemical properties. It mainly refers to the resistance to external factors such as ultraviolet radiation, temperature and humidity changes, chemical and biological erosion, freeze-thaw changes, and mechanical damage. The phenomenon of aging is mainly due to the fact that the high-molecular polymer has a chain structure and is affected by external factors, resulting in a degradation reaction or cross-linking reaction. Sunlight radiation plays an important role in various factors that cause the material to age. The research on anti-aging of geotextiles in China started late. In materials research, the simulation method is usually used to test and calculate. The chemical or textile department has conducted a large number of tests on the aging of plastics and fabrics in the artificial and outdoor climate, and accumulated a wealth of information. From the sampling test of on-site construction projects, a lot of work has been done at home and abroad. Abroad study of the anti-aging and durability of geotextiles has been extensively studied. The U.S. filter protection slopes on the Atlantic coast of Florida in 1958 have been 42 years old; France has 6 and 12 years of sampling test results, Germany has 15 years After the sampling test results, these research results further deepen the understanding of materials and promote the application of geotextiles. It has played a role in preventing the aging of geotextiles and adopting appropriate measures. I purchased the latest "Technical Report of Long-term Durability of Geosynthetics Based on Sampling of On-Site Projects"
polypropylene fabric durability
published in the United States. This report comprehensively analyzes 12 post-sampling mechanical and chemical tests in the United States. It is currently the most abundant detailed geotextile. Durability study data. In China, sampling inspections of existing geotextile application projects have been performed by many companies. The scope of spot inspections is not comprehensive. During the dry season, we conducted field sampling inspections on the geotextiles used in the test dams of the Hanjiang Waterway Regulation Project and the Wuhan Yangtze River Boundary Waterway Regulation Project to analyze the durability of the fabrics. 2 Anti-aging characteristics of geotextiles under natural climatic conditions The exposure of geotextiles under artificial and natural conditions is described in more detail in (1). The results of the outdoor exposure experiments in Hong Kong and Germany are summarized below. 2.1 Hong Kong Durability of geotextiles under outdoor exposure conditions Edward Geotextiles in 1987, Group 1 woven geotextiles and Group 1 composite geotextiles. For each fabric, a total of 16 unexpanded and sun exposures were performed in each of 8 groups of wide strip tensile tests in January, March, June and September, and a total of 1360 groups were completed. The test site is on the roof of the Hong Kong Fire Services Building. The test results are shown in Table 1. Sample color single thickness to peak intensity retention % Polymer type Construction type No. Color (IIIIn) January month March month (resistance) % % Non-woven hot stick 10304888,l 84.784.7 678 4B70%PP30% Polyethylene mouth E) + UV non-woven sticky white 187O. 86101.198.9 88.3 54.3 IA Polyester (PES) Acupuncture Non-woven Ash 162 1.52105.996.5 65.9 34.1 1B Polyester (Acupuncture Non-woven
Non-woven mask manufacturers
It uses high melting fat and polypropylene as raw materials, has good toughness, high filterability and soft hand feeling; high air permeability, high water pressure resistance, high strength, can block and block dust, particles, alcohol, plasma,