What is the use of non-woven geotechnic fabrics?

   Nonwoven geotextiles are ideal materials for maintenance and repair of asphalt pavements

  Road engineering is an important link in infrastructure construction and the main application of nonwoven geotextiles. In 2017, at the transportation work conference, new goals were put forward for road construction in 2017: 1.8 trillion yuan in fixed assets investment in road and water transportation, 5,000 km of new highways, more than 200,000 km of newly renovated rural roads, and new poverty 7,000 villages in the area have access to hardened roads.

  Nonwoven geotextiles play an indispensable role in the construction of a large number of road projects. First, non-woven geotextiles are ideal materials for the maintenance and repair of asphalt pavements. Non-woven geotextiles have the characteristics of high strength, uniform structure, small shrinkage coefficient, strong toughness, and large elongation. After being combined with asphalt by dipping or spraying, it can play the effect of waterproofing and reinforcement at the same time. Simple and durable on the road. Secondly, non-woven geotextiles can be used for stable reinforcement of weak roadbeds. During road construction, the non-woven geotextile is laid in the soft subgrade with high moisture content, which can prevent the transfer of tiny soil particles to the high-strength subgrade material, and at the same time discharge the water in the soil to prevent the soil from softening and loosening.

     In addition, geotextiles can repair pavement and delay reflection cracks. In road reconstruction, in order to solve the problems of damaged concrete pavement and enlarged expansion joints between concrete slabs, hot-melt polyester long-fiber geotextiles are selected. /m, transverse direction>9.5kN/m; 5% longitudinal tensile force ≥4.5kN/m, transverse 5% tensile force ≥5.0kN/m. After cleaning, leveling and filling the damaged pavement and expansion joints, the asphalt is spread, and the geotextile is spread evenly when the asphalt has not cooled down and still has adhesion, and then rolled with a tire roller until the two are closely combined, and sand is sprayed. , After paving the hot asphalt mixture, it is rolled to meet the requirements. The entire construction period is only 78d, with high efficiency and good quality.