Knowledge of Geotechnical Materials
Geotechnical materials are now widely used in geotechnical engineering geosynthetics, it is the general term of polymer products. As early as the 1920s, the chemical industry department successfully produced synthetic materials, but it was not until the late 1950s that this material was gradually popularized as a new type of building material in geotechnical engineering. Early products were mainly water-permeable woven and non-woven geotextiles, and later impermeable geotextiles were produced. With the improvement of engineering practice and manufacturing technology, geogrid and other combination products with high imposition bar have been manufactured successively.
In this way, the original word “geotextile” has been far from summarizing the meaning of all kinds of products, so there are many alternative names in the world, among which the word “geotextile” is the most common, but it is still commonly known as a geotextile. Geotechnical materials are divided into several categories: geotextile, HDPE geomembrane, geogrid, dimple drainage board, composite geomembrane, geonet, geocell, bentonite waterproof blanket (GCL), etc.
Among them, glass fiber geogrid is a new type of excellent geotechnical base material to strengthen the pavement and roadbed. The product is made of alkali-free glass fiber filament as the main raw material, woven by unique warp knitting technology, and coated by special glue. It can effectively improve the stress distribution of the road structure, resist and delay the occurrence of reflection cracks caused by the grassroots cracks, improve the service life of the road, reduce the cost and improve the construction quality. The product is a new kind of patent products, the company launched the coated fiberglass geogrid since the pressure sensitive adhesive is handled and become, in keeping the glass fiber geogrid on the basis of the features and functions, make the grille and contact surface together, has the characteristics of convenient construction, paving leveling, especially suitable for highway construction, road surface reinforcement, reinforcement of the old road reconstruction and other projects.
Composite geotextile is to use glass fiber or high-strength polyester fiber yarn with nonwoven fabric by warp knitting weaving or glue them into a new type of composite geotextile materials, organically combined with the glass fiber and nonwoven fabric both excellent properties, besides being of geogrid have high strength, low elongation, high elastic modulus, heat resistance, and other features, also has a good ability of anti permeability and filter is a kind of multi-functional geosynthetic materials, can effectively prolong the service life of the project, reduce the maintenance frequency, reduce the engineering cost, is suitable for road pavement subgrade engineering and water conservancy dike reinforcement enhancements and isolation protection.
High strength polyester fiber geogrid is a new type of high quality geogrid material to strengthen the roadbed. It is made of high strength polyester fiber or polypropylene fiber as raw material through warp knitting directional weaving and special process of dipping and coating. With high tensile strength and low elongation, it can effectively prevent road cracking in roadbed engineering, improve the bearing capacity of soft soil foundation, prevent foundation settlement, reduce project cost, improve construction efficiency, and thus improve the quality and service life of highway, railway, and other projects.