Basalt fiber geotextile (geogrid) is a kind of semi-rigid products, which uses high-strength basalt fibers to produce gridding base material with advanced knitting process, and then treated by surface coatings. Both warp and weft directions are high tensile strength and low elongation. Breaking elongation is 3.1%. The properties are high-temperature resistance, cold resistance (-260?-650?), acid etching resistance , little creep, high strength, and little deformation. It is acid-resistant and alkali-resistant, low-temperature and high-temperature resistant, thermal and sound insulation. Its tensile strength is better than that of lager tows carbon fiber, and the breaking elongation is even better than small bunch carbon fiber. It has better compression strength, shearing strength, and applicability & aging resistance in severe environment, etc. Feature: 1. Can be used under super-low temperature and have good thermal stability 2. High tensile strength and low elongation 3. Good physical and chemical stability, strong resistance to biological erosion and climate changes. Application 1. Subgrade strengthening and pavement repairing for highways, railways and airports. 2. Subgrade strengthening of perpetual load bearing, such as large parking lots and cargo terminals. 3. Slope protections of highways and railways 4. Culvert reinforcing 5. Mines and tunnels reinforcing.