Geocells have three-dimensional celllike structure made from reinforced HDPE sheets by strength welding. They are usually made by ultrasonic pin type welding. Sometimes there are holes punched on the membranes for the requirements of engineering. They are elastic and shrinkable when transported. They can be stretched into shape of net. When geogrids are filled with bulky material like soil, rubble and concrete, a structure with high sidewise restraint and high rigidity forms. They have light weight, good wear resistance, chemical stability, photooxidation resistance, aging resistance, acid resistance and alkali resistance. They can be used in different soil conditions like soil and desert. They can be used to reinforce the roadbeds of highways and railways. They can be used to protect slopes and construct mixed barricades.
Geogrids are 2D latticed grids or three-dimensional screen grids made from high-molecular polymers like polypropylene and PVC (polyvinyl chloride) by thermoforming or mould pressing. They are applied in the field of civil engineering. Geogrids are often used as tendon material of reinforced soil structure or of other composite materials. Geogrids can be divided into four categories, namely plastic geogrid, steel geogrid, glass fiber geogrid and polyester warp knitting dacron geogrid. Geogrids are used to reinforce all kinds of dams, roadbeds, side slopes, tunnel walls, and permanent bases of large airports, parking lots, wharfs, freight yards, etc. Geogrids are easy to install. They are time saving, labor saving with shorter construction time and lower maintenance cost.
