ateromponents &uildingupply, Inc.

PRODUCT DESCRIPTION

Miragrid T and XT are high strength, high tenacity, high molecular weight polyester geogrids in a full range of wide width tensile strengths to meet the most demanding applications of soil reinforcement. Mirogrid T geogrids are knitted, then coated with a durable polymer coating to provide dimensional stability and protection from installation damage. Mirogrid T geogrids have cross direction strengths which allow biaxial reinforcement to be utilized.

Miragrid XT geogrids are woven and then coated with a polymer coating to provide dimensional stability and protection against installation damage. Miragrid XT geogrids are unioxial with the highest tensile strengths of any reinforcement geogrid in the industry. The high molecular weight, high tenacity polyester yarns used in the Miragrid geogrids result in excellent creep resistance. The high molecular weight polyester fibers are also resistant to the potential degrading effects of hydrolysis and chemical attack for the range of pH normally encountered in reinforced soil environments.

APPLICATIONS

Miragrid geogrids are used in a wide variety of soil reinforcement applications including internally reinforced soil walls, segmental retaining wall reinforcement, steep reinforced slopes, and reinforcement in a variety of landfill applications including potential voids bridging and veneer stability. Applications where long term design strength is necessary for the stability of the structure are ideal applications where Miragrid geogrids can be used.

ADVANTAGES

• No recoiling - remains in place aher being installed; does not roll back.
• Flexible and tough - delivers immediate soil geogrid stress transfer ensuring minimal movement of soil structure.
• Lightweight- at least 33% lighter than most rigid geogrids
• Cost effective - creep resistant polyester fibers provide a higher allowable tensile strength, minimizing the required number of geogrid layers.
• High Long Term Design Strengths (LTDS) - Miragrid’s long term design strengths are backed up by more than 30,000 hours of tension creep testing performed at an outside, independent test laboratory so you can be assured of credible, dependable long term design strengths.
• Easy handling - no sharp edges which may injure workers.
• Wide rolls - rolls are triple the width of most rigid geogrids, significantly reducing placement time thus lowering cost.
• Custom fabrication of rolls - fabricated to the specific requirements of the project.

INSTALLATION GUIDELINES

Before placing Miragrid geogrids, the surface should be cleared of all debris and the foundation base proofrolled. The grids should be rolled out, cut to length, thus eliminating field connections; and laid at the proper elevation, location and orientation. Since geogrids vary in strength with roll direction, Miragrid should be laid in the direction of main reinforcement.

After being rollied out, the material should be tensioned by hand until it is rigid, free of wrinkles, and lying flat. Adjacent geogrid rolls may be abutted together side-by-side without overlap. Splices should be avoided.

Certain fill placement procedures may require the reinforcement to be held in place by sandbags or fills, as directed by an engineer. A razor blode, sharp knife or scissors may be used to cut the material. Fill placement should follow the standard practice, or as defined in the project specifications or directed by the engineer. Care should be taken to prevent wrinkles and/or slippage of reinforcement during fill placement and spreading.