Prs Mediterranean, Ltd.

Geotech Technologies Ltd.

Oded Erez

Izhar Halahmi

Adi Erez

Offer Avraham Zvi Kief

Certain pavement systems and methods for paving are suitable for locations containing a generally weak subgrade with a California Bearing Ratio of four (4) or lower. The pavement system includes a first geogrid layer placed directly on the subgrade; a first granular layer upon the first geogrid layer, the first granular layer having a thickness of from 0.5 times to 20 times the aperture distance of the geogrid layer; a first geocell layer upon the first granular layer comprising a geocell and an infill material; and a capping layer over the geocell layer. A second geocell/geogrid layer can be placed beneath the capping layer, if desired. An optional surface layer may be applied upon the capping layer if desired. The resulting pavement system provides long-term support for pavements applied over the pavement system.

Pavement systems with geocell and geogrid

Geocells for moderate to low load applications are disclosed here. The geocells have a cell wall thickness of from 0.25 mm to 0.95 mm. They have a wall strength of from 3500 N/m to 15000 N/m.

Geocell for moderate and low load applications

Certain pavement systems and methods for paving are suitable for locations containing a generally weak subgrade with a California Bearing Ratio of four (4) or lower. The pavement system includes a first geogrid layer placed directly on the subgrade; a first granular layer upon the first geogrid layer, the first granular layer having a thickness of from 0.5 times to 20 times the aperture distance of the geogrid layer; a first geocell layer upon the first granular layer comprising a geocell and an infill material; and a capping layer over the geocell layer. A second geocell/geogrid layer can be placed beneath the capping layer if desired. An optional surface layer may be applied upon the capping layer if desired. The resulting pavement system provides long-term support for pavements applied over the pavement system.

A perforated geocell is made from a plurality of strips that form cells. Each cell wall has a single pattern of perforations spaced evenly over the cell wall. This avoids uneven distributions of stress over the cell wall, reducing deformation of the geocell.

Perforated geocell

Disclosed are geotechnical structures formed from a geosynthetic article and an encapsulated granular material dispersed within or upon the geosynthetic article. In particular embodiments, a geocell is used as the geosynthetic article. Among other things, the geotechnical structures can be used for forming roads, parking lots, paved surfaces, as well as road beds and foundations for highways or railroads.

Geotechnical structures and processes for forming the same

Disclosed are creep resistant articles having a polyolefin in a continuous phase and fibrils or lamellae of polyester, polyamide, or mixtures thereof dispersed in the continuous phase.

Creep resistant article

A retaining wall comprises a plurality of layers made from geocells. The retaining wall has a capping layer at the top of the wall, wherein the ratio of the length of the capping layer to the height of the retaining wall is at least 0.8. The retaining wall also has at least one stacking layer and may further comprise a reinforcing layer made of geogrids or, preferably, geocells. The reinforcing geocells have a height that is less than the height of the capping layer geocell.

Earthquake resistant earth retention system using geocells

A composite system comprises a base layer, a capping layer, and at least one core geocell layer. The base layer and capping layer are staked below and above the core geocell layer, which is infilled with a low quality material. In specific embodiments, the base layer and capping layer are each geocells infilled with a high quality material. This composite system meets engineering specifications economically.

Sandwich system

The present disclosure generally relates to a polymeric cellular confinement system which can be filled with soil, concrete, aggregate, earth materials, and the like. More specifically, the present disclosure concerns a cellular confinement system characterized by improved durability against damage generated by UV light, humidity, and aggressive soils, or combinations thereof.

UV resistant multilayered cellular confinement system

A geocell is disclosed that has high strength and stiffness, such that the geocell has a storage modulus of 500 MPa or greater at 23&#xb0; C.; a storage modulus of 150 MPa or greater at 63&#xb0; C. when measured in the machine direction using Dynamic Mechanical Analysis (DMA) at a frequency of 1 Hz; a tensile stress at 12% strain of 14.5 MPa or greater at 23&#xb0; C.; a coefficient of thermal expansion of 120&#xd7;10/&#xb0; C. or less at 25&#xb0; C.; and/or a long term design stress of 2.6 MPa or greater. The geocell is suitable for load support applications, especially for reinforcing base courses and/or subbases of roads, pavement, storage areas, and railways.

Geocell for load support applications

The present invention discloses cellular confinement systems (CCSs) with improved friction with infill at low normal pressure. The invention especially presents novel flaps-containing CCS that includes inter alia a plurality of elongated strips arranged in a side by side pattern, each of the strip is segmentally bonded to an adjacent strip in spaced-apart bonding areas, said bonding areas alternating between the sides of each of said strips, such that when the system is stretched across its width, the strips curl to form a web of cells confined by cell walls disposed between the bonding areas, wherein at least one of the cell walls comprises at least one flap hinged to the wall and friction between the walls and the infill material increases.

Cellular confinement system

A process is provided for producing a compatibilized polymeric blend. A first thermoplastic polymer and a reactive moiety are provided to a progressive melt kneading apparatus. The reactive moiety comprises a first reactive group capable of reacting with the first thermoplastic polymer but not a second polymer and a second reactive group capable of reacting with the second polymer but not the first polymer. The first thermoplastic polymer and the reactive moiety are then melt kneaded so that the first reactive group reacts with the first thermoplastic polymer and the second reactive group is grafted to the first thermoplastic polymer, forming a molten self-compatibilizer. A molten second polymer is then provided. The molten self-compatibilizer is melt kneaded with the molten second polymer so that the second reactive group reacts with the second polymer to form a compatibilized polymeric blend. Also provided are articles formed from the compatibilized polymer blend.

Growing community of inventors

Tel Aviv, Israel

Oded Erez