Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C11/00—Details of pavings
  • E01C11/16—Reinforcements
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D29/00—Independent underground or underwater structures; Retaining walls
  • E02D29/02—Retaining or protecting walls
  • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
  • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements

Definitions

• the invention relates to geosynthetics, such as geotextiles, geocomposite, geogrids (woven, rusted or monolithic tapes) and the like, which are used in the renovation or in the production of asphalt and concrete surfaces or in the production of earth reinforcements use and a function of storage to retrieve and track product, condition and project related data.
• geosynthetics such as geotextiles, geocomposite, geogrids (woven, rusted or monolithic tapes) and the like, which are used in the renovation or in the production of asphalt and concrete surfaces or in the production of earth reinforcements use and a function of storage to retrieve and track product, condition and project related data.
• Geosynthetics used for refurbishment and production of asphalt or concrete surfaces such as road construction, airport runways and the like are known.
• Such geosynthetics consist predominantly of polyolefins, such as polypropylene, polyethylene, their co-polymers or PVA mixtures, as well as polyester and glass. They are used in the form of geotextiles, geocomposite, geogrids and the like.
• the geosynthetics is used in the substructure in the construction of the asphalt or concrete driving surface, in particular for fixing the substrate and for drainage.
• the use of geosynthetics in the asphalt or concrete surface prevents the ingress of rainwater and reduces the bending tension between the ceiling and the substrate. Reflection cracks, as well as the crack propagation in the asphalt or concrete pavement is reduced.
• the use of geosynthetics causes a reinforcement of the entire construction.
• the object of the invention was to provide geosynthetics for use in the rehabilitation or production of asphalt or concrete surfaces, which additionally provide the opportunity to store product-related or condition-related data. This data should also be available.
• the invention therefore relates to geosynthetics, such as geotextiles, geocomposites or geogrids, characterized in that the geosynthetic material has a transponder applied thereto for storing and retrieving product and / or status-related data.
• the geosynthetic material preferably consists of thermoplastics, in particular polyolefins, such as polypropylene, polyethylene, their co-polymers or blends or blends or PVA, of polyester and glass and mixtures thereof.
• polyolefins such as polypropylene, polyethylene, their co-polymers or blends or blends or PVA, of polyester and glass and mixtures thereof.
• nonwovens are used from endless thermoplastic threads.
• the thermoplastic threads are, for example, threads of polypropylene, polyamides or polyester.
• the nonwovens may be mechanically drawn and / or needled or thermally bonded.
• Commercially available products such as products from the Polyfelt® PGM group, Polyfelt TS, Polyfelt Rock PEC, Polyfelt Rock G and the like are particularly suitable, for example.
• the transponders are self-adhesive and at least 2 transponders per roll are applied.
• any data storage can be introduced, which are wireless, that is readable via an air interface.
• passive transponders are used, which have as electronic components an antenna, possibly with voting elements, and compact electronics, for example in the form of a chip.
• the electronics comprise an analogue receiving and transmitting circuit with a downstream digitizer and data processing unit. This relies on a memory that can contain immutable as well as changeable data.
• the electronics are fed with energy from the communication field, which is also picked up by the antenna. This eliminates the need for the passive transponder own battery supply. This has the particular advantage that the transponder consists of a minimum number of components, so that it is inexpensive to produce, robust for the application described here can be configured, ultimately in large numbers for the application described here is available.
• the transponder preferably used therefore comprises a base layer of preferably (but not necessarily) polyester film with thicknesses typically around 50 ⁇ m. Then a structured metallization is applied, which acts as an antenna. On the ends of the antenna is the electronic circuit, in this case a silicon RFID chip contacted. This contacting can be carried out in many ways. Preferably, the "flip-chip” technology is used. The chip is also adhesively bonded mechanically to the antenna structure / base material by means of a liquid or pasty adhesive called “underfiller", whereby the mechanical load capacity is also considerably increased after curing.
• underfiller a liquid or pasty adhesive
• the transponder assembly for the application described herein includes an adhesive beneath the base material and mechanical protection above the antenna / chip structure.
• the mechanical stress of the transponder when using the geosynthetics, as well as the later remaining in the rock are high for the transponder chip. Selective pressures can lead to decocking of the chip from the antenna or chip breakage.
• the mechanical protection has therefore the task to derive the loads over a large area of the chip. In general, rigid enclosures are conceivable. On the other hand, however, speak the elaborate production and the strong application of such transponders. Flat transponder labels are more suitable because they are specially designed for the application described here.
• any type can be used, which firmly bonds the polyester film with the geosynthetic and meets the mechanical and thermal requirements in the processing of geosynthetics.
• Special Adhesive adhesives have proven to be advantageous when contacting the Transponders with the geosynthetics immediately enter a solid bond without further hardening.
• acrylate adhesives come into consideration.
• a special resin modification allows the bonding on the above-mentioned low-energy Geobuchstaffobervid.
• a greater thickness of eg 200 ⁇ m compensates for the textile surface roughness and ensures full-surface bonding. Its suitability over a wide temperature range (eg from -40 ° C to 120 ° C for a short time up to 160 ° C) guarantees bonding in all weathers and also during processing of the geosynthetic material in the asphalting area.
• a further enhancement of the protection of the electronics can be achieved from combinations of this potting protective layer with underlying cover films. It shows that a PET film with a thickness of 50 ⁇ m already represents a good barrier for rock tips penetrating deep into the casting compound.
• An essential factor for the reading range is the antenna surface of an HF transponder. It determines the sensitivity and thus possible Reading distances.
• the latter are used in this application together with larger transponder antennas
• transponders of double credit card format 1 m read distances can be ensured.
• ranges for storage can fall about 10 to 20% to the previous values.
• the specified distances are still sufficient to detect transponders in the middle of asphalt or concrete floors.
• RF transponders have different memory scopes. Common to all is a mostly 8-byte long unique identification number, which is invariably programmed by the chip manufacturer. In addition, depending on the type of chip, users today have an additional 32 to 1024 bytes or more of user memory available.
• Product data and status data are then stored on a transponder. For example, data about the type and amount of geosynthetics and building materials used, layer thicknesses, traffic load, road conditions, climatic conditions, quality indicators and the like can be stored.
• the geosynthetics for the manufacture and / or remediation of damage such as cracks and the like installed in existing asphalt and concrete ceilings.
• the geosynthetics is also used in new constructions.
• a support layer usually a cement-stabilized gravel sanding layer is produced.
• the geosynthetics is laid and optionally applied a binder, or laid the geosynthetic material directly into the binder.
• the application of the new asphalt or concrete pavement can take place.
• the geosynthetic is laid so that between the webs of geosynthetics both an overlap, as well as no overlap occurs.
• the geosynthetics are applied in an analogous manner to the old surfacing, which may optionally be partially removed, and then the new surfacing is applied using the geosynthetic material as described above.
• the data stored on the transponder can now be queried in the course of inspection trips or checks, compared with the data determined during these journeys, and the newly determined data can be stored again on the transponder.
• the abrasion or wear of an asphalt or concrete pavement can be determined as a function of the load and the period of the load.

Landscapes

• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Civil Engineering (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Environmental & Geological Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Architecture (AREA)
• Mining & Mineral Resources (AREA)
• Paleontology (AREA)
• General Engineering & Computer Science (AREA)
• Road Paving Structures (AREA)
• Laminated Bodies (AREA)
• Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Priority Applications (5)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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Citations (5)

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• 2005
  • 2005-12-19 EP EP05027723A patent/EP1798340A1/fr not_active Withdrawn
• 2006
  • 2006-12-15 CN CNA2006100639877A patent/CN1986967A/zh active Pending
  • 2006-12-19 US US11/640,908 patent/US7872580B2/en not_active Expired - Fee Related
  • 2006-12-19 ZA ZA200610692A patent/ZA200610692B/xx unknown
  • 2006-12-19 AU AU2006252119A patent/AU2006252119A1/en not_active Abandoned

Patent Citations (5)

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