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GEOSYNTHETICS IN TEXTILES - a tool for civil engineering application

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GEOSYNTHETICS IN TEXTILES - a tool for civil engineering application By Shraddha K. Akarte Monu W. Chandpurkar GOVT. POLY., NAGPUR * WHAT ARE GEOSYNTHETICS ? – PowerPoint PPT presentation

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Title: GEOSYNTHETICS IN TEXTILES - a tool for civil engineering application


1
GEOSYNTHETICS IN TEXTILES - a tool for civil
engineering application
  • By
  • Shraddha K. Akarte
  • Monu W. Chandpurkar
  • GOVT. POLY., NAGPUR

2
WHAT ARE GEOSYNTHETICS ?
  • Geosynthetics
  • are defined as civil engineering materials
    that are synthesized for use with geological
    materials like soil, rock or any other
    geotechnical engineering related material to
    improve or modify the behavior of civil
    engineering works.

3
Families of Geosynthetics
  • Geotextiles
  • Geogrids
  • Geomatrices
  • Geomembrane
  • Geosynthetic clay liner
  • Geofoams
  • Geocell
  • Geocomposites

4
GEO-TEXTILE
  • Woven, non-woven or
  • knitted, permeable sheets,
  • usually, but not exclusively,
  • non-biodegradable.
  • Landscape fabrics used in the
  • horticultural and soft-landscaping trades.
  • Flexible, textile-like fabrics of controlled
    permeability used to provide filtration,
  • separation or reinforcement in soil, rock
  • and waste materials

5
GEOGRIDS
  • Tough, non-woven synthetic sheets with large
    (100mm) rectanglar holes.
  • Used for ground stabilisation. Also known as
    geo-nets.
  • Stiff or flexible polymer
  • grid-like sheets with large apertures used
    primarily as reinforcement of unstable soil
    and waste masses

6
GEO-MATRICES
  • Geo-matrices can be thought of as 3-dimensional
    geo-grids, in that they are cellular and used to
    stabilise surface soil, gravels etc.
  • More commonly used as a form of Grass Paving

7
GEO-MEMBRANE
  • Impermeable and usually non-woven,
  • use as a vapour or damp barrier.
  • used as barriers for liquid or solid waste
    containment

8
GEOSYNTHETIC CLAY LINERS
  • Prefabricated bentonite clay layers incorporated
    between geotextiles and/or geomembranes used as a
    barrier for liquid or solid waste containment
  • GCLs used as a composite component beneath a
    geomembrane or by themselves in geo-environmental
    and containment applications as well as in
    transportation, geotechnical, hydraulic, and many
    private development applications.

9
GEOFOAMS
  • A product created by a polymeric expansion
    process resulting in a foam consisting of many
    closed, but gas-filled, cells

10
Three-dimensional honeycombed cellular
structures that form a soil confinement system
when infilled with compacted soil.
GEOCELLS
11
GEO-COMPOSITES A sheet
that combines two or more layers of
geo-synthetics.
12
Materials Used for GEOSYNTHETICS
  • Polyester
  • Polypropylene
  • Polyethylene
  • Polyamide
  • Nylon
  • Polyvinyl Chloride (plasticized or
    non-plasticized)

13
APPLICATIONS OF GEOSYNTHETICS
  • 1. Separation
  • 2. Reinforcement
  • 3. Filtration
  • 4. Drainage
  • 5. Moisture barrier (when impregnated)

14
Separation
15
REINFORCEMENT
16
DRAINAGE
17
CONTAINMENT Involves geomembranes, geosynthetic
clay liners, or some geocomposites which
function as liquidor gas barriers.
18
TYPES OF GEOTEXTILES
  • WOVEN
  • An excellent tensile strength ,poor abrasion
    resistance and dimensional stability.
  • Low coefficient of permeability
  • Poor surface frictional characteristics.
  • NON-WOVEN
  • ability to elongate locally to resist damage,
  • Better permeability and frictional resistance
  • tensile strength is lower than woven fabrics.
  • KNITTED
  • rarely used as geotextiles.

19
TYPES OF GEOTEXTILES
  • WOVEN GEOTEXTILES
  • NON-WOVEN GEOTEXTILES
  • MONOFILAMENT
  • MULTIFILAMENT
  • TAPE
  • THERMO BONDED
  • NEEDLE PUNCHED
  • SPUN BONDED

20
woven monofilament calendered
woven monofilament
woven multifilament
woven slit film
nonwoven needle-punched nonwoven
heat-bonded
21
APPLICATION OF GEOSYNTHETIC
  • Hydropower construction
  • Environmental engineering
  • Railway construction
  • Road construction
  • At seaports and airports
  • Mine construction
  • In urban construction

22
ADVANTAGES OF GEOSYNTHETICS
  • The manufactured quality control of geosynthetics
    in a controlled factory environment over outdoor
    soil and rock construction.
  • The thinness of geosynthetics versus their
    natural soil counterpart as light weight on the
    subgrade, less airspace used, and avoidance of
    quarried sand, gravel, and clay soil materials.
  • The ease of geosynthetic installation in
    comparison to thick soil layers (sands, gravels,
    or clays) requiring large earthmoving equipment.

23
ADVANTAGES OF GEOSYNTHETICS
  • Well advanced published standards in
    standards-setting organizations like ISO, ASTM,
    and GSI.
  • Design methods are currently available in that
    many universities are teaching stand-alone
    courses in geosynthetics or have integrated
    geosynthetics in traditional geotechnical,
    geoenvironmental, and hydraulic engineering
    courses.

24
PRESENT INVENTION TO GEOSYNTHETICS
  • Rolled erosion control products have been
    classified generally (and frequently imprecisely)
    into several categories
  • Erosion control nets
  • Open weave erosion control geotextiles
  • Erosion control blankets
  • Geosynthetic mats

25
Recently, the Erosion Control Technology
Council, which is an organization formed by
rolled erosion control products providers,
initiated more formal classification for these
sorts of products. The categories include -low
velocity degradable rolled erosion control
products ("LVDRECP's"), - high velocity
degradable RECP's ("HVDRECP's"), -long term
nondegradable RECP's ("LTNDRECP's").
26
OBJECTS OF PRESENT INVENTION
  • to provide low cost geosynthetic structures which
    may be used for erosion control, turf
    reinforcement, earth reinforcement and a broad
    variety of other applications.
  • to provide geosynthetic structures which may be
    economically manufactured such as on conventional
    carpet tufting machinery, and whose properties in
    all three dimensions may be varied by changing,
    among other things,
  • to provide erosion control, turf reinforcement
    and earth reinforcement structures which employ
    and capitalize on the favorable properties of
    geosynthetic

27
WORLD MARKET FOR GEOSYNTHETICS
  • World Geosynthetics to 2013
  • Global demand for geosynthetics is projected to
    increase 5.3 percent annually through 2013.
  • China will account for the largest share of new
    global demand as it continues to develop
    large-scale infrastructure and erosion control
    projects.
  • North America will remain the second largest
    regional market. Geogrids will achieve the
    fastest gains.

28
CONCLUSION
  • It is expected that the use of geosynthetics will
    become increasingly routine, and that
    geosynthetics will be the standard material of
    choice for several applications.
  • Use of geosynthetics in pavement structures (to
    perform the functions of separation,
    filtration,drainage, and reinforcement) should
    increase significantly in the new millennium as
    the benefits of these materials are quantified.
  • In addition, the versatility and usage of
    geosynthetics will be enhanced with the
    development and adoption of in situ and rapid
    soil testing procedures.

29
Soccer Dome - Outside
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Soccer Dome- Inside124 x 228 x37
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THANK YOU
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