Folie 1 - PowerPoint PPT Presentation

Loading...

PPT – Folie 1 PowerPoint presentation | free to download - id: 3be6cf-NGQ3M



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Folie 1

Description:

Emerging Technologies For Geotextiles(Geosynthetics) * * Open shed insertion system DORNIER unique open shed insertion guarantees equal weft tension over the full ... – PowerPoint PPT presentation

Number of Views:262
Avg rating:3.0/5.0
Slides: 50
Provided by: technotex
Learn more at: http://technotex.gov.in
Category:
Tags: folie

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Folie 1


1
Emerging Technologies For Geotextiles(Geosynthetic
s)
2
Technical Textiles
3
Global market scenario for geosynthetics
  • Global market has grown to US 3000 Million in
    2009
  • Global growth of geosyntethics is estimated by 5
  • Geosyntethics account for 0,8 of the total
    technical textile segment
  • India
  • Geotextiles market is approx. RS. 226 crores
  • Rs. 105 crores imported production
  • RS. 121 crores domestic production
  • expected growth is 12, on long term up to 20

4
Geosynthetics
  • Geosynthetics is a generic term that is used to
    describe a product with at least one component
    manufactured of synthetic or natural polymer ,for
    use with soil, rock or other materials used in
    public works projects.
  • Types of geosynthetics
  • Geogrid
  • Geotextile
  • Geocomposite

5
Geosynthetics - Functions
  • Reinforcement-Improving mechanical properties of
    soil
  • Separation-Long term functionality of all
    structural layers is provided by the use of
    geosynthetic material between two dissimilar
    geotechnical materials to prevent mixing.
  • (Such requirement is there for roads railways)
  • Erosion control-To prevent the surface erosion of
    soil particles because of water/wind forces.

6
Geosynthetics - Applications
  • Reinforcement -
  • Basal Reinforcement/Ground stabilisation--Use of
    geosynthetic material for improvement of load
    bearing capacity.Geosynhetic materials are
    utilised to balance eneven settling,absorb
    loading forces reduce the thickness of
    expensive coarse grained material.
  • Supporting structures -Retaining walls Bridge
    Abutments While constructing supporting
    structures or steep embankments of soil, shear
    strength of which would be exceeded in normal
    circumstances. It is possible to achieve the
    required safety using horizontal reinforcement of
    embankment layers with geosynthetic
    material(geogrid or geotextile)
  • The face wall can be made of Concrete
    elements ( prefabricated blocks, panels).
  • It can also be made as a Soft Face ( by
    wrapped-around method).
  • Asphalt reinforcement-Asphalt layers have low
    strength,Glassgrids or geocomposites are used to
    increase the strength of the asphalt layer
    ensure its uniform distribution in larger areas.
  • They prevent formation sprading of
    reflex cracks by absorption of shear forces.

7
Geogrid
  • GEOGRIDS are geosynthetics formed by a regular
    network of integrally connected elements with
    apertures greater than 10mm to 100mm to allow
    interlocking with surrounding soil, rock, earth
    and other surrounding materials to function
    primarily as reinforcement

8
Geogrids woven grids for the use in roads, dams,
railways
A wide spectrum of manmade fibers and natural
fibers
9
Geogrids - Functions
  • Soil reinforcement
  • They are used primarily for soil reinforcement.
    Their strength can be greater than the more
    common geotextiles. Geogrids have a low strain
    and stretch only about 2 to 5 under load.
  • The most important characteristics of geogrids
    are high water drainage combined with exceptional
    mechanical strength and long term creep
    resistance.
  • 2. Soil stabilization

10
Geogrids - Applications
  • Soil reinforcements in embankments and walls
  • Subgrade stabilization

11
Uniaxial Geogrids - Applications
segmental block retaining walls, slope
reinforcement, pile cap platforms and base
reinforcement applications such as roads, car
parks and rail line construction.
Biaxial Geogrids - Applications
Equipped with dual directional strength combined
with the interlocking system, Merex BL products
are specially designed for foundation
applications.
12
Geogrids - Applications
Biaxial Geogrid Sub-grade Stabilisation
13
Geogrids - Applications
Biaxial Geogrid Ground Improvement for Tank
Foundation
14
Geogrids are open mesh but also closed
constructions
15
Geogrids - Applications
Biaxial Geogrid Installation of Geogrid at
balast level
16
Glassgrid-A type of Geogrid
The GlassGrid Pavement Reinforcement System
provides additional support to resist the
migration of reflective cracks in pavement
structures.
Cracks migrate toward surface in unreinforced
overlay.
Cracks are redirected in GlassGrid reinforced
overlay.
17
Glassgrid
  • Glassgrid is an exceptionally strong reinforcing
    material specially developed for pavements.
  • It consists of glass fibre strands arranged in a
    grid structure and covered with a polymer coating
    and a pressure sensitive adhesive.
  • Each strand has a remarkably high tensile
    strength and high modulus of elasticity at low
    elongation.
  • This combination of outstanding tensile strength
    and high modulus makes Glasgrid actually stronger
    than steel.

18
Geotextile
  • Geotextiles form one of the two largest group
    of Geosynthetics.
  • They are textiles in the traditional sense, but
    consist of natural fibers like jute, coir or
    synthetic fibers depending on the requirement,
    mainly whether biodegradation is desired or not.
  • These are fabric or cloth-like materials that are
    classified based on the method used to
    manufacture the fabric either woven or
    non-woven.

19
Geotextile - types
  • Woven monofilament

20
Geotextile - types
  • Woven multifilament

21
Geotextile - types
  • Woven Slit film

22
Geotextile
  • Woven Geotextile
  • Woven construction produces geotextiles with high
    strengths and moduli in the warp and fill
    directions and low elongations at rupture.
  • Woven construction produces geotextiles with a
    simple pore structure and narrow range of pore
    sizes or openings between fibers.
  • Woven geotextiles are commonly plain woven, but
    are sometimes made by twill weave or leno weave
    (a very open type of weave).
  •  
  • Woven geotextiles can be composed of
    monofilaments or multifilament yarns made up of
    PE,PVA,PP or natural textile material.

23
Geotextiles Mass per unit area - Fabric in
comparison with nonwovens
up to 5x higher
Source material report Hochschule Rapperswil
24
Geotextiles Elongation - Fabric in comparison
with nonwovens
Source material report Hochschule Rapperswil
25
Geotextile - Applications
  • Separation
  • Reinforcement

26
Geotubes -Main Applications
  • Dewatering solutions
  • Geotubes used in artificial Island projects
  • Shoreline (Coastal) protection

27
Geotubes
  • Dewatering
  • Solution

28
DORNIER weaving machines can contribute to an
efficient production of various types of
geosynthetics.
29
Geogrids in closed and open constructions ...
... used for geotextile and agriculture purposes
30
Online coating procedure on DORNIER rapier
machines
..offers stress- free insertion for all kinds of
yarns
31
(No Transcript)
32
Positive weft yarn handling through the entire
weft insertion
33
No guiding elements in the shed
34
Open shed insertion system
DORNIER unique open shed insertion guarantees
equal weft tension over the full fabric width,
minimum friction between warp and weft  
35
Main parameters for Geogrids
PP, PES, Glass, Jute,
material tensile strength mesh size
40 400 kN/m and more
10x10 mm 19x28 mm 31x31 mm
36
Example for Geogrid-Specification
material
mesh size
tensile strength
37
Example for Geogrid-Construction
x mm
Mesh size 20 x 20 mm
Web size in weft direction
Web size is not fixed in specification!
x mm
Web size in warp direction
38
Example for Geogrid-Calculation
1. Requested tensile strength of e.g. 109
kN/m 2. Requested textile type PET (Polyester
high tenacity) 3. Search for fiber type with high
tensile strength e.g. 82.5 cN/tex 4. Search for
standard yarn-types with parameters e.g. 1100
dtex 2200 dtex 5. Evaluation of the yarn tensile
strength e.g. 0.088 kN 0.176 kN 6. Evaluation
of number of threads e.g 1239 619 7. Addition
of 10 more threads for loss in
production 1362 681 8. Requested mesh size of
e.g. 20 x 20 mm 9. Preestimated width of the
web size 9 mm 6 mm 10. Evaluation of number of
meshes per meter here e.g. 34 38 11. Evaluation
of number of threads per mesh here
e.g. 27 14 12. Evaluation of the yarn-diameter
here e.g. 0.337 mm 0.477 mm 13. Exspected
Web-size in warp-direction here e.g. 9.1 mm 6.7
mm 14. With different patterns the web size can
be influenced End of the first run! Second
run! Pos. 9 - 13 Adjustment of the proportion of
mesh-size and web-size.
39
Geogrid-Construction
14 weft threads in double weft insertion (7
picks)
7 mm
Mesh size 20 x 20 mm
Web size in weft direction
Tolerance in mesh size /- 3 mm
14 warp threads
6 mm
Web size in warp direction
40
Geogrid made with Leno
leno thread
face side
reverse side
41
Online coating procedure on DORNIER rapier
machines
42
Coating-material as online coating is required in
most cases
  • PVC
  • Bitumen
  • Latex
  • Plastisol
  • Silicon

43
Glass fabric woven on DORNIER rapier or airjet
machines
44
Reinforcements for facades Glass roving 68 to
600 tex
45
Today and furture markets / building industry
  • reinforcement and repair of concrete components
  • silos / tanks
  • bridges / highway lanes
  • tunnels / tubes
  • Delicate structures and elements of facades
  • Vibration damping
  • Explosion protection / earthquake protection

Reinforcement of concrete support structures with
carbon grid fabrics and UD structures
46
Composition of glass yarn fabrics ...
... used as wall paper - fireresistand
47
Producers
  • Hüsker (D)
  • Propex (D)
  • Synteen/Lückenhaus (D)
  • Edilfloor (I)
  • Low Bonar (GB) (MehlerTexnologies gehört LB)
  • TenCate (NL)
  • Kordarna (CZ)
  • Stradom (PL)

48
DORNIER weaving machines are the most reliable
instruments having the widest potential for the
production of technical fabrics
49
(No Transcript)
About PowerShow.com