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They
prevent dissimilar materials like base stone and subsoils
from mixing, weakening a structure. |
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They
provide inherent tensile strength to hold a structure
together. |
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They restrain soils from movement while allowing free
passage of water through and along the plane of the fabric.
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Charm
is the support and filter fabric engineers can specify
with confidence because Charm is designed to be
the "permanent" solution to problems involving construction
in wet or unstable soils. The fabric effectivley separates
aggregate from subsoil, filters surplus water, and provides
tensile reinforcement to maintain the integrity of the
structure. |
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The
right material "polypropylene": Charm is made from
pure polypropylene, a readily available petrolium based
polymer that is chemically and biologically inert. Consequently,
Charm will not decompose in soil due to bacterial
or fungal action. In normal use it is also unaffected
by ultraviolet light, acids, alkalis, oils and most
chemical solvents, And it resists wear, tear, puncture,
and abrasion. In short, it's permanent.. Totally maintenance
free. |
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The
Right Cost: Saves money in three ways: |
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1. |
During
purchase Charm can be specially ordered to the
length, width, and grade thickness required for particular
job. There is no cutting.. no waste. |
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During
installation Charm can be rolled out quickly by
hand, requires no skilled labour, and eliminates costly
materials, such as graded aggregate. |
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Maintenance:
Since Charm is permanent, it eliminates costly
maintenance and its associated materials, labour, and
equipment. |
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| Consider
all the advantages: total installed cost, easy installation,
long service life. Charm... the geotextile that engineers
can specify with confidence. |
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Charm provides inherently stronger track system that lasts
longer, requires little maintenance, and produces a net
cost savings. For new track or repairs, there's no need
to remove native soil. Install Charm directly on
the subgrade and eliminate contamination from below the
ballast.
Charm bonds tightly between ballast and subsoil,
preventing fine soils from pumping upwards and contaminating
the ballast. Its coarse texture also prevents train action
from pumping soils laterally, causing the track surface
to drop.
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ballast and subgrade effectively reinforces the rail bed. Drains
water quickly so that ballast remains dry and functional. In
Railroad applications, toughness and permeability are critical
factors due to the dynamic loads imposed by 100 tonne and 200
tonne locomotives. Charm has necessary tensile and elongation
properties to spread these track loads over a large area thus
reducing the unit pressure on the soil. This not only increases
the load carry capacity of railbed, but it also evens out the
dynamic loads and lessens the tendency of the track to become
centerbound -- a condition in which the soil at the centre of
the track loses its stability. |
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Charm
is installed beneath riprap and armour rock to prevent
erosion of under soils. The fabric economically replaces
granular filter materials which are costly and frequently
difficult to replace. It fulfils both as a filter to allow
water to move in either direction, depending on water
elevation.
For stream banks and other areas with wave action, the
fabric is toed-in at the bottom and the rock placed directly
on the fabric. For coastal location where there is severe
wave action, the fabric should be covered with a 3 to
5 inch layer of rock or sand (bedding) to protect it from
puncture during installation of the fabric. |
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| Charm
is easier to handle and installs more quickly than graded
aggregate in projects involving streambank and shore protection.
The fabric also drains more quickly and prevents static
buildup that can undermine an embankment and cause slides.
For silt fencing applications, Charm provides and inexpensive
temporary structure meeting local construction codes,
outperforming and outlasting such materials as burlap
and straw bales. |
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Access roads, forestry/mining
operations, construction sites, and industrial work areas. Logging,
minning, oil and construction have one thing in common. They
use some of the heaviest equipment available generally in remote
locations, all subjects to the worst ravages of nature. Yet
all too often, the surfaces and work areas associated with operations
are designed to be temporary in nature -- board roads and gravel-top
surface that quickly sink and become unusable in wet weather.
Charm can be effectively & economically used in the
making of unpaved surfaces permanent. Placed directly over the
soft soil, the fabric prevents overlying aggregate and board
surfaced from sinking, keeps subsoils from pumping upwards,
and permits water to drain through and along the plane the fabric.
As a result, the surface remains clean, dry, and intact.
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Roads, highways, parking lots, storage areas, airport runways/taxiways.
The strength of pavement is largely dependent on the quality
and stability of the subgrade. The bearing capacity of these
soils rapidly diminishes as they become saturated with water.
Ultimatley, the wet soils work their way up into the base course,
causing the pavement to give away.
Charm strengthens paved surfaces by setting up a separation
barrier between subsoil and base, permitting free water to drain
quickly, but preventing soils from moving into the base. The
fabric also adds tensile reinforcement to the pavement permitting
heavier wheel loads while substantially reducing maintenance.
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Charm
Saves..
Charm provides a longer lasting, better quality surface while
allowing a 25 per cent reduction in base course aggregate. For
comparatively thin pavements, like parking lots, Charm
substantially increases their capacity to handle the heavy wheel
loads imparted delivery trucks and other occassional heavy traffic.
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Roads, Highways, Airport runways/taxiways. Charm has been found to
be an effective reinforcement material for the resurfacing of
cracked or broken pavement. The fabric, impregnated with liquid
asphalt adhesive, is installed over the old concrete or asphalt
pavement where it forms a tight seal with the new asphalt over
lay. Charm extends the life of the pavement by spanning the
cracks and preventing them from propagating through to the new
surface.
An important characteristic for proper resurfacing is good adhesion
between the old and new surface. Charm's permeable structure
provides sufficient pore space to hold the liquid asphalt and
prevent it from being squeed out during rolling. The fabric,
in combination with adhesive, also forms a membrane that helps
protect the base structure from seepage due to surface water,
air and de-icer salts. CHARM |
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Charm
Saves...
Charm high tensile strength permits resurfacing with approximately
half the normal thickness of asphalt. This is an important consideration
when resurfacing older built up pavements. Charm permits a thinner
resurfacing layer that preserves the nominal curb height and
postpones the time when the entire surface must be removed and
a new wearing course installed.
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Trench drains, highway shoulder drains, blanket drains, structural
drains. Water is the mortal enemy of construction projects.
Uncontrolled and unchanneled, it can damage pavements, undermine
a building foundation, and cause slopes to fail. Charm's uniform
pore size and relatively thick cross section make it an ideal
filter medium, conducting water freely but restraining soil
movement. With Charm, drain sizes can be reduced by eliminating
the graded aggregate filter. Consequently, less excavation and
aggregate are required to construct the drain.
Charm Saves...
Charm dramatically reduces the cost of subsurface drains
used along roadways, railbeds, parking lots and building foundations.
The conventional drain consists of a perforated collector pipe
surrounded by well-graded aggregate layers and sometimes an
outer layer of filter sand. The Charm drain substitutes coarse
open stone for the well-graded aggregate and sand filter system,
thereby reducing the total materials needed. |
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Logging roads, mine haulage roads. Access in
steep, mountainous terrain is often provided only by roads cut
into the side of a hill. Traditional methods call for constructing
a retained soil wall using earth fill with timber or pile reinforcing.
Charm economically replaces this method of construction and
combines ease of installation with excellent drainage characteristics.
Construction with Charm consists of placing alternate layers
of fabric and earth fill. The edge of each fabric layer is folded
back around a soil berm and lapped to next layer to form a wall
face.
Charm offer the strength of conventional reinforcement while
providing other advantages, its relatively thick permeable cross
section provides an avenue for drainage, its coarse
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texture
allows the water to flow out of the soil and prevent slippage,
and its elongation enables it to conform to the irregularities,
so that soils can compact and reach their full strength. Elongation
combined with high tensile strength give Charm the necessary
toughness to withstand tearing and puncture during installation.
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Underliner for tailings ponds,
liquid waste holding ponds, and water reservoirs. Lining a storage
pond with an impermeable membrane is the most efficeint means
of safeguarding against leakage. For years flexible membrane
liners have been used in conjunction with a treated sand base.
Recently, Charm has been found to be a more economical replacement
for treated sand providing other tangible benefits. Charm when
installed under the impermeable of storage ponds, protects the
membrane from being punctured by sharp rock action and vents
gases that would otherwise build up and cause the liner to rupture.
When installed over old concrete tank surfaces, Charm spans
cracked and spalled areas and protects the membrane from abrasion.
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Charm
Saves...
Charm acts as a protective cushion for storage ponds, replaces
treated sand, better gas ventilation, and improves the integrity
of the pond embankments. The fabric is easy to install and,
where sand is expensive or not readily available provides superior
installation at substantially less cost. Charm also provides
a dirt free sanitary environment for installation of the liner,
and reduces the amount of overlap in the membrane strips, providing
further economic benefits. |
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