They prevent dissimilar materials like base stone and subsoils from mixing, weakening a structure.
  They provide inherent tensile strength to hold a structure together.
  They restrain soils from movement while allowing free passage of water through and along the plane of the fabric.
  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.
 
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.
The Right Cost: Saves money in three ways:
  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.
  2. During installation Charm can be rolled out quickly by hand, requires no skilled labour, and eliminates costly materials, such as graded aggregate.
  3. Maintenance: Since Charm is permanent, it eliminates costly maintenance and its associated materials, labour, and equipment.
 
Consider all the advantages: total installed cost, easy installation, long service life. Charm... the geotextile that engineers can specify with confidence.
     
 


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.

Charm installed between 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.

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.
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.
 


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.
 


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.
 
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.


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
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.





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
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.
 


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.
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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