PROTEX Concrete Mattress Solutions
Filter Point Concrete Linings with filtration points (drains) provide erosion resistant, permeable concrete linings for ditches, channels, canals, streams, rivers, ponds, lakes, reservoirs, marinas, and protected port and harbor areas. Filter Point Concrete Linings have a cobbled surface and a relatively high coefficient of hydraulic friction in order to achieve lower flow velocities and to reduce wave run-up. The filtration points provide for the relief of hydrostatic uplift pressures, increasing the system’s stability.
Filter Point Concrete Linings were the first type of fabric formed concrete system developed. In 1965, a Dutch patent was issued for “fabric-formed slope paving.” The form suggested by this patent was later refined to create the first “filter point” lining.
Filter Band linings are similar to Filter Point, providing an effective and highly permeable concrete lining that resists erosive forces. Filter Band differs from Filter Point in that the form creates interconnected, tubular concrete elements that are separated by large, interwoven filter bands. The filter bands provide for greater reduction of uplift pressures than Filter Point linings. Also, the biaxial alignment of the tubular elements creates two directionally-determined coefficients of hydraulic friction. As a result, Filter Band achieves greater reduction of flow velocity or wave energy than Filter Point.
Filter Band concrete linings are specified in situations similar to those for which Filter Point might be used, but which also require greater relief of uplift pressures, higher reduction of flow velocities, or greater reduction of wave run up.
Enviromat Linings are installed to provide protection against periodic high flows. After installation, vegetation can be planted within the open structure of the lining.
Enviromat Linings are used in drainage ditches and on the upper slopes of channels, canals, lakes, reservoirs, rivers, and other water courses as well as for embankments subject to heavy run-off. Enviromat Linings are comprised of concrete-filled elements and unfilled areas that allow for the establishment of vegetation. Once the concrete sets, the unfilled and interwoven areas are opened by cutting the fabric and are planted or are filled with topsoil and seeded. Within a growing season a vegetated cover will normally extend over the lining, resulting in an erosion control system with the hydraulic, ecological and aesthetic features desired.
EL Linings have a greater open area than EB, so a vegetated cover will be established more rapidly. EB Linings can articulate and are more tolerant of uneven settlement after installation.
Uniform Section Linings are similar to traditional concrete slope paving. They create a solid, high quality concrete lining with a relatively low hydraulic resistance and uniform cross section. These linings are used to reduce the infiltration or exfiltration of aggressive waste and chemical fluids into or out of open channels and basins. They are also used to reduce exfiltration in arid regions where open channels and basins require watertight linings.
Uniform Section Linings are resistant to leachate and most chemicals. They protect geosynthetic liners from mechanical damage, exposure to UV light, and freeze-thaw cycles. These self-supporting, high strength linings permit construction on steep side slopes and replace the conventional use of clay or sand as liner protection. Concrete filling of the forms can be performed with a minimum of traffic on the liner, and the tensile strength and abrasion resistance of the fabric protect the liner from the pumped concrete.
Articulating Block Mats form cable-reinforced concrete block mattresses that resist erosive forces. They are often constructed where a revetment is exposed to frontal attack by wave action. AB Mats are typically used to protect coastlines, canals, rivers, lakes, reservoirs, underwater pipelines, bridge piers, and other marine structures from propeller wash, ship wakes, wind waves, currents, and high velocity flows. They are also used in environmental construction for landfill caps, down chutes, and collector channels.
The AB fabric form consists of a series of compartments linked by an interwoven perimeter. Grout ducts interconnect the compartments, and high strength revetment cables are installed between and through the compartments and grout ducts. Once filled, the AB Mats becomes a mattress of pillow-shaped, rectangular concrete blocks. The interwoven perimeters between the blocks serve as hinges to permit articulation. The cables remain embedded in the concrete blocks to link the blocks together and facilitate articulation.
Hydrocast Armor Units are monolithic concrete structures which replace heavy rip rap and large precast concrete armor units, such as tetrapods. The rectangular fabric forms, when filled, assume a flattened cylindrical cross section and range in size from roughly 180 pounds to in excess of 70 tons per unit (80-64,000 kg). Available in custom sizes and shapes, the dimensions of the form control the concrete armor unit's length, width, height, and weight.
Armor Units have the mass and stability for the construction of gravity seawalls and revetments, groins, levees, dikes, dams, check dams, and other civil and marine structures subject to attack by waves or rapidly flowing water. Since they are filled in place, they adapt to variations in the subgrade and are ideal for preventing or repairing scour at bridge piers and abutments. Hydrocast installations do not require dewatering, a crucial advantage in emergency repair situations.