Our MacTube® was developed for coastal and marine engineering applications and is used in the construction of sea defences, dune reconstruction, breakwaters and groynes. Their size is varied depending on the needs of the project.
MacTubes® are made from a woven geotextile tube, made of high tenacity polypropylene fibres, with high strength seams and filled with the locally available slurried sand (or similar). The MacTube® is UV resistant, has a high mechanical resistance and high durability. The sand slurry is pumped into the MacTube® tube through filling ports. The water component of the slurry drains out through the walls of the tube, leaving the sand within.
They can also be used in the construction of river breakwaters within larger river works.
Our range of dewatering MacTubes® are tubular geotextile containers that are used to increase the efficiency of the dewatering of slurries. They enable the on-site treatment of a wide range of both natural and contaminated fluid sludges. Dewatering features MacTube® geosynthetic tubes which are filled in-situ with a pumped slurry; the fluid drains through the fabric walls, leaving the solid residues within the tube. Once the residue has dried it can be disposed of far more safely and cost effectively than wet, slurried material. The use of site-specific flocculants is common to accelerate the filtration process.
The dewatering and drying of sludge is a technology with low environmental impact and cost.
MacBag® is a bag made from woven geotextile, filled on site with sand or grout and used in the construction of groynes, perched beaches and offshore breakwaters. It can also be used for the basal protection of marine structures and also as a support for sub-marine pipelines.
Once installed MacBag® accepts the shape of the seabed, filling gaps between structures or to support pipelines. The “compliant” nature and size of the filled MacBag® also enables it to be successfully used in dune reconstruction or to provide rapid repairs after storm events.
MacBags® are composed of a bag made of a high tenacity polyester or poly-propylene woven geotextile that is filled prior to installation. The structure is resistant to UV, has a high tensile strength and long durability. It is produced in elements of different sizes depending on the project needs.