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Bontec® Concrete Mattresses: a tailor made solution for specific erosion control applications.

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A concrete mattress is a two layer geotextile mattress filled with fine aggregate concrete after installation. The mattress acts as a shutter till the concrete is cured. The specific hydraulic characteristics of the fabric allow a slow evacuation from the concrete mixture water and limit the fine cement particles from getting through the fabric. Both result in a concrete which gives high strength, density and abrasion resistance whether constructed above or below the water. The two layers are connected in order to control the thickness of the mattress.

 

2 types of Concrete Mattresses are produced:

Permeable Concrete Mattress with filter points
Impermeable Concrete Mattress with connection threads

 

Concrete Mattress with filter points:

The mattress is woven together at regular intervals to form the so called filter points. These filter points acts as filters along water can drain off and release water pressure behind or under the mattress. The fine pore size of the filter points prevents the transport of fine soil particles.

Concrete Mattress with connection threads:

The mattress has internal connection threads. The specific length of the connections threads controls and provides a constant thickness after filling up with concrete. Due to the structure of the mattress, once hardened it forms an impermeable protection layer.
Advantages of Bontec® Concrete Mattresses:


Bontec® Concrete Mattresses offer a wide range of advantages:

° Can be installed on steep slopes without any difficulty
° Easily adapts to the curves and contours of the sub grade and as a result reduce the potential for under scour
° Easily adapts to complicated geometric shapes
° Perfect controlled thickness of mattress, no matter the slope
° The undulating surface of the filter point mattress, breaks the hydraulic energy, reduces the water velocity and as a result reduces wave run-up
° The slightly cobbled surface of the impermeable mattress gives low hydraulic resistance
° Industrial zippers ensure the fastening of adjacent panels in an efficient way
° Simple to install
° Economical alternative for the more conventional methods (riprap, gabions, concrete slabs,...)