Fascine mattress / crib
Fascine mattress are made up of wedges. These are bundles of twisted willow wood, which are tied into mats with biodegradable lashing rope. They have been used for over 100 years to protect soils and banks against erosion by water. In road construction they prevent subsidence. Fascine mattress can also be made with plastic cloth: geotextile or bentonite.
Van Aalsburg BV has knowledge and experience for the traditional manufacture of all types of constructions: Fascine mattress for bottom protection and crib for bank protection . "
Different types of fascine mattresses
Fascine mattress (classic)
A classic fascine mattress is a mat made exclusively from bundles of willow branches (known as faggots). Without the use of synthetic fabrics and therefore very sustainable.
Fascine mattress with bentonite
Bentonite is a type of sodium clay containing particles that are so small they can stem the water flow in rivers and streams.
Fascine mattress with geotextile
Fascine mattresses with geotextile often contain less faggots than classic fascine mattresses. They are indestructible.
Classic fascine mattresses are often big and enormously heavy. That is why they are made on pipes, which enables them to slide smoothly and undamaged into the water. A tugboat or crane ship can move the fascine mattress to the desired location with tow lines.
First of all, a framework of faggots is constructed for the first layer, and then a second layer at right angles to the first. Each intersection is secured with lashing rope, which also forms the basis for further tying the brushwood to the fascine mattress. The lashing rope contains sisal-polypropylene which tightens when wet.
Sustainability and environmental friendliness
Next, brushwood bundles are evenly distributed between the top layer of faggots to a thickness of 10 to 15 cm. A second layer of brushwood is placed on top of these, at right angles to the first layer. The customer determines the thickness of the faggots and the layer of brushwood. The customer could be: Rijkswaterstaat (Directorate-General for Public Works and Water Management), a municipality or a contractor.