Author: Besser, Jörn
Company: HP

Specification text 
Bentofix^® X5F BFG 5300

Pos.: ……. Amount [m²]: .…..… Unit price/m²: ………. Total price/m²: ………………

Supply of a geosynthetic clay liner (GCL), Bentofix® X5F BFG 5300, from Naue GmbH & Co. KG or equivalent and installation on the prepared subgrade according to the manufacturer's installation guidelines. Payment is done in accordance to total covered GCL area. Overlap losses and waste due to cutting of GCL must be taken into account.

Bentofix^® X5F BFG 5300 is a Geosynthetic Clay Liner (GCL) of a continuous layer of a high swelling sodium bentonite powder, sandwiched between a needle-punched polypropylene (PP) geotextile as a cover layer and a slit-film PP woven geotextile as the carrier layer. The components are needle-punched uniformly together across the entire GCL creating a shear stress-transferring composite GCL. Additional 800g/m² bentonite with the same quality as the core bentonite is impregnated into the entire cover nonwoven geotextile during the manufacturing process to facilitate self-sealing overlaps. An embossed structured polyethylene (PE) layer is applied over the entire surface of the slit-film woven carrier component. An overlap guide-line delineating the overlap zone is imprinted with non-toxic ink 30cm from the woven edges of the GCL panel to ensure the accuracy of the seam. Unless otherwise required, overlaps and connections must be made with the one-sided, self-adhesive Bentofix® X Tape.

The following equivalency average parameters (if not indicated otherwise) must be fulfilled:

Cover layer
Geotextile:								needle-punched nonwoven
Type:									Polypropylene (PP)
Mass per unit area (ISO 9864):					≥ 200g/m²
Filled with sodium bentonite powder (entirely)			800 g/m²

Bentonite layer (total, including nonwoven filling)
Bentonite type:							Sodium bentonite powder 
Bentonite grain size:						≤ 0.2mm
Mass per unit area (ISO 14196):				
(at ≤ 15% moisture content)				4,970g/m^2
Swell index (ASTM D5890):					≥ 24ml/2g
Fluid loss (ASTM D5891):						≤ 18ml/2g
Moisture content (ISO 11465 (5h, 105°C)):			≤ 15%

Carrier layer
Geotextile:								Slit-film woven
Type:									Polypropylene (PP)
Mass per unit area (EN ISO 9864):				≥ 100g/m^2

Structured polyethylene coating (on carrier layer)
Mass per unit area (ISO 9864):					≥ 500 g/m²
Type:									Polyethylene (PE)

Geosynthetic clay liner
Mass per unit area (EN 14196): 		
(at ≤ 15% moisture content) 				5,850g/m^2
Overlapping areas:							self-sealing
Thickness, dry (EN ISO 9863-1):					6.3mm
Tensile strength, max., md/cmd (EN ISO 10319):		22 / 22kN/m
Elongation at break, md/cmd (EN ISO 10319):			10 / 6 %
Peel strength (ASTM D6496)
Maximum peak value:					≥ 60N/10 cm
Average value: 						≥ 360N/m

Internal shear strength, 24h hydration under confining stress
(Shear apparatus according to EN ISO 12957-1, 
≥ 900cm² shear surface)
Confining stress = 20kPa, internal shear stress:			≥ 35kPa
Nod heights of the embossed structured surface:		80 % ≥ 0.4 mm

Static puncture test (EN ISO 12236):				3,300N

Permeability (k_10) (EN 16416 / ASTM D5887):			≤ 10^-14 m/s
Permittivity (ψ_10) (EN 16416 / ASTM D 5887):			1.5 ∙ 10^-9 1/s
Index flux (q_10) (EN 16416 / ASTM D5887):			2.8 ∙ 10^-9 (m^3/m^2)/s
	
Needle detector tested (continuously over entire width):	Yes
Needle-punched fibres fully integrated in PE coating:		Yes

Roll dimensions:
Width x length							4.85m x 40m

The following additional documents must be provided with the offer:
•	Manufacture quality control and assurance management system following DIN 18200
•	Quality management system according to EN ISO 9001
•	Current CE-certification
•	Product group EPD (Environmental Product Declaration)

Supplier of Bentofix^® X5F BFG 5300
Naue Group
www.naue.com 

md – machine direction
cmd – cross-machine direction						Status: 01.02.2022