Geomembrane RGC-MB

Polymeric geomembranes in rolls, type “RGK-MB”, are making by extrusion method based on high density polyethylene (HDPE) or linear low density polyethylene (LLDPE). This material is intended for waterproofing works of varying complexity, for protection against corrosion and for waterproofing of concrete constructions, the barrier layers in embankments. Specific conditions of use the materials can be available with smooth surface or textured on one or both sides, as well as with geotextiles combined and made of polypropylene or polyester fibers.

Advantages of the material:

- Water-tightness;
- Service temperature of geomembranes: from -70°C to +70°C;
- Chemical stability pH = 0,5÷14;
- Service durability exceeds 80 years;
- Non-toxic material.

When making the material the carbon black is applied for ultraviolet radiation protection. Its contents should make 2, 0% by weight.

Applications of geomembranes:

- Solid waste landfills;
- Especially hazardous industrial waste and slag waste storages;
- Potable water tanks;
- Waste water tanks, irrigation and fire reservoirs;
- Petroleum storage reservoirs insulation;
- Architectural and landscape impoundments;
- Concrete tanks protection;
- Foundations seal and tanking;
- Waterproofing in dams, dikes and tunnels structures.

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Table 1 – Physical and mechanical properties of smooth geomembranes type “RGK-MB”

Tested property	HDPE membranes , thickness, mm					LLDPE membranes , thickness, mm
	1,0	1,5	2,0	2,5	3,0	1,0	1,5	2,0	2,5	3,0
Density of membrane, g/cm³	≥0,94					≥0,92
Tensile strength, MPa, min
at +20°C
- in-line longitudinal direction or MD	27					27
- cross-line transverse direction or TD	27					27
at +50°C
- in-line longitudinal direction or MD	26					26
- cross-line transverse direction or TD	26					26
at -20°C
- in-line longitudinal direction or MD	27					27
- cross-line transverse direction or TD	27					27
Relative breaking elongation, %, min
at +20°C
- in-line longitudinal direction or MD	700					800
- cross-line transverse direction or TD	700					800
at +50°C
- in-line longitudinal direction or MD	750					900
- cross-line transverse direction or TD	750					900
at -20°C
- in-line longitudinal direction or MD	650					750
- cross-line transverse direction or TD	650					750
Yielding point at yield at +20°C, MPa, min
- in-line longitudinal direction or MD	15,0					-
- cross-line transverse direction or TD	15,0					-
Relative elongation to yielding point, %, min	12,0					-
Secant modulus under 2% deformation, H/mm	-	-	-	-	-	420	630	840	1050	1260
Rupture resistance, H, min	125	190	250	315	375	100	150	200	250	300
Puncture resistance, H, min	320	480	640	800	960	250	370	500	620	750
Bursting strength, H/mm³	18					16
Weakening after 30 freeze-thaws, %, from reference value, max	10					10
Aged weakening after 90 days at 85°C, from reference value, max	45					50
UV post- irradiation weakening, 400 hours, %, from reference value, max	15					20
5 mm radius of curvature at -40°C	There should be no cracking and any other visible defects on surface of the sample					There should be no cracking and any other visible defects on surface of the sample
Dimensional measurements when heated at (70±2) °C within 6 hours, %, max	2,0					2,0
Resistance to water within 3 hours under hydraulic pressure of 0,3 (3,0) MPa (kgf/cm²G)	No water					No water
Water absorption by mass within 30 days, %, max	0,002					0,002
Vapour permeability, mg/m hour	No vapor transmission					No vapor transmission
Chemical stability after steeping in solution within 1000 hours, %, max
- at pH 0,5:
- weight metering	0,05					0,05
- dimensional measurement	0,5					0,5
- at pH 13:
- weight metering	0,05					0,05
- dimensional measurement	1,5					1,5
Degree of flammability:
- highly combustible	After flame time exceeds 300 seconds					After flame time exceeds 300 seconds
- mean rate of combustibility	After flame time is not more than 30 seconds					After flame time is not more than 30 seconds

Table 2 – Physical and mechanical properties of embossed geomembranes type “RGK-MB”

Tested property	HDPE membranes (high density poly ethylene-based), thickness, mm					LLDPE membranes (linear low density polyethylene-based), thickness, mm
	1,0	1,5	2,0	2,5	3,0	1,0	1,5	2,0	2,5	3,0
Density, g/cm³	≥0,94					≥0,92
Tensile strength, MPa, min
at +20°C
- in-line longitudinal direction or MD	(10,5)					11
- cross-line transverse direction or TD	(10,5)					11
at +50°C
- in-line longitudinal direction or MD	9					10
- cross-line transverse direction or TD	9					10
at -20°C
- in-line longitudinal direction or MD	(10,5)					11
- cross-line transverse direction or TD	(10,5)					11
Breaking elongation, %, min
at +20°C
- in-line longitudinal direction or MD	100					250
- cross-line transverse direction or TD	100					250
at +50°C
- in-line longitudinal direction or MD	120					300
- cross-line transverse direction or TD	120					300
at -20°C
- in-line longitudinal direction or MD	90					200
- cross-line transverse direction or TD	90					200
Tensile strength at yield at +20°C, MPa, min
- in-line longitudinal direction or MD	15,0					-
- cross-line transverse direction or TD	15,0					-
Tensile strain at yield, %, min	12,0					-
Secant modulus under 2% deformation, H/mm	-	-	-	-	-	420	630	840	1050	1260
Tear resistance, H, min	125	190	250	315	375	100	150	200	250	300
Weakening after 30 freeze-thaws, %, from reference value, max	10					10
Aged weakening after 90 days at 85°C, from reference value, max	45					50
UV post- irradiation weakening, 400 hours, %, from reference value, max	15					20
5 mm radius of curvature at -40°C	There should be no cracking and any other visible defects on surface of the sample					There should be no cracking and any other visible defects on surface of the sample
Resistance to water within 3 hours under hydraulic pressure of 0,3 (3,0) MPa (kgf/cm²G)	No water					No water
Water absorption by mass within 30 days, %, max	0,002					0,002
Vapor transmission rate, mg/m hour	No vapor transmission					No vapor transmission
Chemical stability after steeping in solution within 1000 hours, %, max
- at pH 0,5:
- weight metering	0,05					0,05
- dimensional measurement	0,5					0,5
- at pH 13:
- weight metering	0,05					0,05
- dimensional measurement	1,5					1,5
Degree of flammability:
- highly combustible	After flame time exceeds 300 seconds					After flame time exceeds 300 seconds
- mean rate of combustibility	After flame time is not more than 30 seconds					After flame time is not more than 30 seconds

Table 3 – Characteristics for needle-punched fabric made from polypropylene materials

Characteristic name	PP-150	PP-200	PP-250	PP-300	PP-350	PP-400	PP-450	PP-500	PP-550	PP-600
Surface weight, g/m²+5/- 10%	150	200	250	300	350	400	450	500	550	600
Thickness under pressure of 2,0 kPa, mm, min	1,0	1,2	1,4	1,6	1,8	2,0	2,2	2,5	2,8	3,0
Breaking strength, kN/m, min:
- along	5,6	8,2	10,2	12,2	14,2	16,2	18,2	19,6	21,0	22,8
- across	3,6	6,6	8,3	9,9	11,6	13,2	15,0	16,6	18,0	19,2
Relative breaking elongation, %, max	100
Filtration coefficient under pressure of 2,0 kPa, m/day, min	70	65	60	55	55	45	45	40	40	40
Hole content O_{90 ,}µm, min	100			80			60
Impact puncture strength, kN, min	1,0			1,5
Cone breakdown, mm, max	30			20
Bruise resistance when laying, %, min	80
UV resistance, %, min	80
Aggressive influences resistance, %, min	80
Resistance to microorganisms, %, min	90
Cold-resistance coefficient, %, min	80

Table 4 – Characteristics for needle-punched fabric made from polyether materials

Characteristic name	PL-100	PL-130	PL-160	PL-200	PL-250	PL-300	PL-330	PL-350	PL-360
Surface weight, g/m²+/- 10%	100	130	160	200	250	300	330	350	360
Thickness under pressure of 2,0 kPa, mm, +/- 15%	1,8	1,9	2,0	2,5	2,7	3,0	3,2	3,3	3,5
Tensile strength, kN/m, min:
- along	2,8	3,4	4,4	6,0	6,6	8,8	11,0	11,8	12,0
across	2,8	3,4	4,4	6,0	6,6	8,8	11,0	11,8	12,0
Tensile elongation, %, max	100
Filtration coefficient under pressure of 2,0 kPa, m/day, min	65	65	65	60	60	55	55	50	50
Hole content O_{90 ,}µm, min	100					80
Impact puncture strength, kN, min	1,0					1,5
Cone breakdown, mm, max	30					20
Bruise resistance when laying, %, min	80
UV resistance, %, min	80
Aggressive influences resistance, %, min	80
Resistance to microorganisms, %, min	90
Cold-resistance coefficient, %, min	80

Table 5 - Basic geometrics of geomembranes type “RGB-MB”

Geomembrane thickness, mm	Roll length, m	Roll width, m
1,0 ±10%	200±0,5	5,0±1,0%
1,5 ±10%	100±0,5
2,0 ±10%	80±0,5
2,5 ±10%	80±0,5
3,0 ±10%	80±0,5
*Preparation of geomembranes with any other dimensions should be allowed by agreement with the customer

Table 6 - Basic geometrics of geomembranes type “RGB-MB” with rolled down geotextiles with surface weight 150-250 g/m²*

Geomembrane thickness, mm	Roll length, m	Roll width, m	Geotextile fabric width, m
1,0 ±10%	100±0,5	5,0±1,0%	4,6±1,0%
1,5 ±10%	100±0,5
2,0 ±10%	80±0,5
2,5 ±10%	80±0,5
3,0 ±10%	70±0,5
*Preparation of geomembranes with any other dimensions should be allowed by agreement with the customer

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