Self-Adhesive Anti-Drainage Board

Self-adhesive drainage prevention board is a drainage prevention board with special convex hull structure made by stamping polyethylene (PE) plastic substrate. The drainage prevention board is composed of drainage prevention board body, self-adhesive cloth and adhesive tape, and the lap of drainage prevention board is made by hot-melt welding or pressure-sensitive cold bonding.

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Product Description

The Principle Of Anti-Drainage

The projecting shell of the drainage prevention board is installed facing the initial support, and the concrete support of the second liner lining is installed with the drainage prevention board as the template, and the concrete lining is filled into the concave shell so that the drainage prevention board is integrated with the molded concrete to form a point contact with the hemp surface, thus forming a three-dimensional drainage prevention system with the drainage prevention board as the interface and a stable and permeable drainage space between the initial support and the drainage prevention board with dual functions of drainage and waterproofing. Using the longitudinal natural slope of the tunnel, the longitudinal drainage blind pipes on both sides of the foot of the arch are gathered to the central gutter, so as to smoothly exclude the fissure water and leakage water behind the lining and achieve the purpose of lasting waterproof protection.

Product Features

1, Integration of structure and installation, combination of prevention and drainage, comprehensive design from line drainage to surface drainage, better drainage effect

2, The body is compounded with adhesive tape and comes with a self-adhesive cloth that matches the adhesive tape, forming a new structure of self-adhesive drainage prevention board

3, The convex hull adopts a plum-shaped arrangement, and the drainage board has improved pressure resistance

4, Good chemical stability, good corrosion resistance to acid and alkali and salt aqueous solutions

5. High tensile strength and excellent puncture resistance.

6. weather-resistant, aging-resistant, stable product performance and long service life.

The comparison of ordinary anti-drainage board and self-adhesive anti-drainage board

Common drainage board

Advantages of self-adhesive drainage board

Ordinary drainage board only has drainage, and laying and hanging fixed easy to cause breakage, waterproof effect is difficult to ensure; laying and hanging method is inefficient.

Based on the comprehensive design concept of integration of structure and installation, combination of drainage prevention and drainage, drainage from line to surface; bonding adhesive tape on the body of drainage prevention board and wearing self-adhesive cloth matching the adhesive tape form a new structure of self-adhesive drainage prevention board, which is simple to lay and hang and highly efficient, and the lap edges are welded by hot welding, so the drainage prevention effect can be guaranteed.

Performance Indicators

Table 1 Physical and mechanical properties of the drainage prevention board body

Serial number	Projects			Requirements
				Thickness 1.0mm	Thickness 1.2mm
1	Compression resistance	Compressive strength kPa		≥200	≥300
		Appearance of shell height after 50% compression		No breakage	No breakage
2	Tensile strength MPa	Vertical		≥13	≥13
		Horizontal		≥13	≥13
3	Elongation at break	Vertical		≥700%	≥700%
		Horizontal		≥700%	≥700%
4	Impermeability (0.3MPa,24h)			Impervious to water	Impervious to water
5	Tear strength kN/m	Vertical		≥150	≥150
		Horizontal		≥120	≥120
6	Puncture strength N	Flat parts		≥300	≥350
		Housing part		≥500	≥600
7	Low temperature bendability (-35℃)	Vertical		Bend without cracks	Bend without cracks
		Horizontal		Bend without cracks	Bend without cracks
8	Heating God shrinkage amount mm	Vertical	Extension	≤2	≤2
			Systolic	≤6	≤6
		Horizontal	Extension	≤2	≤2
			Systolic	≤6	≤6
9	Cross-sectional drainage cross-sectional area cm2			≥40	≥40
10	Artificial climate aging	Tensile strength retention rate	Vertical	≥80%	≥80%
			Horizontal	≥80%	≥80%
		Elongation at break retention rate	Vertical	≥70%	≥70%
			Horizontal	≥70%	≥70%
11	Hot air aging	Tensile strength retention rate	Vertical	≥80%	≥80%
			Horizontal	≥80%	≥80%
		Elongation at break retention rate	Vertical	≥70%	≥70%
			Horizontal	≥70%	≥70%
12	Alkali resistance (Saturated Ca(OH)2 solution, 23°C × 168h)	Tensile strength retention rate	Vertical	≥80%	≥80%
			Horizontal	≥80%	≥80%
		Elongation at break retention rate	Vertical	≥80%	≥80%
			Horizontal	≥80%	≥80%

Table 2 Physical and mechanical properties of self-adhesive fabric for drainage prevention board

Projects		Indicators
Nominal fracture strength		15	20
1	Longitudinal and transverse fracture strength KN/mm	≥15.0	≥20.0
2	Elongation corresponding to standard strength in longitudinal and transverse directions	60%~120%
3	CBR top breaking power KN	≥1.7	≥2.5
4	Longitudinal and transverse tearing power KN	≥0.32	≥0.40
5	Equivalent bore diameter O90 (O95 ) mm	0.07~0.20
6	Vertical permeability coefficient cm/s	K×(10-1 ~10-3 ), where K=1.0~9.9
7	Mass per unit area g/m2	≥400
8	Acid and alkaline resistance (strong retention rate)	≥80%

Table 3 Self-adhesive fabric and adhesive tape bonding performance of anti-drainage board

Serial number	Projects		Requirements
1	Shear strength N/cm2		≥7.5
2	Bonding performance	Load holding time d	7d no change
		Bonding strength N/cm2	≥1.5
		Type of interface damage	Type I damage

Table 4 Anti-drainage board self-adhesive physical and mechanical properties and harmful substances limit

Serial number	Projects		Requirements
1	Adhesion min		60min no change
2	Low temperature bendability		-25℃, no cracks
3	Peel strength (Homogeneous sheet with homogeneous sheet) N/mm	Standard Conditions	≥3.0
		Hot air aging (80℃×168h)	≥2.0
		Water immersion (23℃×168h)	≥2.0
		Alkali resistance (saturated Ca(OH)2 solution, 23°C x 168h)	≥2.0
4	Shear strength (Homogeneous sheet with homogeneous sheet) N/mm	Standard Conditions	≥10.0
		Hot air aging (80℃×168h)	≥8.0
		Water immersion (23℃×168h)	≥8.0
		Alkali resistance (saturated Ca(OH)2 solution, 23°C x 168h)	≥8.0
5	Shear strength (Shaped piece and dissimilar piece) N/mm	Standard Conditions	≥8.0
6	Heat resistance		70 ℃ heating 2h no displacement, flow, dripping
7	Content of volatile hazardous substances	Benzene mg/kg	≤200
		Toluene + ethylbenzene + xylene g/kg	≤1.0
		Phenol mg/kg	≤200
		Anthracene mg/kg	≤10
		Naphthalene mg/kg	≤200
		Free formaldehyde mg/kg	≤500
		Dichloromethane g/kg	≤50
		1,2-dichloroethane+1,1,2-trichloroethane+trichloroethylene g/kg	≤5.0
		Volatile organic compounds (VOC) g/L	≤50
8	Soluble heavy metal content	Lead mg/kg	≤90
		Cadmium mg/kg	≤75
		Chromium mg/kg	≤60
		Mercury mg/kg	≤60

Application scope

Railroad tunnel anti-drainage system; subway and highway tunnel anti-drainage system; underground waterproofing system, building roof waterproofing system.

Products can be customized in width as required.