Product Description
EVA plastic waterproof board is made from ethylene-vinyl
acetate copolymer (EVA) as the primary raw material, with the addition of
special additives and anti-aging agents. It is manufactured through processes
such as melting, extrusion, calendering, molding, and coiling into a sheet
material of a certain thickness. The appearance is generally semi-transparent
white.
Product Specification:
|
Thickness(mm)
|
1.2、1.5
|
|
Width(m)
|
1.0、2.0、3.0、4.0
|
|
Length(m/roll)
|
20、30 or can be customized
|
|
Square Meter(㎡/roll)
|
20、40、60、80
|
Product Performance:
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Performance Name
|
Technical indexes
|
Typical value
|
|
Tensile strength(23℃)
|
≥16MPa2
|
18.8MPa2
|
|
Low Temperature Flexibility
|
no crack -35℃
|
no crack -35℃
|
|
Tear strength
|
≥60 KN/m
|
122 KN/m
|
|
Impermeability 30Min
|
0.3MPa, no leakage
|
0.3MPa, no leakage
|
Product Features
1、 Optimal VA content for balanced high and
low-temperature performance.
2、 No plasticizers or recycled materials, ensuring
excellent product performance.
3、 Excellent physical and mechanical properties,
high strength, tear resistance, high elongation, and good resistance to stress
cracking.
4、 Resistant to corrosion from acids, alkalis,
salts, and other media in concrete or soil, and resistant to mold.
5、 High adaptability to construction environments,
good heat resistance, and low-temperature flexibility.
6、 Soft texture with good adhesion to the base
layer, making installation convenient.
7、 Good workability, strong weldability, with lap
joints welded using hot-melt welding. The welding parameters are adjustable,
making construction simple, fast, and the waterproof layer reliably sealed.
How to Use
Construction Process: Clean the base layer → Lay the cushion layer → Lay the
waterproof board → Handle lap joints → Deal with detailed node treatments →
Quality inspection and acceptance → Rebar tying → Secondary lining construction
Construction Points:
1、 Base Layer Cleaning: The base layer should
be flat, without sharp burrs, pipes, rebar, wire, etc. The corners of the base
layer should be rounded or arc-shaped. Before laying the waterproof board, the
base layer should be treated with cement mortar.
2、 Laying the Cushion Layer: The geotextile
cushion layer should be laid as flat and naturally as possible, without being
overly tight or forming large bumps at the corners. The cushion layer is fixed
to the base layer with cement nails or expansion bolts and round washers mach with
the waterproof board, arranged in a regular diamond pattern. The cushion layers
are connected using a lap joint method, and the lap joints can be point-bonded.
3、 Laying the Waterproof Board: The
waterproof board should be laid in the horizontal (circumferential) order of
the station. Use the hot-melt method to fix the waterproof board onto the round
washers, ensuring a secure bond to prevent the board from falling off during
concrete pouring.
4、 Lap Joint Treatment: The lap joints are
welded using a hot-melt double-seam welding method. The welding should be tight
and without burning or puncturing.
5、 Quality Inspection and Acceptance: After
welding, use an inflation method to test the welds. After laying the waterproof
board, conduct a comprehensive inspection of its surface, and promptly repair
any damaged areas. The patch should be cut with rounded corners, avoiding sharp
angles such as triangles or squares. In case of any leak detected, the leaking
welds should be fully manually rewelded.
Precautions:
1、 Operators must be trained before they can work
on the site.
2、 Construction should not be carried out in rain,
snow, or exposed to winds above level 5.
3、 The surface of the materials at the welding
site must be wiped clean, free from water, oil, or dirt.
4、 Strictly inspect the welding quality, ensuring
no missed or skipped welds.
5、 Protect the construction site during the
process, and prohibit personnel wearing spiked shoes from entering the area
where the waterproof board has been laid.
Product Application:
It mainly used for waterproofing projects in tunnels of
railways and subways; waterproofing of culverts for roads and railways; and
waterproofing, seepage prevention, and moisture-proof projects for various
municipal engineering projects, sewage treatment pools, and civil air defense
projects, among other underground construction projects.
