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Dayu GroupDayu Group was founded in 1998. It is a large-scale modern comprehensive enterprise integrating R & D, production, sales, construction and technical services. It is one of the leading enterprises in China's waterproof industry. Waterproof industry's top ten most influential brands, China's top 500 building materials enterprises, China's top 500 real estate enterprises preferred material suppliers.
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ProductsDayu Group has advanced production equipment and R & D resources, domestic and foreign joint R & D center and production base. With exquisite technology to achieve continuous upgrading and innovation of products, a number of products have been included in the national construction industry waterproof special scientific and technological achievements promotion project, obtained the first-class construction qualification of waterproof, thermal insulation and anti-corrosion integration, and provided high quality waterproof series products and construction services for many national major projects.
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ApplicationDayu Group and China Academy of Building Research have jointly established Dayu Technology Research and Development Center (provincial level) and Engineering Research and Development Center. Waterproof materials can be widely used in underground, roof, tunnel, high-speed rail, subway, bridge, municipal, environmental protection and other fields. In order to solve the problem of building waterproof leakage to provide a comprehensive and efficient solution, to achieve the same life of waterproof materials and buildings.
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CaseDayu Group has provided high quality waterproof products and construction services for major national projects such as the Olympic Village of the Beijing Olympic Games, Wukesong Gymnasium, Beijing Morgan Center, Shenyang Metro, Qingdao Metro and so on. at the same time, it has also reached strategic cooperation with many well-known real estate enterprises such as Longhu Real Estate, China Merchants Group and Greenland Group.
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Contact UsNational unified hotline: 400-990-6678
Email: lndy@lndy.top
Join us: +86-427-5918022
Started in 1998, the world's leading integrated provider of waterproof services
Since 1998，Leading Integrated Waterproof Provider In The World！
Product overview
Dayu®Pre-paved polyester tire self-adhesive waterproofing membrane is a self-adhesive waterproofing membrane composed of tire base, self-adhesive modified asphalt colloid and silicon-coated isolation membrane, which is specially used for underground waterproofing engineering using pre-paved anti-adhesive method.
l fetal baseHigh quality filament polyester felt.
l GlialThe SBS modifier is used to modify the petroleum asphalt to improve its high and low temperature resistance, fatigue resistance and bonding performance, and to improve the self-adhesive performance of modified asphalt, especially the bonding performance under the wet paving process.
l Surface material: The upper and lower surfaces are coated with silicon isolation film.
Product Features
l High tensile strength, strong tear resistance, excellent mechanical properties, strong damage resistance, and can directly bind steel bars without a protective layer.
l The hydrophilic additive is added to the colloid, which can react with the active ingredients of the structural concrete poured on its surface to form a very strong molecular bond, realizing the structure of rigid-flexible, anti-sticky and non-channeling with the structural concrete.
l The glue has strong adhesive ability, self-healing function, and excellent water tightness of the nail rod.
l Low temperature flexibility, long durability, long waterproof ability.
l The basic requirements are low, and the waterproof effect is easy to guarantee.
l Cold construction (no fire), self-paste, construction efficient, safe and environmentally friendly.
Specification classification
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Bonding surface |
Double-sided bonding (D) |
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Thickness |
4.0mm |
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Width |
1000mm |
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Length |
10m |
Scope of application
l Applicable to all kinds of industrial and civil buildings underground floor, side wall waterproof engineering.
l It is especially suitable for the basement exterior wall waterproofing project with tight and tight working space on the facade.
Construction process
l Basic requirements: solid, dry, no sediment, laitance, no empty drum, loose, sand and other phenomena.
l Interface treatment: uniform spray (roll) coating matching base treatment agent, improve the coil and the adhesion of the base. When the base surface condition is not good, can be in the local (such as yin and yang angle parts) for interface treatment.
l Trial laying of coiled material: lay the coiled material flat on the base surface, align the elastic line or the overlapping edge of adjacent coiled material, adjust the overlapping width, and rewind after standing for a period of time to release the stress.
l Cold adhesive paving: push forward to roll the paving coil, tear off the isolation bottom film, compact and exhaust to make the coil and the base closely bond.
l Body lapping: tear off the independent lapping film and roll the lapping edge to make the asphalt adhesive layer body bond tightly.
performance index
Products in accordance with the national standard "pre-paved waterproof membrane" GB/T23457-2017 manufacturing.
The performance index meets the requirements of PY coil in the standard.
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Project |
Indicators |
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Soluble content |
≥ 2900G/㎡ |
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Pull force |
≥ 800 n/ 50 mm |
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Elongation at maximum tension |
≥ 40% |
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nail bar tear strength |
≥ 200N |
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Puncture resistance |
≥ 550N |
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Impact resistance |
0.5kg · m No leakage |
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static load resistance |
20 kg without leakage |
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Heat resistance |
70 ℃,2h without slip, flow and dripping |
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Low temperature flexibility |
No crack at -20 ℃ |
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Water channeling resistance (hydraulic gradient) |
0.8MPa/35mm, no water channeling for 4h |
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impervious to water |
0.3MPa, impervious to water for 120min |
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