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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®The modified asphalt waterproofing membrane for road and bridge is a hot-melt waterproofing membrane composed of tire base, plastic body modified asphalt gum and surface material.
l fetal baseHigh quality filament polyester felt.
l GlialSBS (styrene-butadiene-styrene) or APP (random polypropylene) as a modifier to modify the petroleum asphalt, prepared into a dip coating gum, evenly coated on both sides of the tire base.
l Surface material: Polyethylene film, fine sand.
Product Features
l High tensile strength, strong tear resistance, good dimensional stability, excellent mechanical properties, and strong resistance to breakage.
l Excellent high temperature resistance, high temperature pavement environment does not flow, good durability.
l Excellent fatigue resistance, long-term withstand road vibration without strain.
l Mature hot melt method construction process, molten asphalt body lap, reliable bonding, lap firmly, suitable for all seasons.
Specification classification
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Upper surface material |
S (fine sand) |
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Lower surface material |
PE (polyethylene film)/S (fine sand) |
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Thickness |
3.5mm/4.5mm |
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Width |
1000mm |
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Length |
7.5m/10m/15m/20m |
Scope of application
l Applicable to road, bridge waterproof engineering.
l Type I coil modified by SBS or APP is used for paving base surface of paving asphalt concrete; Type II coil modified by APP is used for paving base surface of pouring asphalt concrete mixture.
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.
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 Hot melt paving: bake the lower surface and base surface of the coil with a flame, push the roll-paving coil forward in time after the colloid is melted, and compact and exhaust while it is hot to tightly bond the coil with the base layer.
l Ontology lap joint: paving and pasting synchronous rolling lap joint edge until 5~8mm molten asphalt is extruded (regarded as reliable lap joint).
performance index
Products in accordance with the building materials standard "road and bridge with modified asphalt waterproofing membrane" JC/T974-2005 manufacturing.
The performance index meets the requirements of class R coil in the standard.
List of basic physical performance indicators of coiled materials:
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Project |
Indicator (Type R) |
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Thickness of asphalt alteration layer on lower surface of coil |
≥ 1.5mm(3.5mm coil) ≥ 2.0mm(4.5mm coil) |
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Soluble content |
≥ 2400g/㎡(3.5mm coil) ≥ 3100g/㎡(4.5mm coil) |
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Heat resistance (can be higher) |
No sliding, flowing and dripping at 115 ℃ (SBS type) No sliding, flowing and dripping at 130 ℃ (APP Class I) No sliding, flowing and dripping at 160 ℃ (APP Class II) |
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Low temperature flexibility (can be lower) |
No crack at -25 ℃ (SBS type) No crack at -15 ℃ (APP Class I) No crack at -10 ℃ (APP Class Ⅱ) |
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Pull force |
≥ 800N/50mm |
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Elongation at maximum tension |
≥40% |
Coil application performance
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Project |
Indicator (Type R) |
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50 ℃ shear strength |
≥ 0.12MPa |
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Bonding strength at 50 ℃, |
≥ 0.050MPa |
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Impermeability after hot rolling |
0.1MPa, impervious to water for 30min |
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Joint deformation capacity |
No damage in 10000 cycles |
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