BNBM Yuwang waterproof coating series products can be divided into polymer waterproof coating, polymer modified asphalt waterproof coating and polymer cement waterproof coating.

WATERPROOF COATING SERIES

Polyurethane Waterproof Coating For High Speed Rail ( Tensile Strength 6.0Mpa)

Waterproof coating ranges

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The material cures into a film by reacting of components A and B. component A is a prepolymer containing isocyanate group obtained by condensation polymerization of polyether and polyisocyanate. Part B is a paste formed by mixing of crosslinking agents, promoting agent, flexibilizer, thickener, fungicide, fillers, and pigments. When using, mix components A and B according to a certain proportion; after mixing evenly, coat on the construction base; after several hours of curing reaction, it will form a waterproofing film of elastic resilience and durability. The coating has excellent heat-resisting adhesion and shear resistance, and the elastic high-strength coating film formed after the construction of road and bridge can withstand long-term load movement of road and bridge, prevent structural damage to the copper bar, the corrosion and the concrete carbonization caused by seepage, and greatly extend the service life of road and bridge.

PRODUCT

INTRODUCTION

FEATURES

PRODUCT

Strong shear resistance, high and low temperature bearing performance；under the condition of -50-160℃, the waterproof layer can still resist the movement load and horizontal shear.

①

The film has good elasticity, its elongation is more than 450%, and it can resist structural deformation completely.

②

High strength, strong adhesion with the substrate.

③

Acid and alkali resistance, corrosion resistance, strong permeability, extend the service life of the bridge.

④

The material could be cold applied, easy in construction; both spraying method and scraping method are available.

⑤

1.Weigh components A and B accurately(mass ratio) and use the electric blender mixing to make components A and B thoroughly incorporated, the mixed material better be used up within 20 minutes.
2.Construction temperature should be 5~35℃; it is forbidden to constructing on rainy and snowy weather.
3.Within 4 hours after the spraying of coating or 12 hours after the brushing of coating, it is necessary to protect against frost and rain.
4.After the waterproof layer is accepted, the construction of protective isolation layer can be carried out according to relevant specifications or design requirements.
5.Recommended consumption: with thickness of 1.0mm , the amount of coating is 1.4~1.6kg/㎡.

Notices

●Requirements of substrate: before construction, remove the floating dust on the surface; there should be no previous water or oil fouling or other contamination.
● The proportion of ingredients: preparing components A and B according to manufacturer instructions. Weighting accurately(mass ratio) and mixing evenly to make components A and B thoroughly incorporated, the mixed material better be used up within 20 minutes.
● Equipment requirements: when the spraying method is used for construction, the equipment should have automatic metering mixing and heating functions, and the discharge temperature is 60~80℃.
● Manual scraping: when using manual brushing, coating, components A and B should be fully stirred evenly with special equipment, using scraping plate or rolling brush to evenly scrape the coating on the surface of the substrate, the thickness of the coating film should reach 2.0mm. The coating should be carried out in 2~3 times to prevent bubbles from being stored in the coating film.

Spraying method, brushing method

METHOD

CONSTRUCTION

≥3.5

peel strength with concrete/（N/mm）

≥35.0

tearing strength/（N/mm）

≥0.40   ≥0.60   

涂料与水泥混凝土粘结强度/M Pa

≥2.5

bonding strength of coating and cement concrete/MPa

≥0.60

bonding strength with wet substrate/MPa

≥98

solid content/%

No cracking or peeling

alkali resistance saturation solution，500h

≥-4.0，≤1.0

heating elongation/%

0.4MPa，2h,impermeable

impermeability

≤24

hard drying time/h

≤-35℃，No cracking

low temperature flexibility/℃

≥450

elongation at break/%

≥6.0

tensile strength/MPa

Physical Index

TB/T 2965-2018《Waterproof Layer of Railway and Concrete Bridge》

STANDARD

EXECUTIVE

≤4

touch drying time/h

It is suitable for anti-corrosive, impervious and waterproof projects such as Bridges and high-speed railways. Applicable to various military projects, nuclear power plants, ship docks and other special anti-corrosion, moisture-proof, waterproof projects.

Application Areas