NWJ114 SBS-Modified Asphalt Waterproofing Membrane for Roads and Bridges

This product is a waterproofing membrane for roads and bridges manufactured using a polyester felt as the substrate, styrene-butadiene-styrene (SBS) thermoplastic elastomer-modified asphalt as the impregnation and coating material, and a separating layer on both sides.

Product Structure

Product Categories

Based on the installation method, waterproofing membranes are classified as hot-melt or hot-melt adhesive types. The top surface of the membrane is coated with fine sand.

Hot-melt waterproofing membranes are classified by their underside material into polyethylene film and fine sand.

The material used on the underside of waterproofing membranes applied with hot-melt adhesive consists of fine sand.

Specifications and Dimensions

Thickness: 2.5 mm, 3.5 mm (hot-melt adhesive type); 3.5 mm, 4.5 mm (hot-melt type);

Width: 1000 mm;

Area: 7.5 m², 10 m², 15 m².

Code Marker

R—Hot melt; J—Hot melt adhesive; S—Fine sand; PE—Polyethylene film.

Products are marked in the following order: application method, modifying material, model number, underside material, area, thickness, and this standard number. Hot-applied SBS-modified bitumen with fine sand, 10 m² area, 3.5 mm thickness, road and bridge waterproofing membrane

Labeled as: Road and Bridge Waterproofing Membrane R SBS S 10 m² 3.5 mm JC/T974-2005

Product Features

• Excellent resistance to high and low temperatures;
• High bond strength and excellent adhesion to the substrate, effectively preventing slippage between the waterproofing layer and the substrate;
• High shear strength, capable of withstanding dynamic loads on bridges;
• It offers excellent impermeability and water resistance, and can withstand dynamic water pressure;
• It offers excellent resistance to impact, tearing, fatigue, and aging, and can withstand the effects of high and low temperatures as well as dynamic loads on the bridge deck;
• The hot-melt method is easy to apply and produces reliable, durable seams.

Construction Methods

Hot-melt membranes are installed using the hot-melt method; adhesive-backed membranes are installed using the adhesive method.

• The substrate must be level, firm, dry, and free of dust, grease, and sharp edges.
• Apply additional treatment to the detailed joints and apply a primer.
• Unroll the membrane at the marked position, use a heat gun to heat the underside of the membrane and the substrate, then lay the membrane in place, pressing it down as you go to remove any air pockets and ensure a strong bond between the membrane and the substrate.
• When installing roll roofing using the hot-melt method, the asphalt strip at the lap joints should extend approximately 2 mm beyond the edge, be even and straight, and the lap joints and ends should be properly sealed.

Applications

Suitable for waterproofing and seepage control projects on highways, bridges, airport runways, and other similar structures, as well as for reinforcing and waterproofing asphalt concrete overlay applications on both new and existing reinforced concrete bridge decks;

Suitable for other waterproofing projects subject to dynamic loads.

Packaging, Storage, and Transportation

• Packaging: Sealed in special packaging film.
• Storage: Products of different types and specifications should be stored separately and must not be mixed. Protect from direct sunlight and rain, and ensure adequate ventilation. The storage temperature should not exceed 50°C. When stored upright, products must be stacked in a single layer; during transportation, they may be stacked upright in no more than two layers. Under normal storage and transportation conditions, the shelf life is one year from the date of manufacture.
• Shipping: Prevent tilting or lateral pressure during transport; cover with a tarp if necessary.

Performance Metrics

Applicable Standard: JC/T 974-2005 "Modified Asphalt Waterproofing Membranes for Roads and Bridges"

Performance Characteristics of Rolled Materials