DC-ETC Two-Stage Curing Epoxy Adhesive

Overview:

This product is a hot-melt epoxy interlayer adhesive with two-stage curing properties. After preliminary curing at room temperature, it does not adhere to paving equipment wheels. Under the influence of asphalt's high temperature, it melts and undergoes secondary curing, bonding the upper and lower layers firmly to prevent delamination or slippage.

This two-stage curing epoxy adhesive can be used with epoxy asphalt mixtures, mastic asphalt mixtures, and conventional SMA/AC asphalt mixtures. In particular, its combination with mastic asphalt mixtures has demonstrated excellent results while significantly reducing time and material costs.

Applications:

When used as a waterproof adhesive layer, the protective layer can be hot-mix epoxy asphalt mixtures or mastic asphalt mixtures.

When used as a bonding layer, the following combinations of protective and wear layers are available:

Layered Structure Schematic:

Wear Layer

Two-Stage Curing Epoxy Adhesive (Bonding Layer)

Protective Layer

Two-Stage Curing Epoxy Adhesive (Waterproof Bonding Layer)

Epoxy Zinc-Rich Primer

Steel Plate, Sandblasted to Sa2.5

Product Features:

Initial curing at room temperature, melting and secondary curing at high temperatures.

High elasticity, with elongation exceeding 200%.

Compatible with various mixtures (epoxy asphalt, mastic asphalt, SMA/AC asphalt), providing strong adhesion.

High bonding strength, with adhesion to steel exceeding 3 MPa.

Technical Specifications:

Complies with Section 4.2.1 of the Highway Steel Bridge Deck Paving Design and Construction Specification (JTG/T 3364-02-2019) for Type II Epoxy Adhesives. Significantly exceeds standard requirements for tensile strength, elongation at break, adhesion to steel, and adhesion to various asphalt mixtures, matching or surpassing similar imported products.

Instructions for Use:

Sandblast steel panels and mill concrete panels to remove rust, oil stains, laitance, and dust from the surface.

Measure and mix components A and B in the correct ratio, or directly use one container of component A with one container of component B.

The mixed adhesive can be applied by roller coating or high-pressure spraying with a sprayer.

Allow the bonding layer to cure until it reaches initial curing (non-tacky to the touch) before proceeding with the asphalt overlay. The curing time varies depending on the temperature, as shown in the table below:

Precautions:

Except for base treatment, the construction methods for the waterproof bonding layer and the bonding layer are identical.

Ensure thorough and even mixing, paying attention to dead corners. The mixed adhesive should be a uniformly colored liquid.

Use the mixed adhesive as soon as possible, especially if it begins to heat up. Pay close attention to the workable time.

If the ambient temperature is below 15°C, crystallization may occur in component B. Heat the material to above 40°C to dissolve the crystals. This does not affect product performance.

If the material is not fully used after opening, it must be sealed tightly as soon as possible.

Reference Consumption:

Approximately 0.4–0.5 kg/㎡ when used as a waterproof bonding layer.

Approximately 0.5–0.6 kg/㎡ when used as a bonding layer.

Transportation and Storage:

Protect from rain, direct sunlight, packaging damage, and moisture during storage and transportation.

Store in a cool, dry place away from fire sources.

Shelf life: 24 months from the date of production.

This product is non-hazardous and can be transported as general goods.

Packaging Specifications:

20L iron drums or customized packaging as per user requirements.