Pigments for Asphalt and Road Materials

Durable Coloring for Infrastructure

Deqing Demi Pigment Technology Co., Ltd. is a provider of durable coloring solutions for infrastructure and road building. Our pigments for asphalt and road materials are engineered for maximum longevity and color consistency under heavy traffic, constant exposure to weather, and chemical runoff. By offering a robust range of colors, we support projects aiming for aesthetic differentiation, safety demarcation, and heat island mitigation through colored paving. Our materials are simple to incorporate into standard asphalt mixing processes.

Road and Paving Applications

• Colored Asphalt Pavements: Roads, driveways, and bus lanes for aesthetic and functional demarcation.
• Roofing Shingles and Felts: Coloring of bituminous coatings for weather resistance and heat reflection.
• Sports and Leisure Surfaces: Paving for tennis courts, running tracks, and bicycle paths.
• Sealers and Coatings: Pigmentation of asphalt sealcoats and crack fillers.

Asphalt Grade Pigment Data

Performance in Bituminous Systems

• Thermal Stability: Withstands the elevated temperatures required for hot-mix asphalt production.
• UV & Weathering Resistance: Color remains stable against solar radiation and environmental exposure over the pavement's lifetime.
• Hydrophobic Surface: Low moisture absorption rate prevents clumping and enhances dispersion in the hot bituminous mixture.
• Chemical Compatibility: Inertness ensures no adverse reaction with the binder or pavement additives.

• Q: Does the pigment impact the structural properties of the asphalt?

  A: No, when used at recommended dosages (typically 2% to 6% by weight of the binder), the inorganic pigment acts as an inert filler and colorant. It does not negatively impact the Marshall stability, rutting resistance, or other key mechanical properties of the asphalt mix.

• Q: Are the colored pigments available in liquid forms for easy incorporation?

  A: While the core material is a powder, we offer specific grades that are easily dispersed into oil or wax-based slurries by clients or partners, allowing for automated liquid dosing directly into the asphalt mixer for enhanced convenience and dust control.

Batching and Distribution Support

Our production capacity is optimized for large-volume orders required by major road construction projects. We provide the pigment in various packaging sizes, from small bags to bulk containers, accommodating different batching plant configurations.

Dispersion Guidance: We provide technical consultation on optimal mixing sequence and time required to achieve homogeneous color distribution in both batch and continuous mixing asphalt plants, minimizing spot defects.

Infrared Reflectance and Color

For road materials, our color solutions extend beyond visible color (measured in L*, a*, b*). We offer pigments specifically formulated to meet high Solar Reflectance Index (SRI) requirements, particularly in lighter colors (yellows, whites). This is crucial for mitigating the Urban Heat Island (UHI) effect. We provide specific reflectance data (near-infrared measurement) to demonstrate how our colored pavements contribute to reducing surface temperature and extending the pavement life by minimizing thermal expansion stress.