PG-76 Crumb Rubber Asphalt Solution for Double Chip Seal on Mining Roads in Indonesia

Asphalt is a widely used road pavement material due to its durability, slip resistance, and noise absorption. However, extreme conditions such as high temperatures, heavy traffic loads, and mining environments demand stronger and more durable asphalt innovations.

One such innovation is the modification of asphalt using crumb rubber (CR) derived from recycled used tires. Crumb rubber improves asphalt performance in high temperatures, low-temperature cracking, fatigue, and aging. Moreover, it helps reduce tire waste and supports environmental sustainability.

In its implementation, CR can be mixed into asphalt using the wet process. In this method, CR is directly reacted with asphalt, resulting in a homogeneous mixture with better adhesion and elasticity.

One enhanced form of crumb rubber is PG-76 CR, which is modified to improve resistance to permanent deformation, cracking, and moisture. PG-76 has higher viscosity and structural strength compared to regular CR, making it highly suitable for extreme conditions such as in mining areas.

PG-76 CR is ideal for the double chip seal method, which involves applying two layers of asphalt and aggregate over existing road surfaces. This technique effectively strengthens the wearing course, improves resistance to water and air, and significantly extends road service life.

Double chip seal with PG-76 CR offers multiple benefits: resistance to extreme weather, strong interlayer bonding, and significant reduction of noise and dust. For mining roads in Indonesia—often exposed to temperature variations, heavy equipment traffic, and extreme terrain—this technology provides a long-term, efficient, and eco-friendly solution.

By using PG-76 crumb rubber modified asphalt and the double chip seal method, companies can reduce maintenance costs, extend road life, and support productive tire waste management. This is a strategic move towards sustainable and modern mining infrastructure.