Double Chip Seal Application of PG-76 Polymer Asphalt for Mining Roads in Indonesia

Coal mining roads in Indonesia, such as those in Kalimantan and Sumatra, face extreme environmental conditions—including heavy traffic loads, high dust levels, waterlogging, and soil erosion. These factors cause surface damage and result in high maintenance costs. Therefore, a strong, durable, and cost-effective pavement preservation solution is needed.

One potential solution is the application of hot double chip seal using PG-76 polymer asphalt. This technology involves applying two layers of hot asphalt and crushed aggregate sequentially over the existing road surface. This method creates a new wearing surface that resists cracking, raveling, and bleeding.

The use of hot double chip seal can improve skid resistance, waterproofing, and road aesthetics. Additionally, this method can reduce noise and dust in the surrounding mining environment.

The use of PG-76 polymer asphalt —modified with styrene-butadiene or styrene-butadiene-styrene (SBS) polymers—adds significant value. This asphalt has higher viscosity and elasticity compared to conventional asphalt, and it is more resistant to extreme temperatures and aging. It provides better adhesion and cohesion, enhancing the chip seal's durability under heavy traffic loads.

According to studies from the Asphalt Emulsion Manufacturers Association (AEMA), the use of PG-76 asphalt for hot double chip seal can reduce life-cycle costs by up to 25% compared to regular asphalt. Furthermore, this technology can extend road service life by up to 7 years and reduce maintenance frequency by up to 50%.

With all these advantages, hot double chip seal using PG-76 polymer asphalt is an ideal choice for mining road applications in Indonesia. This solution not only offers long-term durability but also cost-efficiency and environmental benefits.