20 Jun 2023
Beneath the surface of Ethiopia's roadways lies a treasure trove often overlooked - the "black gold" of asphalt
By Yoseph Gettu
20-June 2023
Beneath the surface of Ethiopia's roadways lies a treasure trove often overlooked - the "black gold" of asphalt. Paradoxically, this invaluable resource, which holds the potential to fuel economic growth, is being discarded and left unused. The practice of disposing of old asphalt, observed along routes such as the Old Mojo-Hawassa and Adama-Awash roads, raises pertinent questions about sustainable resource management and missed economic opportunities. This blog post delves into the concept of "black gold" - asphalt - that is being squandered, and explores the manifold advantages of harnessing this resource through recycling and innovative technologies.
The Unseen Riches:
As asphalt pavements age and are replaced, a remarkable resource goes to waste. This "black gold," known for its durability and versatility, could be the cornerstone of economic revival if properly managed.
A Missed Opportunity: Recycling and Its Potential:
While the current scenario might seem disheartening, it's crucial to recognize the untapped potential for revitalizing Ethiopia's infrastructure and economy. The introduction of asphalt recycling practices, like cold in-place recycling (CIR), and Foam Bitumen Technology represents a transformative solution:
1. Resource Conservation: The discarded old asphalt contains valuable aggregates and bitumen that can be rejuvenated through recycling. CIR involves milling, repurposing, and relaying the old material, significantly reducing the need for new resources.
2. Economic Efficiency: By reusing existing asphalt, the cost of raw materials and transportation is minimized. The funds saved can be redirected to other vital development initiatives.
3. Local Empowerment: Recycling operations necessitate a skilled workforce, offering job opportunities and skills development that empower local communities.
The Weight of Waste: Foam Bitumen Technology:
While asphalt recycling might be in its nascent stages in Ethiopia, innovative technologies like foam bitumen hold the promise of turning discarded "black gold" into a driving force for change:
1. Local Advantages: Foam bitumen technology has the potential to leverage locally available materials, reducing dependency on external resources and bolstering local economies.
2. Sustainability in Infrastructure: Repurposing old asphalt through foam bitumen treatment enhances pavement durability and decreases the need for frequent repairs. This translates to long-term economic savings and environmental benefits.
3. Community Progress: The adoption of foam bitumen technology requires a skilled workforce, creating opportunities for job creation, knowledge transfer, and community betterment.
The Scenario Unveiled:
Resource Revival: In Uganda, aged road surfaces were recycled using Wirtgen's foam bitumen technology. The process involved injecting water into hot bitumen to create a foamed mixture, which was then combined with reclaimed asphalt pavement (RAP) and aggregates.
Local Advantages: The technology harnessed local resources, minimizing the need for imported materials and bolstering Uganda's economy.
Economic and Environmental Gains: By repurposing old asphalt, Uganda reduced costs associated with new material procurement, while simultaneously diminishing the environmental impact of raw material extraction.
Enhanced Resilience: The implementation of foam bitumen technology enhanced the durability and longevity of road surfaces, resulting in fewer repairs and maintenance efforts.
A Call for Transformation:
The sight of discarded old asphalt, a symbol of wasted potential, calls for urgent action. Ethiopia's journey towards economic resurgence and sustainable development demands a shift in perspective - from seeing waste to uncovering opportunity.