Ministry of Public Works Supports Plastic-Modified Asphalt Technology for Sustainable Road Infrastructure

Proeksa Meas
13 October 2026
Construction Focus
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MPWT leadership meets Sri Lanka’s AGC Innovate executives to launch a pilot project utilizing PMAC technology capable of recycling up to 3 tons of plastic waste per kilometer

Phnom Penh: Transforming plastic waste into high-performance pavement material has emerged as an innovative engineering solution to reduce environmental contamination, lower road maintenance costs, and strengthen infrastructure durability. In late September 2026, senior leadership from the Ministry of Public Works and Transport (MPWT) convened consecutive technical consultation meetings with representatives from Sri Lanka-based AGC Innovate (Pvt) Ltd to evaluate the deployment of Plastic Modified Asphalt Concrete (PMAC) technology across Cambodia’s national road network.

On September 29, 2026, Secretary of State Ros Vanna led an initial session with AGC Innovate representative Kamesha Samaranayake alongside technical experts from the General Department of Wastewater Treatment Systems and the General Department of Technical Affairs. Discussions centered on technical specifications for blending recycled plastic polymers with conventional asphalt binder. During the presentation, AGC Innovate proposed establishing a joint pilot project to test PMAC technology on local road conditions while identifying strategic partners to scale sustainable waste management solutions nationwide.

Following up on September 30, 2026, Director General of Public Works Heng Rathpiseth hosted Umayanga Nanayakkara, Founder and CEO of AGC Innovate, for a detailed engineering review. Company representatives demonstrated that PMAC improves structural pavement strength, reduces lifecycle maintenance expenses, and offers significant environmental benefits, noting that paving just one kilometer of road can consume up to 3 metric tons of recycled plastic waste. Director General Heng Rathpiseth expressed full ministry support for implementing the proposed PMAC pilot project on Cambodian roads.

The collaboration between the Ministry of Public Works and Transport and AGC Innovate to introduce plastic-modified asphalt marks a decisive step toward green infrastructure development in Cambodia. Integrating plastic waste recycling directly into road construction not only mitigates environmental pollution but also equips the Kingdom with resilient, cost-effective, and environmentally sustainable transport networks. (read more)

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