Challenge – Creating a Reliable Lifeline for the Neediest

One of the least developed countries in the world, the new country of South Sudan faces enormous challenges. Large parts of the country lack basic road infrastructure, which severely impacts all aspects of life: from farming to economic opportunities, the perilous political-security situation, and a mounting refugee and food crisis.

One vital strategy to address the chronic food insecurity, improve livelihoods and stimulate rural development is to improve the rural road infrastructure and provide access to markets. This would also enable critical aid to get in to those in need.

Creating a reliable road network using locally available resources

Neoloy Tough-Cells – Best Road Performance Achieved Using Locally Available Resources

The United Nations Office of Project Services (UNOPS) worked with the Engineering firm of WSP|Parsons Brinckerhoff to provide an optimized pavement design for 225 km of roads in four regions. Conditions included poor subgrade, high traffic loading, and a lack of quality aggregate.

The solution was to build permanent roads with guaranteed long-term performance. This was not just another engineering challenge – it was literally creating a new lifeline for the country. After extensive investigations, WSP proposed the only fast, strong, durable and cost effective solution Neoloy Tough-Cells. UNOPS then submitted the proposed solution for an independent engineering evaluation by ARUP Engineering Consultants to validate the design.

International assistance making an impact on local populations in need

Engineering Design Assumptions Confirmed: Only Neoloy Tough-Cell Provides Long-Term Stabilization For Permanent Roads

 The bid specifications for the geocells issued by UNOPS were based on the following design considerations:

• Mechanistic design analysis
• Use of low quality infill material
• Overall stiffness required for expected stresses and strains
• Limited allowable creep for pavement life cycle

PRS was awarded the UNOPS bid for the the Supply and Delivery of Neoloy or approved equivalent for the manufacturer and delivery of 1½ million sqm of geocells within 16 weeks. Neoloy is the only geocell that met the project requirements for elastic stiffness, creep resistance and tensile strength.

The road design includes a wearing course, a formation level and in-situ material roadbed. The Neoloy Tough-Cells are incorporated in the wearing course with significant overfill. The road is basically constructed from sand, with the higher quality sandy-gravel infill limited to the wearing course.

Sustainable solution to improve people’s lives – built better, faster and at lower cost

Key Benefits

• Low Cost – 50% Cost Savings Compared to Conventional Design
• Fast – 35% Reduction in Construction Time
• Better Road Performance, comparing to any other solution tested
• Sustainable Objectives Achieved
• Improving People’s Lives

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