Linnhoff plant overcomes logistical challenges on Tema road project

Linnhoff asphalt plant overcomes logistical challenges on TEMA ROAD PROJECT

A Linnhoff TSD1500 MobileMix asphalt plant achieved remarkable progress on the high-profile grade separation of the Tema Motorway Interchange project in Ghana.

The roundabout at the interchange had been troubling motorists with its severe traffic congestion, which often exceeded 1 km during peak hours, and had become a pressing issue for the government to tackle.

The Project for the Improvement of Ghanaian International Corridors was therefore implemented – one of the priority projects proposed in the West Africa Growth Ring Corridor Master Plan. A US$57 million (R909 million) grant from the Japan International Cooperation Agency soon followed in aid of this project.

The motorway interchange at Tema, Ghana’s largest port city, forms the crossroads of two of the country’s busiest international corridors: the National Highway 1 (N1), which hugs the Ghanaian coastline virtually all the way between its borders with Ivory Coast and Togo; and, in the far east, National Highway 2 (N2), its main north-south highway, which leads up to the border with Burkina Faso.

The Linnhoff TSD1500 MobileMix asphalt plant produced 52 000 t of hot mix asphalt for the project

Scope of works

In February 2018, work on the Tema Motorway Interchange began, transforming the roundabout into an interchange with an underpass. Also included in the scope was the construction of a 2.1 km three-lane dual carriageway with 730 m underpass on the N1, and the improvement of 1.9 km of two-lane dual carriageway on the N2. It also included the paving of five service roads and eight ramps for right-turning traffic, a 190 m long box-culvert underpass, four disabilityfriendly pedestrian bridges, traffic signals, street lighting, and other safetycritical features.

Each of the four main mobile modules of our Linnhoff TSD MobileMix asphalt plants comes with a built-in chassis, so they are much easier to mobilise as they can all be quickly dismantled and transported, as only prime movers are needed.” – Lee Yen Meng, CEO, Lintec & Linnhoff Asphalt Pte Ltd.

The Tema Motorway Interchange project is expected to ease traffic congestion and boost trade with neighbouring countries

Work on the Tema Motorway Interchange began in February 2018 where the Linnhoff TSD1500 MobileMix asphalt plant churned out 100-120 tph of hot mix asphalt

Hot mix production

The Linnhoff TSD1500 MobileMix asphalt plant consistently churned out 100 to 120 tonnes per hour (tph) of hot mix asphalt, playing a crucial role in keeping the project on track. Overall, it produced around 52 000 tonnes of hot mix asphalt for the construction of a total of 150 000 m2 of asphalt works, for use in the base, binder and wearing courses.

The plant’s unique dual-function screen drum technology enables both the drying and screening of aggregates to be processed in the same drum, eliminating the need for a hot elevator and vibrating screens. Not only does this reduce fuel consumption and emissions, but maintenance is easier too, reducing costly downtime.

Plant deployment and mobility

All of the four main mobile modules that make up each Linnhoff TSD MobileMix asphalt batch plant are pre-assembled at the factory, before undergoing rigorous test cycles to ensure smooth setup once they reach the jobsite. And, being equipped with a hydraulic powerpack self-jacking support system, there is no need to employ large cranes for the installation and dismantling processes, meaning plant operation can begin more quickly.

By offering important advantages in terms of enhanced mobility, the Linnhoff TSD series is ideal for use in remote locations or short-term projects. After the work on Tema Interchange was completed, the plant was moved to the National Trunk Road N8 jobsite. The mobility of the plant is extremely beneficial, especially when the contractor moves on to different projects, explains Lee Yen Meng, CEO, Lintec & Linnhoff Asphalt Pte Ltd.

“In Africa, renting cranes can be difficult and expensive, and then finding suitable trucks to transport the individual modules is even more costly. However, each of the four main mobile modules of our Linnhoff TSD MobileMix asphalt plants comes with a built-in chassis, so they are much easier to mobilise as they can all be quickly dismantled and transported, as only prime movers are needed,” says Lee.

Socio-economic connections

According to B&FT Online, the improvements in the Tema Motorway Interchange are expected to shave 15 minutes off the 20-minute delay that motorists used to experience at the old roundabout. It will also improve the capacity, safety and efficiency of the surrounding transportation network.

This high-quality road infrastructure will lead to vastly improved logistics to and from Tema Port, boosting trade with neighbouring countries. It will bring a better future for all people in the region, contributing not only to Ghana’s economic growth, but also the economic development of West Africa as a whole.