TRL and Qatar release study on recycled steel slagby Jochebed Menon on Apr 12, 2017
A new study listing the uses of recycled steel slag, and how it can help reduce the overall environmental impact and improve sustainable development has been released in Qatar.
Qatar Ministry of Municipality and Environment (MME), Ashghal, and Qatar Steel, released the report in collaboration with UK-based Transport Research Laboratory (TRL).
The study was announced during a forum held on the ‘Optimisation of Steel Slag in Construction today’ at the Marriott Hotel in Doha.
During the forum, TRL revealed the project outcomes of the study, which represents the cooperation made between the government and construction industry.
The study, which was conducted over the last 30 months, was aimed at creating and developing innovative and highly useful applications of steel slag in asphalt, concrete, and unbound construction applications.
TRL delivered the project in collaboration with the specifier (MME), the client (Ashghal), slag producer (Qatar Steel), slag supplier (Environmental Building Material-EBM), and contractor (Boom Construction).
Over the last few months, TRL led the initiative to convert steel slag from being a waste material to a high-value product suitable for use in the construction industry.
“We are very pleased and satisfied with the results of the study, which solidifies our decision in selecting TRL,” said Ali Al-Muraikhi, managing director and general manager of Qatar Steel.
Qatar Steel has accumulated large quantities of steel slag from its factory in Mesaieed, located south of Doha – exceeding more than 350,000 tonnes annually with stockpiles of materials amounting to over 1.6 million tonnes.
To avoid land disturbance and waste accumulation, Qatar Steel appointed TRL to identify a potential market for the use of steel slag in construction.
The activities of the study included a review of local and international information on the use of slag products in construction, development of asphalt and concrete products made with steel slag.
It also covered the potential use of fine slag aggregate to replace dune sand in improving the properties of unbound subbase materials for road construction.
Full scale road trials were constructed on Qatar Steel site to demonstrate the successful use of steel slag in the various road layers of asphalt base and unbound subbase.
The road was constructed in 2016 with excellent performance of the slag road sections as compared to the conventional road section.
In addition, pre-cast concrete elements of crash barriers, soakaways, manholes, kerbstone and solid blocks were produced to demonstrate high-value applications in the concrete industry.