A new technology for cement production from waste was created in Tomsk
Researchers from the Tomsk State University (TSU) have found a new way of concrete production from blast furnace slags. Concrete based on new cement is cheaper and stronger than traditional.
The waste of the metallurgical industry is a raw material for the cement. According to the TSU press service, this technology was tested at one of the concrete plants in Novosibirsk and is ready for industrial application. The cement production does not require the clinker burning — a mixture of clay and limestone — that significantly reduces the cost.
«A slag concrete made on the clinker-free cement basis has many advantages. It has a high resistance to chlorides, sulphates and acids. It has less capillary pores, that significantly reduces water absorption and increases frost resistance», Ilya Mazov, the TSU representative said. According to the researches` calculation, the cost of slag concrete laying during the routes construction is about half the cost of traditional asphalt concrete laying.
The technology of slag concrete production was created in USSR in the 1950s, the university press service said. Durable concrete was used in constructions at the Baikonur Cosmodrome and in caves for submarines. Such concretes are now in demand in the EU countries. About half of the concrete produced in the Netherlands is a slag concrete.
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