The final stage of the competition of innovative projects of students of the Engineering and Technology University of Turkmenistan named after Oguz Han is completed. It was aimed to identify the creative abilities of students, promote them to research activities, as well as assist them to apply acquired knowledge into practice.
The project on efficient utilization of metallurgical slag, a by-product of metal production, and its further application in industry, presented by Annadjemal Byashimova, a student at the Department of Chemistry and Nanotechnology, was of interest of experts.
The interest in the project is obvious as slags allow manufacturers of dry construction mixtures, cement, paving to reduce the cost of their products and improve their quality.
Slag remains after the metal melt and, at the same time, it is the main product of melting process, it contains oxides of iron, aluminum, silicon, magnesium, calcium, etc.
“Due to its softness and fragility, normal slag is not used in production. But ground slag is harder, therefore it can be used in construction, cement and concrete production,” Annadjemal said.
So, ground slag is an excellent substitute for crushed stone in road construction. The material is durable and able to take high and low temperatures. To increase the density of slag, ordinary chalk can be added, and then, the hardened mass can be used in the production of building blocks.
“Since the slag contains iron oxide, it is not resistant to corrosion. But it can be fixed. To do this, the tile glue that produced in our country should be applied to the surface of structure. Tile glue has a waterproofing property, that is, it does not like water. Therefore, it will not let moisture go through,” the author of the project told.
Slag casting is used for production of tiles and stones to make borders, paving, the quality of which is not worse that reinforced concrete analogues.
“The use of slag in production, first of all, will have an eco-friendly effect. It would help refrain from slag storage and its accumulation that takes a long time and pollutes the environment. In addition, using slag in construction is financially sound,” Annadjemal noted.
It proves that technogenic waste can be a useful resource, and the idea of using it as a raw material or material to replace natural exhaustive sources is worthy of the attention of the rapidly growing construction materials business in the country.