ROSDORNII and SibADI worked together on the feasibility study of the project - scientists came to the conclusion that ash and slag materials are excellent for road construction.
This will solve two problems at once: environmental and economic. It will be possible to at least partially clear up the mountains of waste and deal with the issue of the lack of soil in the region for such a large-scale construction. It is planned to lay 5 million tons of ash and slag in zempolotno. For comparison, if you use a more traditional material - sand, then it will take 10 years for the river port to extract the required amount.
The properties of ash and slag materials that did not burn in the furnaces of Omsk thermal power plants were studied comprehensively in SibADI. They were frozen, baked, watered with chemicals, mixed with cement, diluted with water and conducted many other experiments to understand whether waste could be used for road construction.
"Using this compression compression device, we determine the physical and mathematical properties of the soil. After the test, we can see the results on the computer. 00131 01.04 - 01.08 It is this sample that is suitable for the construction of the lower part of the roadbed," explains the 5th year student of SibADI Igor Lazutkin.
Embankments of ash and slag waste will be erected during the construction of the Northern Bypass. Constructive and technological solutions were developed by RosdorNIA experts, based on the research of Omsk scientists. As it turned out, ash slags are a very interesting material: porous, light, which will protect the road from sagging and freezing. And at the same time very cheap - because no one needs it.
"At the moment, these materials are unclaimed, they are a by-product of thermal power engineering. In the process of burning coal, we get these same ash and slag materials that have been stored for years in specialized ash dumps. Now we can bring them into an air-conditioned condition, get them and use them on the road. Since for the construction of such a large-scale object as the Northern Bypass, we simply do not have a reserve of soil in the region that can be used for these purposes," says Alexander Lunev, associate professor of the Department of Road Design at SibADI.
There is little soil, but there is a lot of waste. According to scientists, about 75 million tons of ash and slag have already accumulated on the dumps of Omsk thermal power plants. 5 million - at least! - rolled into asphalt during construction Northern bypass.
They tried to put waste from the CHP into operation in Omsk back in the 80s. A number of roads in the center were built using ash-mineral mixtures, but that was almost the end of it. After that there were only single objects. For example, the roads on the ash dumps themselves.
Meanwhile, according to SibADI, ash and slag materials have a great future. They can be used not only in the construction of new roads, but also in the repair of old ones, as well as for the reclamation of landfills. All the necessary studies have already been carried out, it remains to implement the projects in practice. The first of them is likely to be the construction of the Northern Bypass, which is expected to begin after 2024.