Preliminary Investigations of the Conversion Seal as a Mineral Pow-der for Asphalt-concrete Mixtures
Year: 2018
Type: article
Abstract: Analysis of the current situation in the field of road construction showed that while building roads, in particular when preparing asphalt mixtures, it is necessary to use a large amount of high-quality mineral powder.The solution of this problem can lie in the plane of expanding the raw material resources through the use of carbonaceous waste (conversion carbonate chalk).Conversion of calcium carbonate is a byproduct formed during the release of nitrogen fertilizers and can become a substitute for the traditionally used limestone mineral powder.It was noted that the investigated waste in terms of chemical and granulometric composition is similar to the traditional mineral powder.However, the surface of the grain of the conversion chalk sample has a much more complex surface relief, with a large number of depressions and depressions, which provides the grain with a larger specific surface compared to the same grain of the traditional material.This feature can lead to a higher structuring ability of such a mineral powder in relation to an organic astringent and phenomena of selective adsorption of bitumen components on its surface.Preliminary studies of the feedstock showed that for a combination of properties, conversion chalk can be used as a raw material of a suitable mineral powder for asphalt concrete.
Institution: Belgorod State Technological University
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2807280997