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Modification of fly ash physicochemical properties for using in dispersionhardened bitumen-based pavement

https://doi.org/10.31675/1607-1859-2022-24-6-160-169

Abstract

One of the ways is substantiated to solve the most important environmental problems currently arising in the development and functioning of the heat and power complex. The first is the elimination of fly ash dumps formed during coal combustion. The second is utilization of fibrous sorbents exhausted during the elimination of emergency oil spills, products, shale tars, coal fuses. It is shown that fine ash and asphalt-concrete compositions reinforced with chemical fibers obtained from end-of-life fibrous sorbents, can be used in the pavement construction. The number of properties of hydraulic fly ash and neutralization of sesquioxides contained in them are improved. The latter are catalysts for oil bitumen aging. It is shown that the proposed solutions lead to a decrease in the bitumen content in the fly ash, increase in average density, decrease in porosity and true density. This provides its use in construction of reinforced pavements without increasing the oil bitumen consumption. Highly active components contained in petroleum products neutralize the ability of sesquioxides to accelerate the aging process of petroleum bitumen, which is confirmed by IR spectroscopy.

About the Authors

V. N. Lukashevich
Tomsk State University of Architecture and Building
Russian Federation

Viktor N. Lukashevich, DSc, Professor

2, Solyanaya Sq., 634003, Tomsk



O. D. Lukashevich
Tomsk State University of Architecture and Building
Russian Federation

Olga D. Lukashevich, DSc, Professor

2, Solyanaya Sq., 634003, Tomsk



R. I. Mokshin
Tomsk State University of Architecture and Building
Russian Federation

Roman I. Mokshin, Research Assistant

2, Solyanaya Sq., 634003, Tomsk

 


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For citations:


Lukashevich V.N., Lukashevich O.D., Mokshin R.I. Modification of fly ash physicochemical properties for using in dispersionhardened bitumen-based pavement. Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture. 2022;24(6):160-169. (In Russ.) https://doi.org/10.31675/1607-1859-2022-24-6-160-169

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ISSN 1607-1859 (Print)
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