Adhesion of Bitumen to Minerals

• Published in: Coke and chemistry (New York, N.Y.) Vol. 65; no. 1; pp. 24 - 32
• Main Authors: Ivkin, A. S., Vasiliev, V. V., Salamatova, E. V., Povarov, V. G., Maidanova, N. V., Kalinin, M. V., Strakhov, V. M.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 2022; Springer Nature B.V
• Subjects: Adhesion; Aluminum oxide; Biotite; Bitumens; Chemistry; Chemistry and Materials Science; Gabbro; Gneiss; Industrial Chemistry/Chemical Engineering; Minerals; Silicon dioxide; rock; minerals; roadway surfaces; elemental composition; bitumen; durability; adhesion
• ISSN: 1068-364X; 1934-8398
• DOI: 10.3103/S1068364X22010033

The adhesion of 28 minerals with highway-grade bitumen is assessed, in terms of the surface area of the mineral (%) still coated with bitumen after boiling in water. With increase in the total content of CaO, MgO, Fe
2
O
3
, and Al
2
O
3
, the adhesion of bitumen to the minerals increases, whereas the adhesion decreases with increase in the content of SiO
2
, Na
2
O, K
2
O, and CO
2
. After boiling, the bitumen at the rock surface is not distributed randomly but is concentrated at specific mineral grains: biotite in the case of granite and gneiss; and pyroxene in the case of gabbro.