Reasons for Reduced Moisture Resistance of Sulfur-Extended Asphalt Concrete

The paper presents the results of a study of the mechanism for reducing the moisture resistance of sulfur-extended asphalt concrete. It is shown that a decrease in moisture resistance occurs due to the occurrence of chemical and physical processes. At the same time, it was found that during the manu...

Full description

Saved in:
Bibliographic Details
Published in:Materials 2021-11, Vol.14 (23), p.7218
Main Authors: Le, Huu Tuan, Korolev, Evgenij V, Grishina, Anna N, Gladkikh, Vitaly A
Format: Article
Language:English
Subjects:
Asphalt
Bitumens
Calcium carbonate
Carbonates
Composite materials
Crystallization
Hydrogen sulfide
Hypotheses
Kinetics
Leaching
Magnesium
Moisture resistance
Sulfur
Sulfur content
Water chemistry
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The paper presents the results of a study of the mechanism for reducing the moisture resistance of sulfur-extended asphalt concrete. It is shown that a decrease in moisture resistance occurs due to the occurrence of chemical and physical processes. At the same time, it was found that during the manufacture of sulfur-bitumen composites, toxic gases H S and SO are formed, which are capable of interacting with a mineral filler, as well as the interaction of sulfur with a mineral powder with the formation of sulfur-containing water-soluble salts, the extraction of which leads to a decrease in the moisture resistance of sulfur-bitumen materials. The change in the rate of leaching of these substances from the composite is due to the physical process caused by the crystallization of sulfur and the formation of a capillary structure, which significantly increases the rate of leaching of calcium and magnesium salts, which are products of dissolution or hydrolytic decomposition of water-soluble products of the interaction of sulfur, H S and SO gases with calcium and magnesium carbonates. The intensity of chemical and physical processes intensifies with an increase in the amount of sulfur in sulfur-bitumen materials.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14237218