The efficiency of sulfur modifier to neutralize toxic gases in sulfur-asphalt concrete technology

Abstract

Abstract Studies of the advantages of sulfur-asphalt concrete with toxic gas emission neutralizers show that the use of neutralizers reduces the amount of emission of these gases and improves the environmental problem of the use of sulfur-asphalt concrete. Zinc oxide and zinc oxide are not effective in neutralizing hydrogen sulfide and sulfur dioxide. Reducing the emission of toxic gases using dolomite and diatomite is due to the ability of carbonates to neutralize sulfur dioxide through chemical reactions, as well as absorb gases into the porous structure of grains. Other considered neutralization reactions and side processes according to the calculations mainly occur. The processes of interaction of neutralizers with toxic gases and secondary processes can proceed according to various chemical reactions, however, chemical reactions with the release of more energy occur predominantly. This is confirmed by experimental studies. As a result of theoretical and experimental studies, a list of effective toxic gas neutralizers has been established, the emission of which occurs when bitumen interacts with a sulfur modifier.