THE EFFICIENCY OF VARIOUS TOXIC GAS EMISSION NEUTRALIZERS IN SULFUR-ASPHALT CONCRETE TECHNOLOGY

Abstract

In the manufacture and installation of sulfur-asphalt concrete mixtures, chemical reactions occur, accompanied by the release of toxic gases - hydrogen sulfide and sulfur dioxide. This significantly limits the use of sulfur for the manufacture of sulfur-asphalt concrete. One of solutions for the problem above is adding neutralizing agents into the composition of the sulfur modifying converter. As neutralizing agents sulfur modifying additives chemically interact with hydrogen sulfide and sulfur dioxide to form sparingly soluble or insoluble compounds, such as manganese oxide, zinc oxide, copper oxide, zinc, dolomite, diatomite. The kinetics of hydrogen sulfide gas (H ₂ S) and sulfur dioxide (SO ₂ ) emissions are presented as well as their dependences on the type of neutralizer. A comparative analysis of the intensity of toxic gas emission from a sulfur-bitumen binder is carried out. A description is given of an experimental setup for determining changes in the intensity of toxic gas evolution and the effect of neutralizers. Studies of the advantages of sulfur-asphalt concrete with toxic gas emission neutralizers show that their use reduces the amount of emission of these gases and improves the environmental problem of using sulfur-asphalt concrete.