Emission Characteristics, Environmental Impacts, and Health Risks of Volatile Organic Compounds from Asphalt Materials: A State-of-the-Art Review

Abstract

The emission of volatile organic compounds (VOCs) from asphalt during construction processes presents substantial risks to human health and the environment. To advance sustainable transportation development, this review offers a comprehensive study of the methods for characterization, release characteristics, influencing factors, release mechanisms, and environmental impacts of asphalt VOCs. At present, research has been conducted on characterization methods, component characteristics, influencing factors, and environmental and health risks. The findings indicate that gas chromatography–mass spectrometry is the most comprehensive method for characterizing asphalt VOCs. Asphalt VOCs mainly comprise alkanes, aromatics, and aliphatic hydrocarbons. Factors including the temperature, asphalt source, and ultraviolet radiation can all affect the release characteristics of asphalt VOCs. Elevated VOC levels contribute to the photochemical production of ozone and fine particulate matter, exacerbating air pollution and climate change. Additionally, specific asphalt VOCs, including benzene and polycyclic aromatic hydrocarbons, pose health risks to humans. While progress has been achieved in the current research, challenges persist in quantifying VOCs, assessing their environmental impacts and health risks, and implementing effective mitigation technologies. To address these challenges, future research should focus on establishing asphalt VOC fingerprints, quantitative methods, evaluation criteria, material innovation, optimization of construction processes, exposure assessment, and collaborative solution implementation.

Effect of the Inorganic Modification Mode on the Mechanical Properties of Rubber Recycled Concrete

“…And the extent of the effect of rubber particles was greater than that of recycled aggregate. The reduction in the compressive strength, the splitting tensile strength, the flexural strength, the axial compressive strength, In summary, the three modification methods on the modulus of elasticity of concrete were ranked as follows: alkali washing > acid washing > water washing [40]. The alkali washing modification method showed the greatest improvement in the modulus of elasticity of concrete, with a maximum of 11.19%.…”

“…The modification methods of rubber water washing, rubber alkaline washing, and rubber acid washing were improved by an average of 4.57%, 7.45%, and 5.96% when the recycled aggregate and rubber particles were mixed with 100% and 5-20%, respectively. In summary, the three modification methods on the modulus of elasticity of concrete were ranked as follows: alkali washing > acid washing > water washing [40]. The alkali washing modification method showed the greatest improvement in the modulus of elasticity of concrete, with a maximum of 11.19%.…”

Feasibility Analysis of Resource Application of Dry Flue Gas Desulfurization Ash in Asphalt Pavement Materials

“…The difficulty in recycling DFGDA results in the waste of potential resources and environmental pollution because DFGDA contains abundant calcium sulfate hemihydrate, The unstable calcium sulfite during utilization is easily and slowly oxidized to calcium sulfate in humid environments and then decomposed to sulfur dioxide under acidic or high-temperature conditions [7,8]. Therefore, the application of DFGDA in asphalt pavement materials has rarely been reported [9,10].…”

Study of the Performance of Emulsified Asphalt Shotcrete in High-Altitude Permafrost Regions

“…This material is widely used in tunnel lining structural supports and in various repair and reinforcement projects; additionally, this material has good economic efficiency and a short construction period, among other characteristics [1][2][3]. Moreover, the combination of reinforcement meshes, anchor rods, and other support tools can significantly improve the protection provided by structures [4]. The main spraying methods used for shotcrete are dry spraying and wet spraying [5].…”