Asphalt VOCs reduction of zeolite synthesized from solid wastes of red mud and steel slag

摘要

Asphalt material releases VOCs (Volatile Organic Compounds) during its paving and service periods. Therefore, it is an urgent need to conduct research on VOCs reduction in asphalt materials. This research reused red mud and steel slag to synthesize zeolite for asphalt VOCs reduction purpose. Two-step hydrothermal method was used and the optimized synthesis conditions were studied. The performance of asphalt VOCs reduction resulted from the optimized zeolite was also discussed. Research results indicated that zeolite Y with a specific surface area in 685 m(2)/g and pore volume in 0.07 cm(3)/g can be obtained by reusing red mud and steel slag. The pore size of the optimized zeolite is mainly concentrated between 2 and 6 nm. Moreover, addition of optimized zeolite signifi-cantly reduces the volume of asphalt VOCs by more than 45%. The incorporation of 5% zeolite performs best in adsorption experiments with the absorption capacity in 60%.

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