Application of wood powder for asphalt CO2 emission reduction

In this study, we examined the capacities of three additives, viz. wood powder, Al(OH)(3)-loaded wood powder, and Mg(OH)(2)-loaded wood powder, to reduce the emission of CO2 from heated asphalt. We analyzed the effects of particle size and amount of wood powder additive, as well as the loading quantity of Al(OH)(3)/Mg(OH)(2), on the concentration of CO2 emission from heated asphalt. We performed surface morphology and elemental analyses of the modified and unmodified wood powders by scanning electron microscopy in combination with energydispersive X-ray spectroscopy. The results indicated that using wood powder additives reduced the emission of CO2 from asphalt at high temperatures. Loading Al(OH)(3)/Mg(OH) (2) was also found to improve the results. The optimal wood powder particle size, amount of wood powder additive, and Mg(OH) (2) loading amount were determined to be 80-100 mesh, 2%, and 4%, respectively. Specifically, the rate of reduction of CO2 emission from asphalt reached 92.9-97.9% under these optimal conditions.