The Recycled Aggregates with Surface Treatment by Pozzolanics
To improve the mechanical properties of concretes containing recycled aggregates, pozzolanic materials were used to decrease the porosity of the recycled aggregates. These pozzolanic materials were adhered on the surface of recycled aggregates and closed the open pores so that the water absorption was decreased 1~2% as the amount of adsorption was increased. Compressive strength of cement mortars and concretes using surface treated recycled aggregates reaches above 95% of the strength of its natural counterparts. Investigation of the microstructures using the scanning electron micrographs showed the formation of dense interface after the adsorption treatment of pozzolanics to recycled aggregates.
Hai-Doo Kim, Hua-Tay Lin and Michael J. Hoffmann
J. J. Kim et al., "The Recycled Aggregates with Surface Treatment by Pozzolanics", Key Engineering Materials, Vol. 287, pp. 63-68, 2005