The Effect of Pozzolanics on the Recycled Aggregates by Surface Treatment
To improve the mechanical properties of concretes containing recycled aggregates, pozzolanic materials such as Silica Fume and Meta Kaolin were used to decrease the porosity of the recycled aggregates. These pozzolanic aterials 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 reached above 95% of the strength of its natural counterparts. Investigation of the microstructures using the scanning lectron micrographs showed the formation of dense interface after the adsorption treatment of pozzolanics to recycled aggregates.
Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee
J. J. Kim et al., "The Effect of Pozzolanics on the Recycled Aggregates by Surface Treatment ", Materials Science Forum, Vols. 486-487, pp. 305-308, 2005