Experimental Study on Superficial Modification of Recycled Aggregate with Fly Ash
A modification of using fly ash grout of different levels was adapted to treat the surface of recycled fine aggregate (RFA).The physical properties of RFA before and after modification and the effect on the mechanical performance of cement mortar was studied.The result indicated that the modification of RFA could strengthen the enhancement effect on mechanical performance when modified by 15wt% fly ash grout. After modification, water absorption of RFA was 6.12% and decreased by 47.5%. The 28d flexural strength was increased by 17.4% and compressive strength was increased by 24.2% of RFA cement mortar compared with the reference samples. The superficial microstructure and sectional morphology of RFA was observed by scanning electron microscopy (SEM). The modification mechanism was carried out.
HJ. Patthi Bin Hussain, Zhu Yuesheng, Murthy Rallapalli and Jamaluddin Mahmud
F. X. Wang et al., "Experimental Study on Superficial Modification of Recycled Aggregate with Fly Ash", Applied Mechanics and Materials, Vols. 541-542, pp. 384-387, 2014