Optimizing fly ash and rice husk ash as cement replacements on the mechani-cal characteristics of pervious concrete

Replacing cement with fillers while being environment-friendly contributes to the performance enhancement of conventional concrete. In the investiga-tion, nine batches of concrete mix were prepared with different amounts of cement, fly ash (FA) and rice husk ash (RHA). This experiment investigated the consequence of substituting cement with FA at various water-to-binder (W/B) proportions. The FA content was ranged from 5% to 20% of cement by weight, and the W/B ratio was adjusted to 0.3, 0.35, 0.4, and 0.45. Further-more, for 10% cement replacement, FA and RHA combination of 10:0, 7.5:2.5, 5:5, 2.5:7.5 and 0:10 by weight were used. When FA alone was used as cement replacement, the optimal mix achieved a 28-day…

• UO
  University of Jaffna