FLY ASH'S EFFECT ON CEMENTITIOUS COMPOSITES MANUFACTURED WITH RECYCLING CEMENT'S GEOTECHNICAL EFFICIENCY

The use of concrete as a construction material has become increasingly popular due to its high compressive strength and durability. It is possible to reduce the workability of a regular mortar by approximately four percent by adding up to ten percent recycled concrete powder (RC). This is due to the fact that the larger porosity of the adhering mortar with RC material makes water more necessary. The addition of fly ash (FA) and RC to the mixture has the potential to boost the workability of the mortars by as much as 11.8% respectively. This strategy makes it much simpler to cut down on the increased water use that is related with RC on its own. In general, the fresh-state density of binary mortars that contain RC or FA is lower than that of traditional mortar with the same composition. However, the density that is produced as a result of combining both increases is more than the density that is produced by utilizing either RC or FA. The compressive and flexural strengths of mortars that contain RC (five to ten percent) are relatively decreased when compared to those of regular mortar. The compressive strength decreases by around 9.8% to 14.3% after a year of curing, whereas the flexural strength decreases by approximately 2.6% to 5.0% after the same amount of time. With the addition of FA to mortars that already contain RC, it is possible to improve the mechanical performance of the mortars. When compared to the compressive and flexural strengths of traditional mortar, the ternary mortars exhibit equivalent levels of strength. The ternary mortars have an RC content of 5% and an FA content of 10%. The results of this experiment make it abundantly clear that the best amount to replace cement is 10% RC and 20% FA. A mechanical point of view, the findings of this experiment make this abundantly clear.