AN EXPERIMENTAL EVALUATION OF WORKABILITY AND BLEEDING BEHAVIORS OF ULTRA-SONICATED NANO ZINC OXIDE (n-ZnO) DOPED CEMENT PASTES INCORPORATED WITH FLY ASH

Abstract

In this study, the workability and bleeding behaviors of ultra-sonicated nano zinc oxide (n-ZnO) doped cement pastes incorporated with fly ash have been experimentally investigated. Therefore, the effects of nano zinc oxide (n-ZnO) additions at different amounts by mass (0.0, 0.3, 0.6, 0.9, 1.2, and 1.5%) on the bleeding and the workability properties (mars cone flow time, mini slump spread diameter, and plate cohesion) of cement-based grouts incorporated with fly ash (FA) as mineral additive at different constitutes (0%-for control purpose, 5, 10, 15, 20, 25, and 30%) were investigated. The use of FA as a mineral additive in grout samples resulted in improvements in the workability behavior of the grout samples as expected. Increase amount of n-ZnO in the grout mixtures has made mini slump flow diameter of the samples noticeably decrease. Although certain changes seem to have been observed, it has been understood that the increase in the amount of n-ZnO in the injection matrix generally does not change the Marsh cone flow time of mineral-added cement-based grouts. Remarkable increases in plate cohesion values were measured because of the increase in the content of nano zinc oxide for all mixtures. At the same time, just like the FA effect, bleeding values tend to decrease due to the increase in the amount of nano zinc oxide in grout mixes. Moreover, the results obtained showed that the artificial neural network model can make predictions with very high accuracy.