Research Information System
Iranian Journal of Science and Technology, Transactions of Civil Engineering, vol.46, no.7, pp.1-15, 2023 (SCI-Expanded)
In this study, environmentally friendly and economic geopolymer concrete (GPC) was produced as an alternative to cementbased concrete. It is possible to substitute basalt and marble dust in specifc proportions instead of fy ash as a binder material
in GPC production. The GPC samples were obtained by replacing 25%, 50%, and 75% fy ash with waste basalt and marble
powder. Moreover, some of them were only produced from fy ash, basalt, and marble powder. As a result of the study, the
average strength of the samples made with only fy ash was 30 MPa, while the average strength of the samples with 25%
basalt and marble powder was 31 MPa. While adding 25% basalt and marble powder provides the highest value in compressive strength, it is seen that the basalt powder provides 15% better compressive strength with the addition of 50%. In GPCs
made with only marble and basalt powder, basalt powder has a 26% superiority. In addition, there are changes in the ductility
and energy absorption capacity of GPC due to the increase in both basalt and marble waste. While the ductility was 2.85
in the sample obtained with a mixture of 50% basalt and marble powder, it was 1 in the sample with 25% basalt. Samples
with high compressive strength generally resulted in brittle fractures. Basalt and marble wastes promise an excellent future
to improve the fragile structure, which is the negative aspect of GPC. In addition, values such as slump, elasticity, and unit
strain results show that the mechanical properties of the GPC with 25% waste basalt and marble powder additives instead
of fy ash are at the desired level or even better