Sigma Journal of Engineering and Natural Sciences, cilt.38, sa.4, ss.2155-2168, 2020 (Diğer Kurumların Hakemli Dergileri)
This study presents an experimental investigation on the influences of gold mine tailings as a substitute for
cement. Various ratios of air-entraining and superplasticizer admixtures were used in the determined
composition of gold mine tailing-containing mortars. Several analytical variables, including setting time,
water absorption, and strength tests, were studied to establish the relationship between these added materials
and the properties of cement mortars. In addition, the compositions of 28-day–cured samples were identified
by X-ray diffraction (XRD) analysis. The results showed that when the water /binder (w/b) ratio is kept
constant at 0.5, the replacement of cement by 10% gold mine tailing showed mechanical properties similar to
those of the reference sample. The mortars prepared with 0.5% superplasticizer admixture reached the highest
compressive and flexural strength values of 64.16 MPa and 8.99 MPa, respectively. When flowability and
water absorption properties are improved by the air-entraining admixture addition, the compressive and
flexural strength decrease.
Keywords: Cement mortar, chemical admixture, gold mine tailing, industrial waste.