Mechanical properties and direct tensile strength of waste toner foamed concrete
N. M. Alkurdi*, F. A. Mohammad, H. A. Klalib
Cement content effect on the compressive strength of FC is examined.
Effect of density and additives on FC mechanical properties is investigated.
A direct tensile test to determine the tensile strength of FC is proposed.
Direct tensile strength is compared with the indirect ones.
Modulus of elasticity and stress-strain relationship of FC is obtained.
The use of Foamed Concrete (FC) in structural elements reduces dead loads on structures and foundations, contributes to cost reduction and energy-efficient construction by reduces the structural elements size, labour and energy during transportation and construction stages. To investigate the mechanical properties of FC including compressive, tensile and flexural strengths, modulus of elasticity and the stress-strain relationship, 256 specimens classified into four different densities (1200, 1400, 1600 and 1800 kg/m3) were tested. For each concrete density, four mixes were designed including control mix and three different additives; silica fume, metakaolin and waste toner. The waste toner additive was collected from used printer cartridges. The experimental program was considered to introduce a modified direct tensile test, where splitting and flexural tests were conducted to confirm its reliability. The obtained results were quite converged, which illustrated that the tensile strength determined by the proposed model was lower than that of the Brazilian and flexural tests. The waste toner additive improved the FC compressive and tensile strengths by more than 30%. These results are promising and point to the significant potential of developing an eco-friendly lightweight concrete by replacement a percentage of cement with waste toner.
To cite this article: Alkurdi NM, Mohammad FA, Klalib HA. Mechanical properties and direct tensile strength of waste toner foamed concrete. Journal of Advanced Civil Engineering Practice and Research 2020;11:10-20.