Akademik Veri Yönetim Sistemi
European Journal of Engineering and Natural Sciences (EJENS), cilt.8, sa.1, ss.74-82, 2023 (Hakemli Dergi)
During the production
process of mortar many of
additives can be used jointly to obtain efficient workability
properties. In this situation strength
of mortar depends on the correct ratio
of admixtures. This study focuses on
analysing of mortar samples that have three different doses of sodium
lignosulphonate based plasticizer (%1-1,5-3)
and calcium nitrate based
set accelerator (%0,5-1-2)
admixture combinations. The water-cement
ratio is selected as 0.50 for the mortar production. Various effects in the strength
and durability are investigated by experimental methods. Scanning electron microscope (SEM) images
were obtained at the range of magnification 500x to 4000x for observations. In the investigation unit weight, ultrasonic
pulse velocity, compressive strength, setting time tests and microstructure
analysis tests were performed in three different dosage mixtures and the
obtained data were evaluated. As a
result of the tests carried out, the use of the admixtures in different dosages
caused decreasement in compressive strength maximum 7,27 MPa in 28 day
samples. It has been observed that %1
plasticizer and %0,5 accelerator combination which has the minimum doses reach
the highest compressive strength for 28 days (39,8 MPa). Therefore, as a result
the coexistence of additives must be sensitively controlled and the required
dosage adjustments must be made in production.