“…Among them, the ASTM C 1260 [17], commonly known as accelerated mortar bar test (AMBT), is most widely accepted method for assessing ASR [12,18] because of its short test duration (14 days after submerging the specimens in alkali solution) due to the high concentration of alkaline solution (1.0 N NaOH) and an elevated temperature of 80°C. Several parameters of ASTM C 1260, such as solution concentration [15,[19][20][21][22][23][24], cement alkali [15,19,22], water-to-cement ratio [18,19,22], aggregate size [25][26][27][28] aggregate's angularity [28] and test duration [16,[18][19][20][21][22][23][24]29] have an influence on the measured mortar expansion. Previous research studies [19,22,23,30] revealed that the solution type and concentration of ASTM C 1260 control the expansion characteristics.…”