MSCR analysis of bitumenous mixture of bitumen penetration grade 70/100 and rubber 15%
Rita Bērziņa, Aina Bernava, Remo Merijs-Meri

Multiple Stress Creep Recovery (MSCR) test of bituminous mixture of bitumenous mixture bitumen penetration grade 70/100 with rubber 15% was done using Test Dynamic Shear Rheometer (DSR) Anton Paar RheoCompass™ equipment, according AASHTO T 350-14 Standard Method at 58°C temperature and the test was repeated the next day. This test method covers the determination of percent recovery and no recoverable creep compliance of asphalt binders by means of the Multiple Stress Creep Recovery (MSCR) test. The MSCR test is performed at 58 ° C; the two measurements were taken on the same day with repeated measurements immediately after the first. 60 cycles per stress level: shear stress loading 0.1 kPa and 3.2 kPa for 1- second loading and 9‐second rest period were applayed. The percent recovery value is intended to provide a means for determining the elastic response and stress dependence of modified and unmodified asphalt binders. First test Average percent recovery Load level 0.1 kPa R_0.1 = 84.59 % Load level 3.2 kPa R_3.2 = 46.66 % Percent difference of recovery Load levels 0.1 kPa and 3.2 kPa R_diff = 44.84 % Average non-recoverable creep compliance Load level 0.1 kPa J_nr(0.1) = 0.0477 1/kPa Load level 3.2 kPa J_nr(3.2) = 0.2397 1/kPa Percent difference of non-recoverable creep compliance Load levels 0.1 kPa and 3.2 kPa J_nr_diff = 402.47 % FAILED at 58.00 °C according to AASHTO M 332-14. Second test Average percent recovery Load level 0.1 kPa R_0.1 = 84.88 % Load level 3.2 kPa R_3.2 = 47.50 % Percent difference of recovery Load levels 0.1 kPa and 3.2 kPa R_diff = 44.04 % Average non-recoverable creep compliance Load level 0.1 kPa J_nr(0.1) = 0.0471 1/kPa Load level 3.2 kPa J_nr(3.2) = 0.2356 1/kPa Percent difference of non-recoverable creep compliance Load levels 0.1 kPa and 3.2 kPa J_nr_diff = 400.40 % FAILED at 58.00 °C according to AASHTO M 332-14.


Pieteikuma datums
19.02.2021.
Atslēgas vārdi
Rheologycal properties, Multiple Stress Creep Recovery Test, Bituminous mixture
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