The influence of grain size composition on the stiffness modulus of mineral-cement-emulsion mixtures (MCEM) with the rubber powder addition

Abstract

The aim of the work is to determine the influence of the grain composition of MCEM modified with rubber powder on their stiffness modulus with the same amount of binders added. The mixtures were made in accordance with the instruction [6] using various reclaimed asphalt materials containing 5.6% and 10% of asphalt in the amount of 45% and 51% (m/m), respectively, grading aggregate in the amount of 53% and 47%, rubber powder 0/1 mm in an amount of 2% (m/m), CEM I 42.5 cement in an amount of 4% (m/m) and asphalt emulsion in an amount of 2% (m/m). The optimal moisture of mixtures determined by the Proctor test was 6% and 7%. Laboratory tests of the stiffness modulus were performed using the 4-point bending beam method at temperatures of 0°C, 20°C and 40°C in the case of coarse-grained mixtures and 10°C, 20°C and 40°C in the case of medium-grained mixtures at a given constant strain of 50 µm/m.