High-temperature stability, water stability, and ice melting properties of salt-storage bituminous mixture AC-13

This study investigated the road performance and ice melting performance of the AC-13 bituminous mixture prepared with the equal volume replacement of mineral powder from a self-made salt-storage bitumen pavement additive. The results show that adding salt storage bitumen additive improves the bituminous mixture’s high-temperature stability and reduces the bituminous mixture’s water stability. When the replacement rates of the salt storage additive are 50%, 75%, and 100%, the Tensile Strength Ratio (TSR) decreases by 3.35%, 5.95%, and 8.11%, respectively. The dynamic stability (DS) also increases by 4.21%, 7.30%, and 5.62%, respectively. The melting ice rate and salt precipitation tests demonstrate that the salt storage bituminous mixture with a replacement rate of 100% achieves a 36% ice melting rate and 0.3% salt precipitation at -5°C, meeting the standard requirements.