Preparation and Road Performance of Solvent-Based Cold Patch Asphalt Mixture

The cold patch asphalt mixtures (CPAMs) have been manufactured by mixing the cold patch asphalt liquid (CPAL) with type LB-13 mineral mixture. The workability, Marshall stability, Freeze–thaw splitting strength and cohesion of three types of CPAMs were tested in the laboratory. The potholes were repaired using CPAMs on several sites in S101 provincial highway at Feidong. The CPAMs were sampled to measure the bulk density and Marshall stability, and the volume of air voids (VV) of those specimens was calculated. The results indicated that the Brookfield viscosity of CPAL affected the workability of the CPAMs. The Marshall stability of three types of CPAMs was only 3.07, 3.80 and 4.28 kN, respectively. However, the CPAMs had better water stability and met the requirements of hot mix asphalt (HMA) in low-rain regions referring to JTG F40-2004. The VV decreased and Marshall stability increased with the action of the secondary compaction and the volatilization of additives. Beyond 3 months, the Marshall stability of the compacted mixtures tends to be stable. The Marshall stability of type A and B CPAMs changed from 5 to 6 kN, while that of type C CPAM varied between 4 and 5 kN. The products met the requirements of dense-graded HMA on the low-grade highway. Overall, the prepared CPAMs can be used to repair pavement potholes from the perspective of material properties and molding intensity.