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       A recent study optimized some of the real-world properties of methyl methacrylate (MMA)-based cold plastic road surfaces.
       For this purpose, as a first step, the influence of the initiator content benzoyl peroxide (BPO) on the polymerization of MMA-based road surfaces was assessed. The tack-free time, pendulum hardness, tensile strength and color difference (ΔEw) of samples containing different wt% BPO (0.5, 1.0, 1.5 and 2.0) were determined before and after exposure to accelerated weathering conditions (AWC).
       In the second stage, a mixed design of experiments (MED) was used to optimize the MMA-based pavement formulation. Consider the amounts of MMA resin, chlorinated paraffins (plasticizers), and silica fillers with different average particle sizes as variables in the pavement formulation. Viscosity, reflectance, color difference (ΔEw) before and after AWC exposure, skid resistance, and stain resistance were selected as the practical properties and responses in the MED. The results show that low doses of BPO initiator have little effect on the curing rate of the pavement samples. In addition, high BPO levels may lead to a decrease in the mechanical properties of the pavements due to the presence of plasticizers and unreacted BPO compounds in the polymer network. The results also confirmed that MED is an effective method for optimizing MMA-based road marking pavements to achieve a balance between skid resistance and stain resistance.