Abstract
The skid resistance of asphalt pavements is the key to ensuring traffic safety. Silicone resin is often used as a maintenance material for fog seal because of its waterproof performance and weather resistance, but it is rarely mentioned in the field of skid resistance. In this paper, a high friction surface treatment with silicone resin (HFST-S) was prepared by adding skid-resistance aggregates to improve the skid resistance of pavements. Firstly, the curing time, chemical composition, group content, and hydrophobic performance of silicone resin were studied. Then the morphology characteristics and mechanical performance of skid-resistance aggregates were investigated. Finally, the type and particle size of skid-resistance aggregates, the ratio of silicone resin to skid-resistance aggregates (RSA), and silicone resin dosage were optimized by laboratory tests. The results indicate that silicone resin cured basically at 60 °C for 24 h and Si-OH content decreased during curing. The cured silicone resin was mainly composed of C, O, and Si elements and had remarkable hydrophobicity. In addition, emery sands had richer angularity and better mechanical performance than basalt sands. Therefore, the HFST-S prepared by silicone resin and emery sands has outstanding waterproof performance and skid resistance. The optimum formula of HFST-S was determined as 0.60 – 1.18 mm particle size of emery sands, 40:60 of RSA, and 800 g/m2 of silicone resin.
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