Abstract
In this paper, based on the thermosetting properties, bonding performance, high-temperature water damage resistance, and aging resistance properties of epoxy-emulsified asphalt, the best formulation of epoxy emulsified asphalt as a skid resistance fog sealing asphalt is studied. Through accelerated wheel wear and other tests, the effects of the ratio of the amount of skid resistance particles to the amount of epoxy emulsified asphalt, the total amount of skid resistance fog seal asphalt, and the construction process on the skid resistance durability of the skid resistance fog seal were studied. The results show that the epoxy emulsified asphalt formula code A80 (E2) (emulsified asphalt : water-based epoxy = 80 : 20) is the best formula; when the proportion of emery and epoxy emulsified asphalt is 1 : 1, the British Pendulum Number (BPN) reduction rate of the skid resistance fog seal-test piece worn 100,000 times was 27.4%. Compared with the same period, the reduction rate was reduced by 4.6% on average, with the smallest mass loss rate and the best skid resistance durability. When the total amount of skid resistance fog seal asphalt is 1.2 kg/m2, the BPN reduction rate of the skid resistance fog seal specimen worn 100,000 times was 27.4%, which is an average reduction of 5.8% over the same period, and the mass loss rate is the smallest, and the skid resistance durability optimal. When using the premixed process, the BPN of the specimen was reduced by 13.2% after abrasion of 100,000 times. Compared with the “one asphalt and one sand” and “double asphalt and one sand” molded specimens, the mass loss rate was reduced by 15.0%, 4eU&7.2%, showing the best skid resistance performance. The results can provide guidance for the design and construction of AC-13 and other pavement skid resistance fog seals.
Highlights
Skid resistance fog seal layers are composed of diluted liquid asphalt, fine aggregate, and catalyst. e layers can penetrate the gaps of aggregates and flow into pores, thereby restoring the adhesion of asphalt on the road surface, filling tiny cracks and voids, and preventing the road surface from underwater seeping [1]
Yuan and Center [19] have shown that compared with traditional antifog sealant coatings, antislip antifog sealant coatings can improve the antislip performance of pavement and improve the antislip performance of pavement. en, according to the highway application case, the raw material requirements of the antiskid mist seal layer and the quality control standards of the construction process are summarized
Erefore, follow-up tests are screened in the range of Ai (Ej) {i 60, 70, 80, 90; j 2, 3, 4}, combined with the bonding and aging performance of the fog sealing asphalt. e performance of high-temperature water damage resistance comprehensively determines the best formula of fog sealing asphalt
Summary
Skid resistance fog seal layers ( known as sand fog seal layers) are composed of diluted liquid asphalt (emulsified asphalt or modified emulsified asphalt), fine aggregate, and catalyst. e layers can penetrate the gaps of aggregates and flow into pores, thereby restoring the adhesion of asphalt on the road surface, filling tiny cracks and voids, and preventing the road surface from underwater seeping [1]. Scholars globally have studied the two composition materials (skid resistance particles and fog sealing asphalt) and their influence on the performance of the skid resistance fog seal layer. Research by Hu et al [9] showed that the water-based epoxy resin in the water-based epoxy asphalt modified emulsion (WEB) can significantly improve the skid resistance and durability of the fog-sealed pavement. In a study on skid resistance particles, Estakhri and Agarwal [14] showed that spraying fine sand in the fog seal layer could prevent the rapid decline in the pavement’s skid resistance performance in the short term. For the construction technology of the skid resistance fog seal layer, research by Li et al [18] showed that simultaneous spraying of 0.3 kg/m2–0.35 kg/m2 solvent-based emulsified asphalt and 0.25 kg/m2 emery can improve the skid resistance performance. The superiority of the recommended skid resistance fog sealing asphalt is verified by the microscopic analysis of the epoxy emulsified asphalt solidification and the BPN abrasion law and the mass loss rate of different asphalt skid resistance fog sealing asphalt samples
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