The use of durable coloured surface treatment can be one of the best cost reduction strategies for road maintenance. The purpose of this study was to investigate the feasibility of applying natural iron oxide red pigments in a slurry seal mix design in order to change the colour of this type of asphalt and evaluate its performance. In this regard, first, the physical and chemical properties of the rock and pigment materials were evaluated. Then, 4 different mixtures containing 0, 3, 6, and 9% pigment as filler replacement by dry weight of total aggregate with three different levels of bitumen emulsion were used. The design results indicated that the mixture containing 9% of the pigment had the best performance among the mixtures. According to the results, red iron oxide pigment would improve adhesion of bitumen emulsion to rock aggregate, abrasion resistance, and also vertical deformation.

使用耐用的彩色表面处理可能是降低道路维护成本的最佳策略之一。本研究的目的是研究在浆料密封混合设计中应用天然氧化铁红颜料以改变此类沥青的颜色并评估其性能的可行性。对此，首先对岩石和颜料材料的物理和化学性质进行了评估。然后，使用含有 0、3、6 和 9% 颜料的 4 种不同混合物作为填料，用三种不同水平的沥青乳液代替总骨料的干重。设计结果表明，含有9%颜料的混合物在混合物中性能最好。结果表明，氧化铁红颜料可以提高沥青乳液对岩石骨料的附着力，