Study on properties and mechanisms of luminescent cement-based pavement materials with super-hydrophobic function

In this study, super-hydrophobic and luminescent cement pavement materials (SLCPM) were prepared, and the effects of the long afterglow luminescent materials and hydrophobic materials on luminescent properties and hydrophobicity of SLCPM were investigated. The results indicated that the mechanical performance of SLCPM was improved with the addition of luminescent powder (LP), but the opposite was true for the addition of reflective powder (RP). The superior luminescent properties of SLCPM could be found when the content of the LP was about 25% and the optimum content of the RP was maintained at 10%. The initial brightness could reach 96.56% of the maximum initial brightness after lighting for 30 min, which have more stable long afterglow performance and higher identification. The super hydrophobic surface coating has excellent stability, self-cleaning performance and long-term stability, which can effectively reduce the liquid infiltration. After the test was finished, the surface contact angle and rolling angle could still reach 152.2 degrees and 5.4 degrees, respectively. It is concluded that doping appropriate LP can not only optimize the distribution of hydration products, but also improve compactness and initial brightness of SLCPM; while doping a large amount of RP can obviously reduce its strength due to its reaction with hydration products. These obtained results would provide a new thought on the design of the road pavement in low lighting environment. (C) 2018 Elsevier Ltd. All rights reserved.