Development of sustained release complex salt filler for asphalt pavement included salt

In order to domesticate the sustained release complex salt filler applied in the pavement included salt, the carrier of sustained release complex salt filler and its production process, including the hydrophobic treatment agent and their composition proportion were studied by the water permeability test, dissolution test and chloride determination test. The composition of the sustained release complex salt filler, with function of deicing and snow removal, was determined. It contains carrier C, NaCl, modified polysiloxane A and ethyl alcohol. The proportions of them are 4g:19g:3mL:30mL. Meanwhile the producing technology was as follows: the carrier C was put into the supersaturated NaCl solution and stirred under 60°C until the mixture became pasty, then dried under 135°C; after gridded, the powders were processed with water repellent; dried under 135°C and gridded. It is verified that the pavement with this sustained release complex salt filler has good deicing and snow removal effect.