1921, Matthew B. Kendrick, "Paving Material and Process of Making Same," Specification of Letters Patent, United States Patent Office, nbr. 1,371,032, The improved surfacing material, by virtue of the well-known properties of salt incorporated therein, prevents the accumulation of ice or the solidification of moisture upon the pavement, the salineness of the sand in the composition or material having a tendency directly to dissolve or melt ice on the pavement.
Source: wiktionary