Word: asphalted
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Dates: during 1970-1979
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Liquid Latex Pavement. At Texas A. & M., Research Engineer Douglas Bynum, 35, is testing his theory that the rubber in discarded tires might give asphalt added flexibility and more resistance to cracking. Working in the university's Transportation Institute, Bynum prepared samples of asphalt combined with ground-up rubber obtained from old tires. Test results showed that the powdered rubber-used as a binding material-increases asphalt's overall cohesiveness so that it does not split when roadbeds shift slightly or sink. Bynum's findings seem to be a natural outgrowth of experiments by the rubber industry...
Best of all, Bynum says, there would be no foreseeable shortage of materials for the improved roads. Combined with asphalt, the old tires and bottles disposed of in 1970 could pave a freeway that would span the U.S. 23 times...