Abstract: The increased wear of asphaltic concrete and gussasphalt during the winter months, caused by the action of de-icing salts and studded tires, has led to the creation of a new type of asphalt surfacing called Aspiphalt. Studded tires mainly affect the mortar in the surfacing, causing a loss of mortar and eventual loosening of the chippings; this process can be prevented by a denser structure, higher bitumen content, and a higher proportion of chippings; these three criteria formed the basis for the development of aspiphalt. With a proportion of chippings of about 70 percent, the binder content of 7.0 - 7.5 percent seems too high. The fact that this amount of binder can be used in the mixture without any adverse consequences is due to the addition of a polymer which has a favorable effect on the flow properties and adhesion strength of the bitumen. A number of practical tests have confirmed the favorable behavior of aspiphalt, particularly its skidding resistance. /TRRL/
Publication Year: 1971
Publication Date: 1971-01-01
Language: en
Type: article
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