Información importante sobre cookies: Utilizamos cookies propias y de terceros para mejorar nuestros servicios. Si continuas navegando, consideramos que aceptas su uso. OK | Más información

Deval test

This test measures the aggregate's resistance to abrasion. In a standardised procedure, pre-set granulometric fractions of ballast or gravel are introduced into two slanted axis rotary cylinders (one of these is filled with water covering the aggregates). The cylinder rotates a set number of revolutions at a set speed and the test finishes by separating and weighing particles of less than 1,6 mm (?ms' and ?mh' values in grams) formed during the test. The dry Deval coefficient for ballast is obtained from the Ds= (2800/m) formula and the moist Deval coefficient from the Dh= (2800/m¹) formula.