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PIARC (World Road Association), founded in 1909 and comprising 125 member governments from all over the world, is the global forum for exchange of knowledge and experience on roads, road transport policies and practices. With consultative status to the Economic and Social Council of the United Nations, the Association is contributing to a stable and sustainable global development of the road and transport sector.

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Term of the Road Dictionary

stiffening power

Language : PIARC Road Dictionary / English
Theme : Roads Materials Soils and Aggregates
Definition : Difference between the ring-and-ball softening point of a mastic composed of 60 % of fines being tested along with 40 % of pen. 50/70 bitumen and the ring-and-ball softening point of the said bitumen.

versteifende Wirkung

Language : PIARC Road Dictionary / German
Theme : Straßen Baustoffe Erdreich und Gesteinskörnung
Definition : Die Differenz zwischen dem Ring-und-Kugel-Erweichungspunkt eines Mastix, aus 60 % Feinteilen und 40 % Bitumen 50/70 und dem Ring-und-Kugel Erweichungspunkt desselben Bitumens.