Trass

Trass

Trass is the local name of a volcanic tuff occurring in the Eifel, where it is worked for hydraulic mortar. It is a grey or cream-coloured fragmental rock, largely composed of pumiceous dust, and may be regarded as a trachytic tuff. It much resembles the Italian pozzolana and is applied to like purposes. Mixed with lime and sand, or with Portland cement, it is extensively employed for hydraulic work, especially in the Netherlands; while the compact varieties have been used as a building material and as a fire-stone in ovens. Trass was formerly worked extensively in the Brohl valley and is now obtained from the valley of the Nette, near Andernach.

References

*1911


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  • Trass — ist der lokale Name für ein natürliches Puzzolan, das als Zusatzstoff bestimmten Zementen beigemischt wird. Im Raum Bergisch Gladbach verstand man unter Trass die Braunkohle, die man im Bensberger Erzrevier förderte.[1] Inhaltsverzeichnis 1… …   Deutsch Wikipedia

  • trass — (constr.) s. n. Trimis de siveco, 10.08.2004. Sursa: Dicţionar ortografic  TRASS s.n. v. tras. Trimis de LauraGellner, 13.09.2007. Sursa: DN  TRASS s. n. material prin măcinarea fină a unei varietăţi de tuf vulcanic, în mortaruri. (< …   Dicționar Român

  • Trass — Trass, n. [D. tras or Gr. trass, probably fr. It. terrazzo terrace. See {Terrace}.] (Geol.) A white to gray volcanic tufa, formed of decomposed trachytic cinders; sometimes used as a cement. Hence, a coarse sort of plaster or mortar, durable in… …   The Collaborative International Dictionary of English

  • trass — ⇒TRASS, subst. masc. GÉOL. Tuf volcanique entrant dans la préparation des mortiers hydrauliques. Dans le trass et la pouzzolane, la silice est dans un état particulier qui permet son union à la chaux (BOURDE, Trav. publ., 1928, p. 153).… …   Encyclopédie Universelle

  • trass — [tras] n. 〚Ger < Du tras < earlier terras < MFr terrace: see TERRACE〛 a volcanic rock, powdered and used in making a hydraulic cement * * * trass (trăs) n. A light colored tuff used in hydraulic cement.   [Dutch tras, short for obsolete …   Universalium

  • trass — [tras] n. [Ger < Du tras < earlier terras < MFr terrace: see TERRACE] a volcanic rock, powdered and used in making a hydraulic cement …   English World dictionary

  • Trass — Recorded in many forms including Trace, Traice, Trase, Trass, Tree, Treece, Trees, and Trosse, this is an English surname. It is topographical and describes a person who dwelt by a particular tree. In general as the countryside in ancient times… …   Surnames reference

  • Trass — Trạss 〈m. 1〉 verfestigter Bimssteintuff, der feingemahlen als hydraul. Zuschlag auf Trasszement od. Beton verwendet wird [<ital. terrazzo „Terrasse, Altan“] * * * Trạss [niederl. tras, terras u. frz. terrasse = Terrasse (lat. terra = Erde)] …   Universal-Lexikon

  • trass — n. (also tarras) a light coloured tuff used as cement material. Etymology: Du. trass, earlier terras, tiras f. Rmc: cf. TERRACE …   Useful english dictionary

  • trass — (tra s ) s. m. Espèce de tuf volcanique …   Dictionnaire de la Langue Française d'Émile Littré

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