CORROSION PROMOTING ACTION OF ALKALI AND ALKALINE EARTH THIOCYANATES IN CONCRETE ADMIXTURES

UNTERSUCHUNG DER KORROSIONSFOERDERNDEN WIRKUNG VON ALKALI- UND ERDALKALITHIOCYANATEN IN BETONZUSATZMITTELN

THE AIM IS TO CLARIFY THE EFFECTS OF ALKALI AND ALKALINE EARTH THIOCYANATES IN CONCRETE ADMIXTURES ON THE PROCESS OF CORROSION. DURING THE SUPERVISION OF CONCRETE ADMIXTURES IT WAS OBSERVED DURING ELECTRO-CHEMICAL TESTING THAT ALKALI AND/OR ALKALINE EARTH THIOCYANATES HAD A CORROSION-PROMOTING ACTION. THE AIM OF THE PROJECT IS TO ESTABLISH WHETHER IT IS NECESSARY TO SPECIFY A MAXIMUM PERMITTED CONTENT OF THESE CHEMICALS IN THE ADMIXTURES, IN THE SAME WAY AS FOR HALOGENIDES. ELECTRO-CHEMICAL STUDIES ARE TO BE MADE OF ALKALI AND ALKALINE EARTH THIOCYANATES AND COMPARED WITH SIMILAR STUDIES ON CALCIUM CHLORIDE. EXPOSURE TESTS OF CARBONATED AND NON-CARBONATED SAMPLES UNDER PRACTICAL CONDITIONS ARE INTENDED TO VERIFY THE RESULTS OF THE ELECTROCHEMICAL TESTS.

Language

• German

Project

• Status: Active
• Sponsor Organizations:

  INSTITUT FUER BAUTECHNIK (INSTITUTE OF CONSTRUCTION TECHNIQUES)

  REICHPIETSCHUFER 72-76
  BERLIN,   DEUTSCHLAND BR  D-1000
• Project Managers:

  Eichler, W

  MANNS, W

• Performing Organizations:

  STUTTGART UNIV. (TH), AMTLICHE FORSCHUNGS- UND MATERIALPRUEFUNGSANSTALT FUER DAS BAUWESEN (OTTO-GRAF-INST.) (TECHNICAL UNIVERSITY OF STUTTGART, OFFICIAL RESEARCH AND TESTING LABORATORY FOR BUILDING MATERIALS (OTTO-GRAF-INSTITUTE))

  PFAFFENWALDRING 4
  STUTTGART,   DEUTSCHLAND BR  D-7000
• Start Date: 19780111
• Expected Completion Date: 19790100
• Actual Completion Date: 0
• Source Data: ITRD D701823

Subject/Index Terms

• TRT Terms: Admixtures; Alkali; Corrosion; Halides; Reinforced concrete; Reinforcing materials; Research projects; Tests
• ITRD Terms: 4736: Admixture; 7353: Alkali; 5252: Corrosion; 7314: Halide; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 8557: Research project; 6255: Test
• Subject Areas: Research; I32: Concrete;

Filing Info

• Accession Number: 01294446
• Record Type: Research project
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• Files: ITRD
• Created Date: Nov 21 2010 4:35AM