THE WILHELMSHAVEN TESTS CONCERNING THE BEHAVIOR OF CONCRETE AND CEMENT IN SEA-WATER, FROM THE VIEWPOINT OF USING TRASS

IN ITS REPORT NO. 102 (1950 AND 1955) THE DEUTSCHER AUSSCHUSS FUR STAHLBETON PUBLISHED RESULTS OF STORAGE TESTS ON CONCRETE SPECIMENS IN SEA-WATER. THESE RESULTS ARE AT VARIANCE WITH PRACTICAL EXPERIENCE MORE PARTICULARLY WITH REGARD TO CONCRETE CONTAINING AN ADMIXTURE OF TRASS. A CRITICAL EXAMINATION OF THE TEST CONDITIONS SHOWS THAT THE WILHELMHAVEN CONDITIONS OF MANUFACTURE AND STORAGE WERE CHOSEN WHICH CAN ONLY BE REGARDED AS UNREALISTIC. THE CONCRETE CUBES WERE IMMERSED IN SEA-WATER WITH A TEMPERATURE OF ONLY 2 TO 6C WHEN THEY WERE NO MORE THAN 48 HOURS OLD. BESIDES, THE CUBES WERE FULLY EXPOSED TO THE ACTION OF TIDAL CURRENTS. HENCE IT IS VERY LIKELY THAT THE INSUFFICIENTLY HARDENED CUBES WERE AT FIRST SEVERELY ATTACKED BY EROSION DUE TO WAVE ACTION AND WERE PERHAPS FURTHER PARTLY DESTROYED BY THE ACTION OF FROST. THE CONFLICTING EVIDENCE OF THE WILHELMSHAVEN TESTS AS COMPARED WITH ACTUAL PRACTICE CAN BE ATTRIBUTED ONLY TO THE DIFFERENT CHARACTER OF THE MECHANICAL ATTACK BY THE SEA-WATER AND TO DIFFERENT PHYSICAL CONSTITUTION OF THE CONCRETE AS IS MANIFESTED IN REPORT NO. 134 (1959) OF THE DEITSCHER AUSSCHUSS FUR STAHLBETON. IN REPORT NO. 168 (1965) OF THE DEITSCHER AUSSCHUSS FUR STAHLBETON ARE PUBLISHED THE FINDINGS OF A REASSESSMENT OF THE WILHELMSHAVEN TEST RESULTS. AS COMPARED WITH THE CONCLUSIONS PRESENTED IN REPORT NO. 102, THIS REASSESSMENT ARRIVES AT A FUNDAMENTALLY DIFFERENT JUDGMENT OF THE TRASS ADMIXTURE. WHEN THE LOSSES OF MATERIAL FROM THE CONCRETE TEST CUBES ARE REFERRED TO THE PORE SPACE IN THE HARDENED CEMENT PASTE, IT EMERGES AS THE MOST SIGNIFICANT RESULT THAT THE PORTLAND SLAG CEMENTS WERE IMPROVED BY THE ADDITION OF TRASS, DESPITE THE UNFAVOURABLE CONDITIONS OF MANUFACTURE AND STORAGE OF THE SPECIMENS. /AUTHOR/

• Supplemental Notes:
  • Vol 57, No 3, PP 134-137
• Authors:
  • Kremser, H
• Publication Date: 1968-3

Media Info

• Serial:
  • Zement-Kalk-Gips

Subject/Index Terms

• TRT Terms: Admixtures; Cement; Concrete; Erosion; Frost action; Handling and storage; Portland cement; Pozzolan; Seawater; Storage facilities; Test procedures; Testing; Wave motion
• Old TRIS Terms: Frost action effects; Test results; Wave action
• Subject Areas: Freight Transportation; Highways; Materials; Terminals and Facilities;

Filing Info

• Accession Number: 00212622
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 15 1994 12:00AM