EFFECT OF VIBRATIONS OF FRESH CONCRETE ON THE BEARING CAPACITY OF OVERLAPPING STRUTS
EINFLUSS VON ERSCHUETTERUNGEN VON FRISCHEM BETON AUF DIE TRAGFAEHIGKEIT VON UEBERGREIFUNGSSTOESSEN
THE STUDIES ARE INTENDED TO DETERMINE WHICH RELATIVE MOVEMENTS BETWEEN HARDENING CONCRETE AND REINFORCEMENT CAN BE ABSORBED WITHOUT DAMAGE TO THE BONDING PROPERTIES. IT IS INTENDED TO UNDERTAKE TENSILE TESTS ON OVERLAPPING STRUTS EMBEDDED IN A CONCRETE CASING. THE DIMENSIONS OF THE CASING ARE IN ACCORDANCE WITH THE OVERLAP LENGTHS SPECIFIED IN DIN 1045. TRANSVERSE MOVEMENT IS NOT EXPECTED: CONCRETE COVER IS ABOUT 5 CM ON EACH SIDE. RIBBED BARS WITH A DIAMETER OF 12 MM ARE BEING USED. THE VIBRATION ACTION IS TO BE INTRODUCED TRANSVERSELY ONTO THE EMBEDDED BARS. IT IS KNOWN FROM PREVIOUS TESTS THAT THE CRITICAL PHASE IS BETWEEN THE 2ND TO THE 6TH HOUR AFTER THE COMPACTION OR MIXING OF THE CONCRETE. IT IS THEREFORE INTENDED TO TEST SEVERAL SIMILAR SAMPLES AT VARIOUS TIMES WITHIN THIS CRITICAL PHASE BY INTRODUCING CERTAIN VIBRATIONS AND DETERMINING THEIR EFFECT ON THE DEVELOPMENT OF THE BOND. THE TENSILE TEST WILL FOLLOW AFTER 28 DAYS.
Language
- German
Project
- Status: Active
-
Contract Numbers:
ITRD V 193
-
Sponsor Organizations:
DEUTSCHER AUSSCHUSS FUER STAHLBETON (GERMAN REINFORCED CONCRETE COMMITTEE)
BUNDESALLEE 216-218
BERLIN, DEUTSCHLAND BR D-10719 -
Project Managers:
Kordina, K
-
Performing Organizations:
TECHNISCHE UNIV. BRAUNSCHWEIG, INST. FUER BAUSTOFFKUNDE UND STAHLBETONBAU (TECHNICAL UNIVERSITY OF BRUNSWICK, INSTITUTE FOR CONSTRUCTION MATERIALS AND REINFORCED CONCRETE)
BEETHOVENSTR. 52
BRAUNSCHWEIG, DEUTSCHLAND BR D-3300 - Start Date: 19780403
- Expected Completion Date: 19790000
- Actual Completion Date: 0
- Source Data: ITRD D701861
Subject/Index Terms
- TRT Terms: Adhesion; Anchorages; Concrete hardening; Fresh concrete; Reinforced concrete; Reinforcing materials; Research projects; Setting (Concrete); Tests; Vibration
- ITRD Terms: 5942: Adhesion; 3420: Anchorage; 4750: Fresh concrete; 4722: Hardening; 4794: Reinforced concrete; 3471: Reinforcement (in mater); 8557: Research project; 4723: Setting (concrete); 6255: Test; 5558: Vibration
- Subject Areas: Research; I24: Design of Bridges and Retaining Walls; I32: Concrete;
Filing Info
- Accession Number: 01294494
- Record Type: Research project
- Source Agency: Bundesanstalt für Straßenwesen (BASt)
- Contract Numbers: ITRD V 193
- Files: ITRD
- Created Date: Nov 21 2010 4:36AM