WEATHER RESISTANCE OF CONCRETE COMPARED WITH NATURAL ROCKS
WITTERUNGSBESTAENDIGKEIT VON BETON IM VERGLEICH MIT NATURSTEINEN
A SIGNIFICANT PART OF THE STUDY CONSISTED IN THE EXAMINATION OF CONCRETE SLABS WHICH HAD BEEN EXPOSED TO WEATHERING FOR SEVERAL YEARS. COMPARATIVE STUDIES WERE MADE ON SLABS OF NATURAL STONE USED IN BUILDINGS. THE SLABS TESTED HAD BEEN SUBJECTED TO OPEN-AIR WEATHERING FOR APPROXIMATELY 30 YEARS AND HAD BEEN STANDING IN WATER ABOUT 35 CM DEEP, AND WERE MADE OF 17 DIFFERENT CONCRETE MIXES. THE COMPRESSIVE STRENGTH OF THE CONCRETE, DEGREE OF CARBONATION AND THE CONDITION OF THE REINFORCING BARS WERE ESTABLISHED. CONCRETES WITH CEMENT CONTENTS OF 200 AND 300 KG PER CUBIC METRE HAD WATER CEMENT VALUES OF 1.29 TO 0.50. IN SLABS MADE OF LOWER QUALITY CONCRETE ONLY THE CEMENT SKIN OR THE FINE MORTAR TO A DEPTH OF 3 MM AT THE MOST HAD BEEN WORN AWAY BY WEATHERING. ORIGINAL COMPRESSIVE STRENGTHS WHICH WERE BETWEEN 73 AND 498 KP PER CUBIC CM HAD ALWAYS RISEN CONSIDERABLY - THEY WERE BETWEEN 267 AND 849 KP PER CUBIC CM. NO CORROSION WAS FOUND AND, WITH A FEW EXCEPTIONS, CARBONATION WAS ONLY A FEW MM DEEP.
Language
- German
Project
- Status: Completed
-
Contract Numbers:
ITRD V 1
-
Sponsor Organizations:
DEUTSCHER AUSSCHUSS FUER STAHLBETON (GERMAN REINFORCED CONCRETE COMMITTEE)
BUNDESALLEE 216-218
BERLIN, DEUTSCHLAND BR D-10719 -
Project Managers:
-,
-
Performing Organizations:
STUTTGART UNIV. (TH), AMTLICHE FORSCHUNGS- UND MATERIALPRUEFUNGSANSTALT FUER DAS BAUWESEN (OTTO-GRAF-INST.) (STUTTGART TECHNICAL UNIV., OFFICIAL RESEARCH AND TESTING LAB. FOR BUILDING MATERIALS (OTTO-GRAF-INST.))
PFAFFENWALDRING 4
STUTTGART, Germany D-7000 - Start Date: 19410000
- Expected Completion Date: 0
- Actual Completion Date: 19760000
- Source Data: ITRD D701272
Subject/Index Terms
- TRT Terms: Carbonates; Concrete; Durability; Pressure; Reinforced concrete; Research projects; Rocks; Slabs; Strength of materials; Tests; Weather resistance
- ITRD Terms: 7312: Carbonate; 4755: Concrete; 5910: Durability; 5412: Pressure; 4794: Reinforced concrete; 8557: Research project; 4154: Rock; 3491: Slab; 5544: Strength (mater); 6255: Test; 5940: Weather resistance; WEST GERMANY
- Subject Areas: I32: Concrete;
Filing Info
- Accession Number: 01304803
- Record Type: Research project
- Source Agency: Bundesanstalt für Straßenwesen (BASt)
- Contract Numbers: ITRD V 1
- Files: ITRD
- Created Date: Nov 21 2010 10:05AM