Development of a Sulfate Resistance Performance Test for Concrete by Tensile Strength Measurements: Determination of Test Conditions

Crystals

卷:11

Anya Vollpracht¹  Thomas Matschei¹  Johannes Haufe² 

[1] Institute of Building Materials Research, RWTH Aachen University, Schinkelstraße 3, 52062 Aachen, Germany;

[2] ZERTplus Überwachungsgesellschaft mbH, Mühlenweg 11, 06749 Bitterfeld-Wolfen, Germany;

关键词: sulfate attack;    concrete;    tensile strength;    X-ray diffraction;   

DOI  :  10.3390/cryst11081001

来源: DOAJ

【 摘 要 】

Assessing the sulfate resistance of concrete is essential for the use of concrete in sulfate rich environments. A multitude of test methods exists worldwide, showing the relevance of the problem and the difficulty to find a suitable test setup. Testing the relative tensile strength of ASTM C307 concrete briquette specimens after exposure to a sulfate solution is a new direct method to assess the degree of deterioration. The aim of this study is to develop a new performance test, which considers both the chemical and physical resistance of a specific concrete mix against sulfate attack. In the experimental investigations, the binder type, storage temperature, type and concentration of sulfate solution, and concrete composition were varied, and the remaining tensile strength evaluated to define the test parameters. To gain significantly distinguishable data within nine months of storage, the use of sodium sulfate solution with 6000 mg SO₄²⁻/L at 5 °C is proposed.

【 授权许可】

Unknown