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Pro109-1

EVALUATION OF CONCRETE’S RESISTANCE TO PHYSICAL SULFATE SALT ATTACK



Author(s): Semion Zhutovsky, R. Douglas Hooton
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 122-131
Total Pages: 10
Language : English


Abstract: Physical sulfate salt attack (PSA) is one of the most severe and rapid deterioration
mechanisms that can take place in concrete. Yet there is no standard method for evaluation of
concrete resistance to PSA. Testing of concrete’s resistance to PSA has two main aspects –
exposure conditions and evaluation of deterioration. Evaluation of concrete’s resistance to
PSA often requires a long time, which is inappropriate for evaluation of concrete mixtures for
a construction project. Many studies report sulfate resistance based on subjective visual
ratings, which is inadequate as a durability design criterion. The objective of this research is
to identify exposure conditions and deterioration evaluation methods suitable for standard
testing that can be used for rapid comparison of mixture compositions, durability design, and
analysis of life cycle cost. Various methods for assessment of deterioration were applied using
selected exposure. It was found that 100 thermal cycles between 5 and 30 °C immersed in
30% sodium sulfate solution were sufficient to assess the resistance of a range of mortar
mixtures. The most suitable techniques for evaluation of deterioration rate was mass loss,
while fundamental resonance frequency and ultrasonic pulse velocity were found to be
unsuitable.


Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00


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