Analysis of degradation behavior of leached concrete

Author(s): Bei Huang, Chunxiang Qian
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 857 - 865
Total Pages: 8
Language: English

This paper deals with chemical and mechanical degradation behaviors of leached concrete in NH₄NO₃ solution. The leaching degradation (D) was measured by the following testing methods: phenolphthalein indicator, ultrasonic testing, pH value in pores and X-ray microtomography. The stress-strain relationships of leached concrete with different leaching degradations were investigated experimental. The studying results illustrated that D tested by the above four methods were all show the better linear relationship of the decrease of compressive strength of the leached concrete. Experimental results proved that ultrasonic testing was a useful non-destructive method to characterize the degradation depth of leached concrete. Although, the X-ray microtomography analysis represented the higher degradation, but this powerful non-destructive method could show the porosity changed in the interfacial transition zone (ITZ) which covered the shortage of MIP analysis. The analytical regression for the stress-strain relationship of leached concrete was given, which fit to the experimental data well.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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