Journal
CEMENT & CONCRETE COMPOSITES
Volume 47, Issue -, Pages 32-40Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2013.10.008
Keywords
Durability; Freeze-thaw; Frost; Scaling; Internal deterioration; Carbonation; Chloride; Coupled/interacted deterioration; Service life; Field testing
Funding
- TEKES (The Finnish Funding Agency for Technology and Innovation)
- Finnish Transport Agency and members of the Finnish concrete and cement industry
- Aalto University
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Concrete performance is traditionally based on assessing the effect of a single degradation mechanism. In the field, however, concrete is simultaneously affected by degradation mechanisms, possibly with a synergetic effect on deterioration. This paper presents the results of a Finnish research project assessing coupled deterioration mechanisms including frost attack, carbonation and chloride penetration. Research was composed of an extensive laboratory testing regime, in parallel to the exposure of several concrete specimens at field stations. Testing took into account the effects of ageing and repeated exposure cycles to different conditions. More than 60 concrete mixtures were evaluated with varying binder types and air contents. Testing results together with local weather data serve as a basis for modelling and development of service life assessment tools. The results show the synergetic effect on concrete deterioration of coupled deterioration and quantitatively support that a holistic approach should be adopted for predicting deterioration. (C) 2013 Elsevier Ltd. All rights reserved.
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