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Abstract
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| Despite durability strategies included in the different regulations, deterioration of reinforced concrete structures prior to the lifetime for which they have been projected is a common problem in construction [1-3]. Making it necessary to know the damage origin in order to determine the more appropriate repair methods, as well as to ensure the durability of those repairs [4,5]. The objective of this work is to compare the behavior of sections of mixed repair concrete-mortar made with Portland cement mortars and organic base mortar modified with polymers, subjected to compression or bending loads, in order to assess the best options of repair for each case. To be tested to compression, cubic specimens were manufactured with different repair concrete-mortar proportions, with the materials placed both in series and in parallel. In addition, four concrete reinforced beams, which had previously been tested to bending until fracture, were repaired and tested to bending with different amounts and types of Steel (Figure 1). From the results analysis, it can be concluded that mixed systems - polymer-modified concrete mortar subjected to compression (Figure 2) can withstand greater loads than the repair Portland cement mortar. In elements subjected to bending, the repaired beams are able to achieve the initial fracture strength of the beams, or even higher. (Table 1). Therefore, repairing deteriorated concrete structures using repair mortars is a good alternative, especially in structural elements subjected to bending, and performed using Portland cement mortars. In structures subject to compression, it is better to use repair mortars modified with polymers which increase the ductility when the repair mortar is located in series regarding the load. | |
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International
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Si |
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Congress
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CITE 2018 |
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960 |
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Place
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ETSEM, UPM |
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Reviewers
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Si |
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ISBN/ISSN
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978-84-1639-771-6 |
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Start Date
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07/03/2018 |
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End Date
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09/03/2018 |
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From page
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35 |
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To page
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35 |
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3er Congreso Internacional de Innovación Tecnológica en Edificación. CITE 2018 |