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Avaliação de concreto autocicatrizante através do encapsulamento de metasilicato de sódio em perlita e argila expandidas (Evaluation of concrete self-healing by encapsulated sodium metasilicate in perlite and expanded clay)

Autor(en): ORCID
ORCID
ORCID
ORCID
ORCID
ORCID
ORCID
Medium: Fachartikel
Sprache(n): Portugiesisch
Veröffentlicht in: Revista IBRACON de Estruturas e Materiais, , n. 2, v. 16
DOI: 10.1590/s1983-41952023000200001
Abstrakt:

Investigating the behavior of self-healing cementitious composites is necessary to know alternatives that can be applied in structures increasing their life service. Therefore, this study evaluated concrete self-he aling from the use of expanded perlite (EP) and expanded clay (EC) capsules impregnated with a sodium metasilicate solution. These materials were used to substitute natural aggregates in concrete in proportions of 0 wt·%, 15 wt·% and 30 wt·% which were cured in humid or submerged environments. Cracking was induced with a flexural test and a closing with cicatrization product. Was evaluated and measured visually with a software. Capillary absorption tests indicated a reduction in the porosity of samples which incorporated self-healing materials, considering it as an important property related to durability. Samples with EP achieved 100% self-healing with 15% substitution. Crack filling was achieved in cracks up to 0.43 mm wide. Samples with EC achieved 50% crack recovery under humid curing and 90% under submerged curing. It was concluded that incorporating the sodium silicate allowed improvements to fissure sealing and it is an alternative to produce self-healing concrete in Brazil. EP was more effective than EC as encapsulating material. Despite that, the EP did not impact the compressive strength due to ist small size and better packing of the mixture, Also, EP presented higher healing percentage when comparing with samples containing EC.

Copyright: © 2023 Fernanda Pacheco, Cláudio Henrique Boscaini, Thaize Nascimento Gauto, Vinicius Müller, Hinoel Zamis Ehrenbring, Regina Célia Espinosa Modolo, Bernardo Fonseca Tutikian
Lizenz:

Dieses Werk wurde unter der Creative-Commons-Lizenz Namensnennung 4.0 International (CC-BY 4.0) veröffentlicht und darf unter den Lizenzbedinungen vervielfältigt, verbreitet, öffentlich zugänglich gemacht, sowie abgewandelt und bearbeitet werden. Dabei muss der Urheber bzw. Rechteinhaber genannt und die Lizenzbedingungen eingehalten werden.

  • Über diese
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  • Reference-ID
    10693825
  • Veröffentlicht am:
    23.09.2022
  • Geändert am:
    10.11.2022
 
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