Influence of tire rubber waste on the fire behavior of gypsum coatings of construction and structural elements

  1. M. Ayala 1
  2. M. Lanzón 1
  3. Castellón, F.J. 1
  1. 1 Universidad Politécnica de Cartagena
    info

    Universidad Politécnica de Cartagena

    Cartagena, España

    ROR https://ror.org/02k5kx966

Revista:
Materiales de construcción

ISSN: 0465-2746

Any de publicació: 2022

Volum: 72

Número: 345

Tipus: Article

DOI: 10.3989/MC.2022.06421 DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Materiales de construcción

Objectius de Desenvolupament Sostenible

Resum

The addition of inorganic expanded aggregates, such as perlite or vermiculite is well known in gypsum plasters. However, the reuse of organic wastes in coatings like plasters and renders has been poorly studied. This paper shows the effect of tire rubber wastes on the mechanical properties and fire performance of gypsum plasters. The rubber waste was added to the mixture in mass percentages of 14.50% (C1) and 46.60% (C2). Flexural and compressive strength of plasters made with rubber wastes was visibly reduced as well as their surface hardness (Shore C). In addition, fire tests produced major damages through the entire 2 cm thickness of samples containing rubber wastes, as it was corroborated by X ray diffraction (XRD) and Thermogravimetric (TG) analysis. The heat transfer due to fire exposure modified considerably the chemical composition of plasters, since, on the non-exposed face to fire, the amount of gypsum (CaSO4·2H2O) equivalent to mass loss obtained by TG due to water released by these plasters made with rubber wastes, was 5.4-7.2 lower than that of conventional plasters. The results suggest that certain wastes may reduce the efficiency of gypsum plasters in protecting underneath construction and structural elements against fire.

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Fuente de los datos: Dialnet