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Analysis of fire resistance of cement mortars with mineral wool from recycling

Identifiers
URI: http://hdl.handle.net/20.500.12251/1474
ISSN: 09500618
DOI: 10.1016/j.conbuildmat.2020.120349
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Author
Piña Ramírez, Carolina; Vidales Barriguete, Alejandra; Serrano Somolinos, Rubén; Río Merino, Mercedes del; Atanes Sánchez, Evangelina [et al.]
Date
2020
Subject/s

Resistencia al fuego

Morteros - Construcción

Lana mineral

Residuos de Construcción Demolición (RCD)

Ensayos (propiedades o materiales)

Comportamiento térmico

Propiedades mecánicas

Unesco Subject/s

2205.07 Medidas de Propiedades Mecánicas

2211.02 Materiales Compuestos

3313.04 Material de Construcción

3308.02 Residuos Industriales

3308.07 Eliminación de Residuos

3312.02 Aglomerantes

3312.08 Propiedades de Los Materiales

3312.09 Resistencia de Materiales

3312.03 Materiales Cerámicos

Abstract

The objective of this research is to analyse the fire resistance of cement mortars with mineral wool from construction and demolition waste (CDW) recycling. The recycled mortars are therefore exposed to direct fire reaching a maximum temperature of 700 °C, and an experimental plan is designed to analyse thermo-mechanical behaviour before and after the testing of the mortars with different types of recycled fibres. The results show that the surface hardness of all mortars is practically unchanged after the fire, whereas the incorporation of fibre residues produce a significant improvement in the flexural strength after fire test compared with the reference mortar. The compressive strength values of all mortars decrease after the fire although they remain at optimum values for use according to regulatory requirements. The values of thermal conductivity are lower or remain unchanged after the fire test. Results show that the addition of these recycled fibres can be a sustainable alternative to the commercial ones currently being used, improving mechanical-thermal behaviour after the fire and preventing the explosive behaviour of the mortars. © 2020 Elsevier Ltd

The objective of this research is to analyse the fire resistance of cement mortars with mineral wool from construction and demolition waste (CDW) recycling. The recycled mortars are therefore exposed to direct fire reaching a maximum temperature of 700 °C, and an experimental plan is designed to analyse thermo-mechanical behaviour before and after the testing of the mortars with different types of recycled fibres. The results show that the surface hardness of all mortars is practically unchanged after the fire, whereas the incorporation of fibre residues produce a significant improvement in the flexural strength after fire test compared with the reference mortar. The compressive strength values of all mortars decrease after the fire although they remain at optimum values for use according to regulatory requirements. The values of thermal conductivity are lower or remain unchanged after the fire test. Results show that the addition of these recycled fibres can be a sustainable alternative to the commercial ones currently being used, improving mechanical-thermal behaviour after the fire and preventing the explosive behaviour of the mortars. © 2020 Elsevier Ltd

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