abstract
In this study, the possibility of using glass fibre wastes as reinforcement agent of waste-based and low thermal conductivity geopolymer mortars was evaluated to expand on previous work performed on dense geopolymers. The individual and combined influence of the glass fibre and the blowing agent amount on the fresh- and hardened-state properties of geopolymeric mortars was investigated. Results demonstrate that the fibres incorporation effectively enhances the mortars' flexural (up to 23%) and compressive strength (up to 30%) in comparison with the un-reinforced foams. Moreover, the fibres inclusion did not significantly alter the specimens' thermal conductivity, which demonstrates the suitability of the proposed approach. The low thermal conductivity (227 mW/m K) and apparent density (1.00 g/cm(3)) of the mortars' associated with their flexural (1.23 MPa) and compressive strength (2.94 MPa) suggests the use of these innovative materials in non-structural applications. (C) 2019 Elsevier Ltd. All rights reserved.
keywords
HARDENED-STATE PROPERTIES; POROUS FLY-ASH; REINFORCED GEOPOLYMER; THERMAL-CONDUCTIVITY; RHEOLOGICAL BEHAVIOR; CEMENT; REMOVAL; CONCRETE; POROSITY; ADSORBENTS
subject category
Construction & Building Technology; Engineering; Materials Science
authors
Senff, L; Novais, RM; Carvalheiras, J; Labrincha, JA
our authors
João António de Sousa Carvalheiras
PhD Student
João António Labrincha Baptista
Full professor
Rui Miguel Novais
Assistant Professoracknowledgements
The authors would like to thank the research funding agency CAPES for support through the postdoctoral scholarship: 88881.118842/2016-01 for Luciano Senff. R.M. Novais wishes to thank FCT for supporting his work (researcher grant Ref. CEE-CIND/00335/2017). J. Carvalheiras also acknowledges his FCT grant (SFRH/BD/144562/2019). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. LED/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co -financed by FEDER under the PT2020 Partnership Agreement.