Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Mechanical behaviour at high temperature of alkali-activated aluminosilicates (geopolymers)
Year:2015
Research Areas
  • Physics chemical and mathematical,
  • Natural sciences and health sciences,
  • Engineering
Information
Abstract
This study was designed to determine the effect of temperature on the mechanical strength (in both in vivo and post-exposure trials) of two alkaline cements (without OPC): (a) 100% fly ash (FA) and (b) 85% FA + 15% bauxite, the activated alkaline solution used was 85% 10-M NaOH + 15% sodium silicate. A Type I 42.5 R Portland cement was used as a control. Two series of trials were conducted: (i) in vivo trials in which bending and compressive strength, fracture toughness and modulus of elasticity were determined at different temperatures; and (ii) post-firing trials, assessing residual bending and compressive strength after a 1-h exposure to high temperatures and subsequent cooling. The findings showed that from 25 to 600 ?C, irrespective of the type of test (in vivo or post-firing), compressive mechanical strength rose, with the specimens exhibiting elastic behaviour and consequently brittle failure. At temperatures of over 600 ?C, behaviour differed depending on the type of test: (i) in the in vivo trials the high temperature induced pseudo-plastic strain and a decline in mechanical strength that did not necessarily entail specimen failure; (ii) in the post-firing trials, compressive strength rose
International
Si
JCR
Si
Title
Construction And Building Materials
ISBN
0950-0618
Impact factor JCR
2,265
Impact info
Datos JCR del año 2013
Volume
http://dx.doi.org/10.1016/j.conbuildmat.2015.04.04
Journal number
93
From page
1188
To page
1196
Month
SIN MES
Ranking
Participants
  • Autor: Antonia Martin Sanz (UPM)
  • Autor: Jose Ignacio Pastor Caño (UPM)
  • Autor: Angel Palomo (CSIC)
  • Autor: Ana Fernandez (CSIC)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Ingeniería Civil: Construcción
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
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