Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Portland cement versus hybrid cement and geopolymers: performance at high temperatures
Year:2015
Research Areas
  • Physics chemical and mathematical,
  • Engineering
Information
Abstract
This paper reports on a comparative study of the mechanical performance at high temperatures of a commercial Portland cement (CEM I 42.5 (OPC); (b) a hybrid cement (CEM HYC=25% clinker + 35% BFS +35% FA +5% activator); (c) and a Geopolymer (Fly ash activated with waterglass solution). Two types of mechanical tests were conducted on samples made of each of those three cementitious systems: i) high temperature mechanical tests, to determine the mechanical strength and fracture toughness and ii) post-thermal treatment tests, to evaluate the residual strength after 2 hours of exposure to temperatures ranging from 400 oC to 1000 oC. Differential thermo-gravimetric (DTA)/TG, X-ray diffraction and Hg porosimetry were conducted to track the mineralogical and microstructural variations taking place in the materials. The results of these tests were correlated to the mechanical behaviour observed. The results from the three binders have provided with new ideas about the relation between the elemental composition of materials and the high-temperature performance. It will be an important factor to be taken into account when determining the high-temperature performance of future cements and concretes. Originality The high-temperature resistance of cementitious materials is a key factor of safety in fire events. This paper presents the physical and chemical changes taking place during and after exposure to high temperature for different types of cement materials (OPC, Hybrid cement and geopolymer) and also the factors playing the most important role in the changes induced by temperature. Key words: high temperature resistance, durability, hybrid eco-cements, alkali-activated fly ash, paste
International
Si
Congress
14th International Congress on the Chemistry of Cement
960
Place
Beijing, China
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
11/10/2015
End Date
16/10/2015
From page
1
To page
1
Proceedings of the 14th International Congress on the Chemistry of Cement
Participants
  • Autor: Bo Qu (UPM)
  • Autor: Antonia Martin Sanz (UPM)
  • Autor: Jose Ignacio Pastor Caño (UPM)
  • Autor: Angel Palomo (CSIC)
  • Autor: Ana Fernández Jiménez (CSIC)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Materiales Estructurales Avanzados y Nanomateriales
  • Departamento: Ciencia de Materiales
  • Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Ingeniería Civil: Construcción
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