Memorias de investigación
Ponencias en congresos:
Portland cement versus hybrid cement and geopolymers: performance at high temperatures
Año:2015
Áreas de investigación
  • Física química y matemáticas,
  • Ingenierías
Datos
Descripción
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
Internacional
Si
Nombre congreso
14th International Congress on the Chemistry of Cement
Tipo de participación
960
Lugar del congreso
Beijing, China
Revisores
Si
ISBN o ISSN
0000-0000
DOI
Fecha inicio congreso
11/10/2015
Fecha fin congreso
16/10/2015
Desde la página
1
Hasta la página
1111
Título de las actas
14th International Congress on the Chemistry of Cement
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Centro o Instituto I+D+i: CENTRO INVEST. MATERIALES ESTRUCTURALES (CIME)
  • Departamento: Ingeniería Civil: Construcción