New Cementitious Materials Based on Alkali-Activated Fly Ash: Performance at High Temperatures
By J. Pastor. 2008
204 citations recorded by the source corpus.
This paper reports on a comparative study of the mechanical performance at different temperatures of a commercial Portland cement, used as a control, and a new cementitious material made from an 8M-NaOH activated fly ash and containing no OPC. Two types of mechanical tests were conducted: (i) high temperature mechanical tests, to determine the strength and fracture toughness of the two materials between 25° and 600°C, and (ii) post-thermal treatment tests, to evaluate the residual strength after 1 h of exposure to different temperatures (200°, 400°, 600°, 800°, and 1000°C). In both cases, the results showed that the new cementitious material performed significantly better at high temperatures than the Portland cement control. Differential thermogravimetry (DTG)/TG, Fourier transform infrared (FTIR), and X-ray diffraction analyses were also conducted to analyze the mineralogical and microstructural variations taking place in the material as a result of high temperature exposure. The results of these tests were correlated with the mechanical behaviour observed.
Subfields: Civil and Structural Engineering, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/95ed5f08afd8e63e34a26d2a214277f2be79b01e
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In Civil and Structural Engineering
In Materials Chemistry
Citations in the corpus
- Effect of slag content and activator dosage on the resistance of fly ash geopolymer binders to sulfuric acid attack (2018, background): “reported to occur at around 100 °C [75].”
- Fire Resistance Behaviour of Geopolymer Concrete: An Overview (2021, background): “The referred loss in weight is might be accompanied by the losses of combined as well as adsorbed water in N–A–S–H type gel [126].”