Application of positron annihilation lifetime spectroscopy to nano-characterisation of polymer-modified mortars

Paul Guagliardo, Agnieszka Klemm, Sergei N. Samarin, James F. Williams

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Positron annihilation lifetime spectroscopy (PALS) has been applied to study the microstructural features of immature cement mortars. Two types of cement mortars containing superabsorbent polymers (SAPs) were studied, in addition to Ordinary Portland Cement (OPC). The ortho-positronium lifetimes for all samples were in the range of 1.70-1.73 ns, values that are close to that of free water (1.7 ns) and hence suggest the presence of water-filled pores. Periodic lifetime measurements showed that the intensity of this component decreased slightly over a period of four weeks, indicating water loss associated with the curing process, evaporation or a combination of the two.
Original languageEnglish
Title of host publicationWIT Transactions on Engineering Sciences
Subtitle of host publicationMaterials characterisation V
EditorsAndrea Mammoli, Carlos Brebbia, Agnieszka Klemm
Place of PublicationSouthampton, UK
PublisherWIT Press
Pages3-14
Number of pages12
Volume72
ISBN (Print)9781845645380
DOIs
Publication statusPublished - 13 Jun 2011

Keywords

  • PALS
  • cement mortar
  • superabsorbent polymers
  • positronium
  • spectroscopy

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