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

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

doi:10.2495/MC110011

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

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

Civil Engineering and Environmental Management

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	WIT Transactions on Engineering Sciences
Subtitle of host publication	Materials characterisation V
Editors	Andrea Mammoli, Carlos Brebbia, Agnieszka Klemm
Place of Publication	Southampton, UK
Publisher	WIT Press
Pages	3-14
Number of pages	12
Volume	72
ISBN (Print)	9781845645380
DOIs	https://doi.org/10.2495/MC110011
Publication status	Published - 13 Jun 2011

Keywords

PALS
cement mortar
superabsorbent polymers
positronium
spectroscopy

Documents and Links

10.2495/MC110011

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Guagliardo, Paul ; Klemm, Agnieszka ; Samarin, Sergei N. ; Williams, James F. / Application of positron annihilation lifetime spectroscopy to nano-characterisation of polymer-modified mortars. WIT Transactions on Engineering Sciences: Materials characterisation V. editor / Andrea Mammoli ; Carlos Brebbia ; Agnieszka Klemm. Vol. 72 Southampton, UK : WIT Press, 2011. pp. 3-14

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title = "Application of positron annihilation lifetime spectroscopy to nano-characterisation of polymer-modified mortars",

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. ",

keywords = "PALS, cement mortar, superabsorbent polymers, positronium, spectroscopy",

author = "Paul Guagliardo and Agnieszka Klemm and Samarin, {Sergei N.} and Williams, {James F.}",

note = "Keynote Paper presented on the 5th International Conference on Computational Methods and Experiments in Materials Characterisation, Kos, Greece",

year = "2011",

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Application of positron annihilation lifetime spectroscopy to nano-characterisation of polymer-modified mortars. / Guagliardo, Paul; Klemm, Agnieszka; Samarin, Sergei N.; Williams, James F.

WIT Transactions on Engineering Sciences: Materials characterisation V. ed. / Andrea Mammoli; Carlos Brebbia; Agnieszka Klemm. Vol. 72 Southampton, UK : WIT Press, 2011. p. 3-14.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Application of positron annihilation lifetime spectroscopy to nano-characterisation of polymer-modified mortars

AU - Guagliardo, Paul

AU - Klemm, Agnieszka

AU - Samarin, Sergei N.

AU - Williams, James F.

N1 - Keynote Paper presented on the 5th International Conference on Computational Methods and Experiments in Materials Characterisation, Kos, Greece

PY - 2011/6/13

Y1 - 2011/6/13

N2 - 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.

AB - 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.

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KW - cement mortar

KW - superabsorbent polymers

KW - positronium

KW - spectroscopy

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M3 - Conference contribution

SN - 9781845645380

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BT - WIT Transactions on Engineering Sciences

A2 - Mammoli, Andrea

A2 - Brebbia, Carlos

A2 - Klemm, Agnieszka

PB - WIT Press

CY - Southampton, UK

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