Investigation of pores in gypsum stone by pulsed-NMR methods

Филиппов, А. В.; Халиуллин, М И; Altykis, M. G.; Рахимов, Р З; Lantsov, V.M.

doi:10.1007/bf02606606

J Appl Spectrosc

1996

DOI: 10.1007/bf02606606

|View full text |Cite

Investigation of pores in gypsum stone by pulsed-NMR methods

А. В. Филиппов¹,

М И Халиуллин²,

M. G. Altykis³

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2001

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Water transport processes play a crucial role in the hardening o f the oxychloride cem ents, and also in the later carbonatization and corrosion processes. NM R relaxometry and diffusometry offer a destruc tion-free approach for studying the dynam ics o f the fluid pore water in hydrating construction materials such as ordinary cem ents [5,6], slag cem ents [7,8] and gypsum [9]. Here, w e report the application o f these techniques to m agnesium oxychloride cem ents.…”

mentioning

confidence: 97%

Nuclear Spin Relaxation and Water Self-diffusion in Hardening Magnesium Oxychloride Cement

Nestle

Galvosas²,

Zimmermann³

et al. 2001

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

In this contribution, we report the results of NMR studies of the behaviour of water in a hydrating Sorel cement paste with a composition close to the stoichiometric optimum. Both the transverse spin-relaxation behaviour and water self-diffusion were studied in two separate experiments performed on samples on the basis of the same formulation. While there is a very strong initial decrease in the transverse relaxation time of the water in the paste, the diffusion coefficient is found to decrease mainly at later times of the hydration process where the decrease of the transverse relaxation time has already strongly slowed down. After about 6 h of the hardening process, the signal intensity available for a pulsed gradient diffusometry experiment is not sufficient any more for reliable measurements of the diffusion coefficients. M agnesium oxychloride cem ents (first described by Sorel [1]) are primarily used as a jointless floor ing material. They are also used in certain plaster and stucco applications and as binder for the produc tion o f light-w eight construction plates from coarse w ood chips. M g oxychloride cem ent is also discussed as a possible material for preventing m ining dam ages from old salt m ines and for sealing hazardous waste dumps in such old m ines [2]. Compared to other binder system s, such as portland cem ent and gypsum , m agnesium oxychloride cem ent provides a higher m echanical strength [3]. O xychloride cem ents are typically prepared from M gO powder and a highly concentrated solution o f M gC l2. In contrast to classical cem ent materials, the pH values for such pastes are typically in the acidic range. For practical application o f oxychloride ce m ents one is usually interested in a com position close to a molar ratio o f (5:1:13) o f (M gO : M gC l2 : wa ter) [4]. O xychloride hydrate phases o f this com po sition are also important in the formation o f early strength o f the hardening mixtures. Water transport processes play a crucial role in the hardening o f the oxychloride cem ents, and also in the later carbonatization and corrosion processes. NM R relaxometry and diffusometry offer a destruc tion-free approach for studying the dynam ics o f the fluid pore water in hydrating construction materials such as ordinary cem ents [5, 6], slag cem ents [7, 8] and gypsum [9]. Here, w e report the application o f these techniques to m agnesium oxychloride cem ents. Materials and Methods Magnesium oxychloride cem ent sam ples were pre pared from food grade "heavy" m agnesium oxide powder obtained from Merck, Darmstadt, and from a 5 M watery solution o f m agnesium chloride hexahydrate (analytical grade, also from Merck, Darmstadt). Pastes were m ixed from 5 g M gO and 5 m l o f the M gC l2 solution by means o f m echanical stirring with a plastics (PVC) rod in sm all rectangular polypropy lene containers. For the experim ents, the sam ples were filled either in plastics sam ple tubes produced from disposable 3 ml polypropylene syringes with a Luer-Lock connector (Becton-D ickinson, M eyl...

show abstract

mentioning

confidence: 97%

Nuclear Spin Relaxation and Water Self-diffusion in Hardening Magnesium Oxychloride Cement

Nestle

Galvosas²,

Zimmermann³

et al. 2001

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Investigation of pores in gypsum stone by pulsed-NMR methods

Cited by 1 publication

References 8 publications

Nuclear Spin Relaxation and Water Self-diffusion in Hardening Magnesium Oxychloride Cement

Nuclear Spin Relaxation and Water Self-diffusion in Hardening Magnesium Oxychloride Cement

Contact Info

Product

Resources

About