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Rheological, porosimetric, and SEM studies of cements with additions of natural zeolites

V. Lilkov, O. Petrov and Y. Tzvetanova
Rheological, porosimetric, and SEM studies of cements with additions of natural zeolites (in Zeolite 2010, Ognyan E. Petrov (prefacer) and David L. Bish (prefacer))
Clay Minerals (June 2011) 46 (2): 225-232

Abstract

Rheological, porosimetric, and SEM studies of cements with additions of natural zeolites (chabazite, mordenite and clinoptilolite) were investigated. The addition of 5% zeolite to cement pastes had a plastifying effect. The increase in the rheological parameters of aqueous cement-zeolite suspensions began after additions of more than 10% zeolite. At a water/solid ratio (w/s)=0.5 all compositions exhibited similar rheological behaviour for yield stress and maximum shear stress values. At lower w/s values the rheology depended on the zeolite used, decreasing in the order Sl (clinoptilolite, Nizny Hrabovec deposit, Slovakia), M (mordenite, Philipines), Bp (clinoptilolite, Beli Plast deposit, Bulgaria), NM (clinoptilolite, Saint Cloud deposit, New Mexico) and Ch (chabazite, Nasm Yan deposit, Korea). After 28 days of hydration the mixtures containing 10% Bp clinoptilolite, mordenite, and Sl clinoptilolite (up to 30%) had unchanged specific pore volumes but additions of 10% and 30% of chabazite and NM clinoptilolite and of 30% mordenite and Bp clinoptilolite lead to increases in the total specific pore volume compared to the neat cement paste. Between the 28th and 180th days of hydration the specific volume of the pores in all the cement-zeolite pastes decreased due to the filling of the pores with products from the pozzolanic reaction between the zeolites and the hydration products of the cement. The pozzolanic reaction between zeolite and the hydration products of cement is enhanced by the zeolite content in the samples and depends on the Si/Al ratio (clinoptilolite (Si/Al >4.5), mordenite (Si/Al >5), chabazite (Si/Al <2.5)) and the surface area (clinoptilolite from Slovakia has the smallest crystallites and, hence, the greatest reactive surface area).


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 46
Serial Issue: 2
Title: Rheological, porosimetric, and SEM studies of cements with additions of natural zeolites
Title: Zeolite 2010
Author(s): Lilkov, V.Petrov, O.Tzvetanova, Y.
Author(s): Petrov, Ognyan E.prefacer
Author(s): Bish, David L.prefacer
Affiliation: University of Mining and Geology "Saint Ivan Rilski", Sofia, Belgium
Affiliation: Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography, Sofia, Belgium
Pages: 225-232
Published: 201106
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
Meeting name: 8th international conference on the Occurrence, properties and utilization of natural zeolites (Zeolite 2010)
Meeting location: Sofia, BEL, Belgium
Meeting date: 20100710July 10-18, 2010
References: 13
Accession Number: 2011-073186
Categories: Sedimentary petrologyEconomic geology, geology of nonmetal deposits
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, 1 plate
N41°30'00" - N44°15'00", E22°15'00" - E28°45'00"
N31°30'00" - N37°00'00", W109°04'60" - W103°00'00"
N47°45'00" - N49°40'00", E16°49'00" - E22°30'00"
N33°00'00" - N38°30'00", E126°00'00" - E129°30'00"
Secondary Affiliation: Indiana University, USA, United StatesBulgarian Academy of Sciences, Institute of Mineralogy and Crystallography, Sofia, Bulgaria, BEL, Belgium
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201140
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