Influence of processing in vapors of quaternary compounds of ammonium (triamon) on the Portland cement sorption properties

Olga V. Artamonova; Evgeny А. Tutov; Dmitry L. Goloshchapov

doi:10.17308/sorpchrom.2015.15/278

Olga V. Artamonova Cand. Sci. (Chem.), Associate Professor, Department of Chemistry, Voronezh State University of Architecture and Civil Engineering; e-mail: ol_artam@rambler.ru
Evgeny А. Tutov Dr. Sci. (Chem.), Professor of Physics Department, Voronezh State University of Architecture and Civil Engineering; e-mail: tutov_ea@mail.ru
Dmitry L. Goloshchapov Goloshchapov Dmitry L. — Cand. Sci. (Phys.- Math.), Chief Engineer, Senior Researcher, Department of Solid State Physics and Nanostructures, Voronezh State University

DOI: https://doi.org/10.17308/sorpchrom.2015.15/278

Keywords: ordinary Portland cement, quaternary ammonium compound, adsorption modification, water repellency

Abstract

The electro-physical parameters of cement-containing capacitive structures are studied using
dielectric spectroscopy under water vapor sorption conditions. For surface treatment of ordinary Portland
cement from vapor phase, we used triamon as a substance-modifier. The composition of triamon corresponds
to the chemical formula [(HOC2H4)3N
+CH3][CH3SO3¯ ]. The frequency dependence of electro-physical
parameters of the structures were studied in the frequency range 12 Hz – 100 kHz using the Goodwill LCRmeter
(model 819). For this technique the samples was pressed with tin foil under high pressure (300 bar).
The end thickness of such parallel-plate capacitor was ~1 mm. The electro-physical parameters of ordinary
Portland cement weakly depend on the relative humidity of air up to ~ 75 %. For p/ps > 85 %, sorption of
water vapor may lead to the capillary condensation in non-modified Portland cement. Increase of
hydrophobic properties of an ordinary Portland cement as a result of processing in vapors of quaternary
compounds of ammonium is revealed. The found effect may be useful for industrial production of dry cement
mixes.

Downloads

Download data is not yet available.

References

1. Cabeza M., Merino P., Miranda A. et al.
Impedance spectroscopy study of hardened
Portland cement paste, Cement and Concrete
Research, 2002, Vol. 32, pp. 881-891.
2. Cruz J.M., Fita I.C., Soriano L. et al. The
use of electrical impedance spectroscopy for
monitoring the hydration products of Portland
cement mortars with high percentage of
pozzolans, Cement and Concrete Research,
2013, Vol. 50, pp. 51-61.
3. Goloshchapov D.L., Lenshin A.S., Tutov
E.A. et al. Sorption properties of composite
materials based on calcium hydroxyapatite,
Smart Nanocomposites, 2013, Vol. 4, pp. 101-
104.
4. Sánchez-Fajardo V.M., Torres M.E.,
Moreno A.J. Study of the pore structure of the
lightweight concrete block with lapilli as an
aggregate to predict the liquid permeability by
dielectric spectroscopy, Construction and
Building Materials, 2014, Vol. 53, pp. 225–234.
5. Syrkov A.G. Surface-nanostructured metals
and their tribochemical properties, Smart
Nanocomposites, 2012, Vol. 3, pp. 59-66.
6. Tutov E.A., Tutov A.E., Butusov I.Yu. et
al. Elektrofizicheskie i sorbtsionnye
kharakteristiki geterostruktury propolis/kremnii
[The electrophysical and sorption characteristics
of heterostructure propolis/silicon],
Tutov et al. / Сорбционные и хроматографические процессы. 2015. Т. 15. Вып. 2
304
Sorbtsionnye i khromatograficheskie protsessy,
2009, Vol. 9, No 2, pp. 296-300.
7. Hu A., Fang Y., Young J.F. et al. Humidity
dependence of apparent dielectric constant for
DSP cement materials at high frequencies, J.
Am. Ceram. Soc., 1999, Vol. 82, No 7,
pp. 1741-1747.
8. Wu M., Johannesson B., Geiker M.
Application of water vapor sorption
measurements for porosity characterization of
hardened cement pastes, Construction and
Building Materials, 2014, Vol. 66, pp. 621-633.