The hydration of reactive cement-in-polymer dispersions studied by nuclear magnetic resonance

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2011.06.015· OSTI ID:21576902

Olaru, A M ^[1]; Weichold, O ^[2]; Adams, A ^[1]

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1. Institut fuer Technische und Makromolekulare Chemie, RWTH Aachen University, Templergraben 55, 52056 Aachen (Germany)
2. DWI an der RWTH Aachen, e. V., Pauwelsstrasse 8, 52056 Aachen (Germany)

The behaviour of two novel cement-in-polymer (c/p) dispersions, namely cement-in-poly(vinyl acetate) and cement-in-poly(vinyl alcohol) upon exposure to water at room temperature was investigated by a combination of various NMR methods. The swelling, cracking, and the water ingress were monitored non-destructively using {sup 1}H single point imaging. The hydration of the cement matrix was investigated using {sup 29}Si NMR whilst {sup 13}C CPMAS NMR spectra allowed the quantification of the kinetics of the hydrolysis reaction of poly(vinyl acetate) into poly(vinyl alcohol). The polymer controls the rate of water ingress and swelling which in turn determines the behaviour of the c/p dispersions upon exposure to water. For the cement-in-poly(vinyl alcohol), the rates of water ingress and swelling are much faster than the hydration of the clinker whilst for the cement-in-poly(vinyl acetate) the slow rates of the two processes allow the formation of a cementious matrix which assures the stability of the sample.

• OSTI ID: 21576902
• Journal Information: Cement and Concrete Research, Vol. 41, Issue 11; Other Information: DOI: 10.1016/j.cemconres.2011.06.015; PII: S0008-8846(11)00189-X; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
CEMENTS
CONTROL
CRACKING
DISPERSIONS
HYDRATION
HYDROLYSIS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
PVA
STABILITY
SWELLING
VINYL ACETATE
WATER
ACETIC ACID ESTERS
ALCOHOLS
BUILDING MATERIALS
CARBOXYLIC ACID ESTERS
CHEMICAL REACTIONS
DECOMPOSITION
DEFORMATION
ESTERS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LYSIS
MAGNETIC RESONANCE
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
POLYVINYLS
PYROLYSIS
RESONANCE
SOLVATION
SOLVOLYSIS
SPECTRA
THERMOCHEMICAL PROCESSES