Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems

Rottstegge, J; Arnold, M; Herschke, L; Glasser, G; Wilhelm, M; Spiess, H W; Hergeth, W D

doi:10.1016/J.CEMCONRES.2004.1

Title: Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems

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Abstract

Construction mortars contain a broad variety of both inorganic and organic additives beside the cement powder. Here we present a study of tile mortar systems based on portland cement, quartz, methyl cellulose and different latex additives. As known, the methyl cellulose stabilizes the freshly prepared cement paste, the latex additive enhances final hydrophobicity, flexibility and adhesion. Measurements were performed by solid state nuclear magnetic resonance (NMR) and low voltage scanning electron microscopy (LVSEM) to probe the influence of the latex additives on the hydration, hardening and the final tile mortar properties. While solid state NMR enables monitoring of the bulk composition, scanning electron microscopy affords visualization of particles and textures with respect to their shape and the distribution of the different phases. Within the alkaline cement paste, the poly(vinyl acetate) (VAc)-based latex dispersions stabilized by poly(vinyl alcohol) (PVA) were found to be relatively stable against hydrolysis. The influence of the combined organic additives methyl cellulose, poly(vinyl alcohol) and latexes stabilized by poly(vinyl alcohol) on the final silicate structure of the cement hydration products is small. But even small amounts of additives result in an increased ratio of ettringite to monosulfate within the final hydrated tile mortar as monitored by {supmore »« less

Authors:

Rottstegge, J ^[1]; Arnold, M ^[1]; Herschke, L ^[1]; Glasser, G ^[1]; Wilhelm, M ^[1]; Spiess, H W ^[1]; Hergeth, W D ^[2]

Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz (Germany)
Wacker Polymer Systems GmbH and Co. KG, Johannes Hess Strasse 24, D-84483 Burghausen (Germany)

Publication Date:: Thu Dec 15 00:00:00 EST 2005

OSTI Identifier:: 20793256

Resource Type:: Journal Article

Journal Name:: Cement and Concrete Research

Additional Journal Information:: Journal Volume: 35; Journal Issue: 12; Other Information: DOI: 10.1016/j.cemconres.2004.10.003; PII: S0008-8846(04)00440-5; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ADDITIVES; CELLULOSE; HARDENING; LATEX; MORTARS; NUCLEAR MAGNETIC RESONANCE; PORTLAND CEMENT; PVA; SCANNING ELECTRON MICROSCOPY

Citation Formats


                    Rottstegge, J, Arnold, M, Herschke, L, Glasser, G, Wilhelm, M, Spiess, H W, and Hergeth, W D. Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems.  United States: N. p., 2005. 
        Web.  doi:10.1016/J.CEMCONRES.2004.1.

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                    Rottstegge, J, Arnold, M, Herschke, L, Glasser, G, Wilhelm, M, Spiess, H W, & Hergeth, W D. Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems.  United States.  https://doi.org/10.1016/J.CEMCONRES.2004.1

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                    Rottstegge, J, Arnold, M, Herschke, L, Glasser, G, Wilhelm, M, Spiess, H W, and Hergeth, W D. 2005.  
        "Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems".  United States.  https://doi.org/10.1016/J.CEMCONRES.2004.1.

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@article{osti_20793256,

  title        = {Solid state NMR and LVSEM studies on the hardening of latex modified tile mortar systems},

  author       = {Rottstegge, J and Arnold, M and Herschke, L and Glasser, G and Wilhelm, M and Spiess, H W and Hergeth, W D},

  abstractNote = {Construction mortars contain a broad variety of both inorganic and organic additives beside the cement powder. Here we present a study of tile mortar systems based on portland cement, quartz, methyl cellulose and different latex additives. As known, the methyl cellulose stabilizes the freshly prepared cement paste, the latex additive enhances final hydrophobicity, flexibility and adhesion. Measurements were performed by solid state nuclear magnetic resonance (NMR) and low voltage scanning electron microscopy (LVSEM) to probe the influence of the latex additives on the hydration, hardening and the final tile mortar properties. While solid state NMR enables monitoring of the bulk composition, scanning electron microscopy affords visualization of particles and textures with respect to their shape and the distribution of the different phases. Within the alkaline cement paste, the poly(vinyl acetate) (VAc)-based latex dispersions stabilized by poly(vinyl alcohol) (PVA) were found to be relatively stable against hydrolysis. The influence of the combined organic additives methyl cellulose, poly(vinyl alcohol) and latexes stabilized by poly(vinyl alcohol) on the final silicate structure of the cement hydration products is small. But even small amounts of additives result in an increased ratio of ettringite to monosulfate within the final hydrated tile mortar as monitored by {sup 27}Al NMR. The latex was found to be adsorbed to the inorganic surfaces, acting as glue to the inorganic components. For similar latex water interfaces built up by poly(vinyl alcohol), a variation in the latex polymer composition results in modified organic textures. In addition to the networks of the inorganic cement and of the latex, there is a weak network build up by thin polymer fibers, most probably originating from poly(vinyl alcohol). Besides the weak network, polymer fibers form well-ordered textures covering inorganic crystals such as portlandite.},

  doi          = {10.1016/J.CEMCONRES.2004.1},

  url          = {https://www.osti.gov/biblio/20793256},
  journal      = {Cement and Concrete Research},

  issn         = {0008-8846},

  number       = 12,

  volume       = 35,

  place        = {United States},

  year         = {Thu Dec 15 00:00:00 EST 2005},

  month        = {Thu Dec 15 00:00:00 EST 2005}

}

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