Effect of chitosan ethers on fresh state properties of lime mortars

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU125174" target="_blank" >RIV/00216305:26110/17:PU125174 - isvavai.cz</a>
Result on the web
<a href="http://iopscience.iop.org/article/10.1088/1757-899X/251/1/012039" target="_blank" >http://iopscience.iop.org/article/10.1088/1757-899X/251/1/012039</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1757-899X/251/1/012039" target="_blank" >10.1088/1757-899X/251/1/012039</a>

Result language
angličtina
Original language name
Effect of chitosan ethers on fresh state properties of lime mortars
Original language description
The fresh state properties of mortars are eminently important since determine the material workability and also have a great influence on its hardened state characteristics. In this paper, the behaviour of fresh lime mortars modified by etherified derivatives of chitosan (hydroxypropylchitosan (HPCH) and carboxymethylchitosan (CMCH)) is assessed with the purpose of exploring a new application of such derivatives as lime mortar admixtures. The rheological parameters (relative yield stress, consistency coefficient and fluidity index) and viscoelastic properties were correlated with flow table tests, relative density measurements, water retention abilities of mortars and air content in mortars. Results were seen to be strongly dependent on substituents of the chitosan. Non-ionic derivative (HPCH) had a plasticizing influence on the mortars; the ionic CMCH showed the thickening effect. The effect of chitosan ethers was found to be dosage-dependent. CMCH had low impact on water retention, while HPCH displayed high water retention capability. It was concluded, that the ionic derivative (CMCH) is very similar by its viscosity enhancing effect to starch ether.
Czech name
—
Czech description
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Project
<a href="/en/project/LO1408" target="_blank" >LO1408: AdMaS UP – Advanced Building Materials, Structures and Technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017)
ISBN
—
ISSN
1757-8981
e-ISSN
—
Number of pages
8
Pages from-to
1-8
Publisher name
IOP Publishing
Place of publication
Neuveden
Event location
Riga
Event date
Sep 27, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000419383500039

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