Detail publikace
Properties of Aerial Lime-Based Mortars with Chitosan Ethers
ŽIŽLAVSKÝ, T. VYŠVAŘIL, M. BAYER, P. ROVNANÍKOVÁ, P.
Originální název
Properties of Aerial Lime-Based Mortars with Chitosan Ethers
Anglický název
Properties of Aerial Lime-Based Mortars with Chitosan Ethers
Jazyk
en
Originální abstrakt
This paper studies the possibility of usage of chitosan derivatives (hydroxypropyl chitosan (HPCH) and carboxymethyl chitosan (CMCH)) as admixtures for aerial lime-based mortars. The physical-mechanical properties were studied on the specimens prepared with constant water/binder ratio and binder/aggregate ratio 1:3 by weight using siliceous sand with the grain size up to 4 mm and doses of admixture ranging between 0.5 and 10‰. The properties were studied on the specimens up to 365 days. The addition of admixtures improves workability of mortar, but in the early stages also decreases strengths of mortars, especially the compressive strength. The addition of HPCH significantly reduces the bulk densities of specimens, while CMCH decreases them just slightly. With the increasing amount of time, the difference in strengths between reference and tested mortars decreases, reaching the similar values after 90 days of curing time. The further ageing causes additional growth of strengths with a significantly higher increase in the case of CMCH.
Anglický abstrakt
This paper studies the possibility of usage of chitosan derivatives (hydroxypropyl chitosan (HPCH) and carboxymethyl chitosan (CMCH)) as admixtures for aerial lime-based mortars. The physical-mechanical properties were studied on the specimens prepared with constant water/binder ratio and binder/aggregate ratio 1:3 by weight using siliceous sand with the grain size up to 4 mm and doses of admixture ranging between 0.5 and 10‰. The properties were studied on the specimens up to 365 days. The addition of admixtures improves workability of mortar, but in the early stages also decreases strengths of mortars, especially the compressive strength. The addition of HPCH significantly reduces the bulk densities of specimens, while CMCH decreases them just slightly. With the increasing amount of time, the difference in strengths between reference and tested mortars decreases, reaching the similar values after 90 days of curing time. The further ageing causes additional growth of strengths with a significantly higher increase in the case of CMCH.
Dokumenty
BibTex
@inproceedings{BUT148519,
author="Tomáš {Žižlavský} and Martin {Vyšvařil} and Patrik {Bayer} and Pavla {Rovnaníková}",
title="Properties of Aerial Lime-Based Mortars with Chitosan Ethers",
annote="This paper studies the possibility of usage of chitosan derivatives (hydroxypropyl
chitosan (HPCH) and carboxymethyl chitosan (CMCH)) as admixtures for aerial lime-based
mortars. The physical-mechanical properties were studied on the specimens prepared with constant
water/binder ratio and binder/aggregate ratio 1:3 by weight using siliceous sand with the grain size
up to 4 mm and doses of admixture ranging between 0.5 and 10‰. The properties were studied on
the specimens up to 365 days. The addition of admixtures improves workability of mortar, but in
the early stages also decreases strengths of mortars, especially the compressive strength. The
addition of HPCH significantly reduces the bulk densities of specimens, while CMCH decreases
them just slightly. With the increasing amount of time, the difference in strengths between reference
and tested mortars decreases, reaching the similar values after 90 days of curing time. The further
ageing causes additional growth of strengths with a significantly higher increase in the case of
CMCH.",
booktitle="Binders, Materials and Technologies in Modern Constructions IV",
chapter="148519",
doi="10.4028/www.scientific.net/SSP.276.75",
howpublished="online",
number="276",
year="2018",
month="june",
pages="75--82",
type="conference paper"
}