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HomeSolid State PhenomenaSolid State Phenomena Vol. 276Properties of Aerial Lime-Based Mortars with...

Properties of Aerial Lime-Based Mortars with Chitosan Ethers

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Abstract:

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.

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Periodical:

Solid State Phenomena (Volume 276)

Pages:

75-82

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.276.75

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Online since:

June 2018

Authors:

Tomáš Žižlavský*, Martin Vyšvařil, Patrik Bayer, Pavla Rovnaníková

Keywords:

Carbonation, Chitosan Ethers, Lime Mortar, Porosity, Strength, Water Absorption

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* - Corresponding Author

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