Effect of modified ethylsilicate consolidants on the mechanical properties of sandstone

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00457998" target="_blank" >RIV/61388955:_____/16:00457998 - isvavai.cz</a>

Alternative codes found

RIV/68378297:_____/16:00457998

Result on the web

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2016.03.001" target="_blank" >http://dx.doi.org/10.1016/j.conbuildmat.2016.03.001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2016.03.001" target="_blank" >10.1016/j.conbuildmat.2016.03.001</a>

Result language

angličtina

Original language name

Effect of modified ethylsilicate consolidants on the mechanical properties of sandstone

Original language description

Silicon alkoxides, such as silicon ethoxide or its oligomers (generally called ethylsilicates), are excellent consolidants for the weathered silicate materials. Their drawbacks, the shrinkage and cracking, can be reduced by the formation of wider pores within the gels or by the modification with particles. The sol-gel process was found to depend on the properties of particles added, especially on their size and surface properties. While the hydrophobization of the particle surface decelerated the process, the adding of hydroxylated particles had only a slight effect on the polycondensation process. In order to suppress the formation of micropores and to support the formation of more advantageous, substantially wider mesopores, organic amines are preferable as catalysts. The role of primary amines with a longer alkyl chain seems more complex than that of mere catalysts. If particles were added, no substantial effect on the character of the porosity was observed. The mechanical properties of gels modified by embedding particles or by creating mesoporosity were substantially changed. Due to the embedding of particles both the hardness and Young’s modulus were increased. On the other hand, the formation of the mesoporosity within the gels had an opposite effect. The modification of consolidants by the creation of mesopores in the gels enabled to achieve an even consolidation of the stone characterized by moderate strength changes due to consolidating treatment. On the contrary, the variants with particles exhibited much higher strength increase in the surface part of stone specimens compared to inner or bottom stone areas, which is not suitable for a satisfactory consolidating intervention.n

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

<a href="/en/project/DF11P01OVV012" target="_blank" >DF11P01OVV012: New materials and technologies for the conservation of the materials of historical monuments and the preventive care</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Construction and Building Materials

ISSN

0950-0618

e-ISSN

—

Volume of the periodical

112

Issue of the periodical within the volume

JUN 2016

Country of publishing house

GB - UNITED KINGDOM

Number of pages

8

Pages from-to

674-681

UT code for WoS article

000375166900066

EID of the result in the Scopus database

2-s2.0-84960172596