Möglichkeiten und Grenzen der Drucklosen Injektionsmittel - Applikation in Mauerwerksbaustoffen

Possibilities and Limitations of the Pressureless Injection Method in Masonry Building Materials

A nyomatmentes injekciós nyomás lehetőségei és hatásai - alkalmazása az épületekben

Walter Astrid

MIK Breuer Marcell Doktori Iskola

Pécsi Tudományegyetem

2018-11-30T08:07:16Z

2018-11-30T08:07:16Z

[2018]

vízszállítás

neutron képalkotó vizsgálatok

injekciós szer alkalmazása

lineáris kapcsolat

lineáris regressziós analízis

transport of water

neutron imaging investigations

application of injection agent

linear relationship

linear regression analysis

All over the world, many buildings and in particular cultural monuments are affected by rising damp due to a missing or non-functional horizontal sealing however their preservation would be valuable for future generations. One possible remedy is the application of a subsequent horizontal sealing by means of a pressureless injection method but the results are often varying or even inadequate so that in consequence the method itself is frequently questioned. This phenomenon prompted the fol-lowing research on the possibilities and limitations of the pressureless injection method on com-mon building materials. As a result of the investigations mentioned before, several factors have a limiting effect on the spreading of an injection agent, in which case the prevailing factor is the existing degree of mois-ture penetration of the building material. Based on the results obtained, it is possible to derive a model of the spreading of an injection agent in building materials and therefore it is possible to make a prediction regarding the effect of the sealing. It was also found that the combination of the injection agent used and the build-ing material produces specific results that cannot be transferred to other building material/in-jection agent combinations. In addition to this, it is possible to present the distribution of an injection agent in the building material three-dimensionally with the help of neutron imaging. By means of methods such as Neutron Radiography and Neutron Tomography it can be proven that the distribution of an in-jection agent in the inner part of a building material is not homogenous: the concentration is higher at the edges of the impregnated samples, caused by variations in moisture content. In summary, the results provide valuable information regarding the widely differing sealing re-sults in construction practice and show possibilities for optimizing the planning and execution of the method.

német

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application/pdf

https://pea.lib.pte.hu/handle/pea/18091