New Type of Lime Plaster with Pozzolana Admixture for Renewal of Historical Buildings

2011 ◽  
Vol 324 ◽  
pp. 336-339 ◽  
Author(s):  
Zbyšek Pavlík ◽  
Milena Pavlíková ◽  
Jiří Maděra ◽  
Robert Černý
Keyword(s):  
Computer Code ◽  
Moisture Diffusivity ◽  
Chloride Diffusion ◽  
Chloride Diffusion Coefficient ◽  
Simulation Tool ◽  
Historical Buildings ◽  
Matrix Density ◽  
New Type ◽  
Lime Plaster

Lime plaster modified with pozzolana based on calcined kaoline mixed with mudstone and reference lime plaster are studied in the paper. For the studied materials, determination of bulk density, matrix density and total open porosity is done first. Then, specific attention is paid to the assessment of moisture diffusivity and chloride diffusion coefficient that are considered as decisive parameters for the materials’ durability. The measured data are used as input parameters for computational modeling of studied materials’ performance using computer code TRANSMAT 6.2 based on finite element computer simulation tool. On the basis of measured and calculated results, the applicability of newly developed plaster for renewal of historical buildings is discussed.

Innovative Lime-Pozzolana Renders for Reconstruction of Historical Buildings

2011 ◽  
Vol 324 ◽  
pp. 372-375 ◽  
Author(s):  
Eva Vejmelková ◽  
Petr Máca ◽  
Petr Konvalinka ◽  
Robert Černý
Keyword(s):  
Thermal Conductivity ◽  
Heat Capacity ◽  
Compressive Strength ◽  
Diffusion Coefficient ◽  
Bending Strength ◽  
Moisture Diffusivity ◽  
Historical Buildings ◽  
Matrix Density ◽  
Lime Plaster ◽  
Water Sorptivity

Bulk density, matrix density, open porosity, compressive strength, bending strength, water sorptivity, moisture diffusivity, water vapor diffusion coefficient, thermal conductivity, specific heat capacity and thermal diffusivity of two innovative renovation renders on limepozzolana basis are analyzed. The obtained results are compared with reference lime plaster and two commercial renovation renders, and conclusions on the applicability of the particular renders in practical reconstruction works are drawn.

Application of Two Different Methods for Determination of Water and Chloride Transport Parameters of Building Stones

2014 ◽  
Vol 595 ◽  
pp. 143-148
Author(s):  
Zbyšek Pavlík ◽  
Jan Fořt ◽  
Milena Pavlíková ◽  
Robert Černý
Keyword(s):  
Chloride Transport ◽  
Water Solution ◽  
Chloride Concentration ◽  
Moisture Diffusivity ◽  
Chloride Diffusion ◽  
Chloride Diffusion Coefficient ◽  
Transport Parameters ◽  
Chloride Absorption

The transport of 1M NaCl water solution in three different types of sandstones is studied For basic characterization of studied materials, their chemical composition, porosity, bulk density and matrix density are accessed. The chloride transport is analyzed using two different methods. In the first one, the chloride absorption coefficient is measured on the basis of a modified sorptivity concept. The second method consists in carrying out an inverse analysis of experimentally measured moisture and chloride concentration profiles, leading to the determination of chloride diffusion coefficient as a function of chloride concentration, and moisture diffusivity as a function of moisture content. The chloride transport properties obtained for the particular studied materials are compared and the observed differences are discussed.

Properties of Modified Lime-Based Plasters for Renewal of Historical Buildings Exposed to Accelerated Carbonation Test

2017 ◽  
Vol 909 ◽  
pp. 286-290
Author(s):  
Lucie Zemanová ◽  
Jaroslav Pokorný ◽  
Milena Pavlíková ◽  
Zbyšek Pavlík
Keyword(s):  
Transport Properties ◽  
Diatomaceous Earth ◽  
Linseed Oil ◽  
Water Repellent ◽  
Historical Buildings ◽  
Accelerated Carbonation ◽  
Material Parameters ◽  
Lime Plaster ◽  
Water Transport Properties

This paper deals with determination of basic physical, mechanical, thermal and water transport properties of lime–based plasters whose composition was modified by the addition of diatomaceous earth. To eliminate possible deterioration of original lime plaster by natural weathering, the hydrophobic admixtures on the stearate and oleate basis were added into the plaster mixtures and boiled linseed oil as a painting was applied. All studied material parameters were tested after 28 days of wet curing and after exposition to accelerated carbonation. The results of examined properties of developed plasters gave promising outcomes for the use of hydrophobised materials in renewal of historical buildings. Based on the obtained data, plaster made of lime hydrate, diatomite, and combination of water repellent agents can be recommended for renovation purposes.

Experimental Determination of Material Characteristics of New Type of Plaster

2015 ◽  
Vol 824 ◽  
pp. 21-26
Author(s):  
Miloš Jerman ◽  
Jaromír Žumár
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
New Product ◽  
Moisture Diffusivity ◽  
Life Assessment ◽  
Thermal And Mechanical Properties ◽  
Technical Data ◽  
New Type ◽  
Hygric Properties

New type of commercial plaster which is not well known in the market is investigated in this paper. It is a new product delivered from Turkey, contains 80% of perlit, the binder is unknown and according to the producer it is some type of polymer. According to the producer’s data, the open porosity is 80% and the main advantages are good thermal and mechanical properties. The data in the technical data sheet are not complete, some important information is missing, therefore the basic physical, mechanical, thermal and hygric properties were studied in this paper. Moisture diffusivity, thermal conductivity and specific heat capacity are determined as a function of moisture content. Obtained data were compared with ordinary lime-cement plaster. The results can be further utilized in the computer simulation for service life assessment studies.

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