THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS
Lime-based renders are common part of historical or older buildings that don’t always provide a comfortable inside climate due to the problems with high thermal losses. Thermal insulation renders may possibly retrofit or replace original render layers and mitigate negative impacts of harmful externa...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2019-07-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5660 |
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| author | Jaroslav Pokorný Milena Pavlíková Zbyšek Pavlík |
| author_facet | Jaroslav Pokorný Milena Pavlíková Zbyšek Pavlík |
| author_sort | Jaroslav Pokorný |
| collection | DOAJ |
| description | Lime-based renders are common part of historical or older buildings that don’t always provide a comfortable inside climate due to the problems with high thermal losses. Thermal insulation renders may possibly retrofit or replace original render layers and mitigate negative impacts of harmful external climate. In this respect, determination of basic structural, mechanical and thermal properties of lime-based renders containing various amount of perlite that was used as partial silica sand replacement is presented in the paper. Experimental tests performed for 28 days high relative humidity-cured samples showed significant decrease in bulk density and apparent density for renders with incorporated perlite compared to reference render mix composed of silica sand-based aggregate only. Accordingly, porosity of perlite mortars was significantly higher, what led to the lower thermal conductivity values in comparison with reference render. Although the mechanical resistance of perlite-modified renders was lower than that of reference material, it was still sufficient for their use as thermal insulation layer compatible with older construction materials. Based on the obtained data it can be concluded, the analysed hydrated lime-based plasters with perlite admixture can be considered as promising materials for buildings refurbishment. |
| format | Article |
| id | doaj-art-6e759ca1cf1d42498ccc32a2954a942e |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2019-07-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-6e759ca1cf1d42498ccc32a2954a942e2025-08-20T03:56:18ZengCzech Technical University in PragueActa Polytechnica CTU Proceedings2336-53822019-07-01220838710.14311/APP.2019.22.00834568THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERSJaroslav PokornýMilena PavlíkováZbyšek PavlíkLime-based renders are common part of historical or older buildings that don’t always provide a comfortable inside climate due to the problems with high thermal losses. Thermal insulation renders may possibly retrofit or replace original render layers and mitigate negative impacts of harmful external climate. In this respect, determination of basic structural, mechanical and thermal properties of lime-based renders containing various amount of perlite that was used as partial silica sand replacement is presented in the paper. Experimental tests performed for 28 days high relative humidity-cured samples showed significant decrease in bulk density and apparent density for renders with incorporated perlite compared to reference render mix composed of silica sand-based aggregate only. Accordingly, porosity of perlite mortars was significantly higher, what led to the lower thermal conductivity values in comparison with reference render. Although the mechanical resistance of perlite-modified renders was lower than that of reference material, it was still sufficient for their use as thermal insulation layer compatible with older construction materials. Based on the obtained data it can be concluded, the analysed hydrated lime-based plasters with perlite admixture can be considered as promising materials for buildings refurbishment.https://ojs.cvut.cz/ojs/index.php/APP/article/view/5660hydrated lime, perlite, renders, thermophysical properties |
| spellingShingle | Jaroslav Pokorný Milena Pavlíková Zbyšek Pavlík THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS Acta Polytechnica CTU Proceedings hydrated lime, perlite, renders, thermophysical properties |
| title | THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS |
| title_full | THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS |
| title_fullStr | THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS |
| title_full_unstemmed | THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS |
| title_short | THE USE OF LIGHTWEIGHT AGGREGATE IN PREPARATION OF THERMAL INSULATION LIME-BASED RENDERS |
| title_sort | use of lightweight aggregate in preparation of thermal insulation lime based renders |
| topic | hydrated lime, perlite, renders, thermophysical properties |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/5660 |
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