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Traditional lime technologies of historical buildings and their use at present. Final report
Válek, Jan
The project was based on a design and construction of a lime kiln. The kiln was tested and described and it enabled to study the effects of traditional lime production on quality of lime. This also allowed to produce lime binders, which were commonly used in the past and were later on abandoned. Research and experimental works focused on quality of lime putties and determining the suitability of different types of previously used materials for production of lime binders. Detailed research of available resources related to the lime production was carried out. The important aim was creation of applied outputs that would be useful in practical care of historical buildings.
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Desing and production of specialized lime binders for restoration of monuments using historical technologies
Válek, Jan ; Matas, Tomáš ; Jiroušek, Josef ; van Halem, Eveline ; Hauková, Petra ; Frankeová, Dita ; Frankl, Jiří ; Tomanová, Olga ; Panáček, Michal
The methodological guideline supports the use of traditional lime materials for repair of historical buildings. It describes the main steps to be carried out when it is required to use a traditional lime mortar. The guideline provides an overview of the circumstances for using traditional technologies which are applied in the design and selection of lime binder and its treatment. It specifies essential procedures and principles that determine traditional production and processing of lime and recommends specific procedures for the lime processing and mortar production. The guideline is intended for architects, building engineers, cultural heritage conservators, conservation scientists, technologists, restorers and practitioners.
Fulltext: content.csg -  PDF
Plný tet: 0453847_2015_Valek_et_al_Navrh_a_vyroba_specializovanych_vapennych_pojiv_pro_obnovu_pamatek_s_vyuzitim_historickych_technologii_CM_010 - PDF
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Experimental lime kiln for small scale production of lime binders
Válek, Jan ; Matas, Tomáš ; Jiroušek, Josef
A small scale lime kiln was designed and built in order to evaluate production of historic lime binders. The kiln does not copy any specific historic model. It is designed to simulate variety of “traditional” lime calcination procedures. The construction of the kiln is presented in details. The prototype is equipped with sensors and the burning process is monitored by a set of thermocouples in three levels, air flow on the air inlet and composition of emissions (CO, CO2 and O2). The obtained data are used for assessment of the whole burning process and its optimisation.
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Reconstruction of a Baroque Open Beam Ceiling Based on Material Analysis
Kloiber, Michal ; Válek, Jan ; Bláha, Jiří ; Čechová, J.
Reconstruction of a ceiling in the north-eastern wing of a former water fortress in Jeseník was carried out during the repair of its roof structure and replacement of the roof. The most damaged parts of the bearing ceiling beams were removed and partially replaced with new timber in the 70s of the 20th C. The way the work was carried out corresponded to the methods and approaches of the cultural heritage protection of that time. The replacement of damaged heads of ceiling beams with new timber that was fitted without connection to the original ceiling beams and only simply hanged on a metal girder can be considered highly provisional from the current perspective. That is why the repair of timber structures of the water fortress included also a reconstruction of the original ceiling system.
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Experimental study of traditional lime binders
Matas, Tomáš ; Válek, Jan ; Jiroušek, Josef
Prototype of a lime kiln has been developed in order to replicate production of selected lime binders used in the past. Experimental study deals with quality of lime putty and the influence of calcination on its quality. Standardised test are used along with specially designed experimental tests for the description of the products.
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