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Analysis of EMW radiation for sterilization of biotic pests
Danielová, Marie ; Svobodová, Kateřina (referee) ; Holešovský, Jan (advisor)
Biotic pests such as wood-destroying fungi, molds, and wood-destroying insects are not only a problem for old buildings but also for newer buildings. Their occurrence has a negative effect on the physical and mechanical characteristic of building materials. One of the main causes of biotic pests in buildings is moisture. Remediation of objects in terms of moisture and biotic pests is a frequent subject of solution in construction practice. There are many methods used to remove moisture and inactivate biotic pests, and their use depends on the individual requirements of individual objects. In practice, this problem is dealt with by specialized companies using well-known technologies or further participate in their research. One of the methods used for moisture remediation and inactivation of biotic pests is the irradiation of building structures using EMW radiation. Microwave heating used to dry moisture from building materials is one of the most intensive methods for sterilizing biotic pests, and due to its intensity, it is a time and cost-effective method.
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The reconstruction design of timber structures of the existing building
Bartlová, Jana ; Šmak, Milan (referee) ; Straka, Bohumil (advisor)
The content of this work was to carry out construction-technical survey of timber structures of the existing building in order to design an appropriate procedure for their reconstruction. The survey showed construction in an unsatisfactory to disrepair, so further work also includes the static calculation of new structures proposed instead of the current. Timber structure in the building has form of staircase, roof and ceiling construction. Newly designed the following types of stairs and roof trusses from which the lower belts are used as ceiling beams. The new proposal also includes possible roofing, roofing options, developed one of them. The work also includes drawings, bill of materials and cost estimate staircase structure and truss. Specialization in the field of civil engineering is represented by drawings of the new truss and passport (view of current state) whole object on parcel ST.74 / 1, land Tišnov (okr.Brno-venkov), the content of which was the basis for this work.
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Assessment of the state of wood in the construction and evaluation of the usefulness of non-destructive testing methods
Munduchová, Markéta ; Vaněrek, Jan (referee) ; Brožovský, Jiří (advisor)
This bachelor's thesis consists of theoretical and experimental part. In the theoretical part there are given findings regarding on structure of wood, its basic properties and durability. The following describes the wood defects, influence of wood pests and fungi, types of wooden structures, climatic conditions, chemical corrosion and mechanical damage to the wood. Evaluation of the status of wood in the structures is appropriate by using non-destructive methods, therefore was performed research articles on these methods. Non-destructive methods are used: visual, hardness tests, electrical, radiation, optical and moisture determination. Experimental part of the bachelor's thesis is focused on ultrasonic impulse method, that can detect defects or damage in the wood mass that depends on the speed of ultrasonic impulse. For a reliable interpretation of the results it is appropriate to combine non-destructive methods when assessing status of wood structure.
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The reconstruction design of timber structures of the existing building
Bartlová, Jana ; Šmak, Milan (referee) ; Straka, Bohumil (advisor)
The content of this work was to carry out construction-technical survey of timber structures of the existing building in order to design an appropriate procedure for their reconstruction. The survey showed construction in an unsatisfactory to disrepair, so further work also includes the static calculation of new structures proposed instead of the current. Timber structure in the building has form of staircase, roof and ceiling construction. Newly designed the following types of stairs and roof trusses from which the lower belts are used as ceiling beams. The new proposal also includes possible roofing, roofing options, developed one of them. The work also includes drawings, bill of materials and cost estimate staircase structure and truss. Specialization in the field of civil engineering is represented by drawings of the new truss and passport (view of current state) whole object on parcel ST.74 / 1, land Tišnov (okr.Brno-venkov), the content of which was the basis for this work.
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Assessment of the state of wood in the construction and evaluation of the usefulness of non-destructive testing methods
Munduchová, Markéta ; Vaněrek, Jan (referee) ; Brožovský, Jiří (advisor)
This bachelor's thesis consists of theoretical and experimental part. In the theoretical part there are given findings regarding on structure of wood, its basic properties and durability. The following describes the wood defects, influence of wood pests and fungi, types of wooden structures, climatic conditions, chemical corrosion and mechanical damage to the wood. Evaluation of the status of wood in the structures is appropriate by using non-destructive methods, therefore was performed research articles on these methods. Non-destructive methods are used: visual, hardness tests, electrical, radiation, optical and moisture determination. Experimental part of the bachelor's thesis is focused on ultrasonic impulse method, that can detect defects or damage in the wood mass that depends on the speed of ultrasonic impulse. For a reliable interpretation of the results it is appropriate to combine non-destructive methods when assessing status of wood structure.
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Defects and pests of wood
REJŽEK, Lukáš
This bachelor thesis describes defects in wood and wood-decaying biological pests. For wood defects are explained causes of formation and their impact on the workability and usability of the material. The chapters on insects and wood-rotting fungi are mentioned the most important kinds of pests, their development in the wood, the level of damage and marginally possibilities of prevention or pest control. The text is accompanied by pictures. A two-part presentation serves for practical use in teaching at primary and secondary schools. The work also includes a collection of defects in wood and wood-boring insect grub holes.
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