Jan Plachý

• Institute of Technology and Business

The paper deals with the correlation between the amount of fillers and the thermal resistance of bitumen sheets under EN 1110:2011. Based on the analysis of samples of bitumen sheets used for the insulation of concrete bridges, the standard EN 14695:2010 indicates what the usual amount of fillers is and what the value of the resistance to flow at e...

The paper deals with air flow in open air gap in pitched roofs with folded roofing. The sloping roof is thermally insulated to the passive standard. Double-skinned roofs work with the drainage of moisture from the air gap based on the difference in water vapor pressure that is generated by the warming of the air gap. Moisture removal is suppressed...

This paper deals with diagnostics of flat roofs with flexible sheets for waterproofing (membrane). The diagnostics is focused on defects and water tightness of membrane. The roof is one of the building’s most important building envelope. In case of defect, the other layers of the roof, including the structure frame, are degraded. The introduction g...

This paper deals with the problematics of the surface temperature of flat roofs, where the waterproofing layer is used as polymeric waterproofing membrane of softened PVC. Currently, it is possible to encounter defects on flat roofs due to the high surface temperature of the waterproofing layer. The consequence of such a high surface temperature is...

The research content of the paper is focused on landscape-vegetation and technical-economic optimization of vegetation elements of buildings. The length of the motorway in the Czech Republic has increased approximately three times since 1995. Road transport infrastructure is constantly growing. Ensuring the passage of important transport structures...

The research content of the paper is focused on landscape-vegetation and technical- economic optimization of vegetation elements of buildings. The length of the motorway in the Czech Republic has increased approximately three times since 1995. Road transport infrastructure is constantly growing. Ensuring the passage of important transport structure...

Bitumen sheets are mainly used in the building industry as a waterproofing material. The waterproofing function in bitumen sheets is ensured by the bitumen mass and its quantity and composition. The important component of bitumen mass is the filler. An increased amount of filler reduces the cost of bitumen and thus the cost of a complete bitumen sh...

Bitumen sheets are isolating materials that are used in the building construction, primarily as roof waterproofing, vapour barrier and waterproofing of the substructure. For civil engineering they are applied as the isolation of concrete bridge decks and they are used as the main waterproofing for underground construction. Currently, bitumen sheets...

This paper deals with the interaction between collar roofs and the bottom support structure made as a reinforced concrete rim. In present, the collar roofs are widely used for their ability to omit internal vertical support structures (columns, support walls), which might be sometimes a complication during a design of the layout of the building. Co...

This paper follows up on the results of a research presented at the conference Building Defects 2017. The paper deals with the dimensional stability of bitumen sheets. The manifestation of insufficient dimensional stability is the shrinkage of bitumen sheets in the transverse joints. Shrinkage of bitumen sheets with reinforced polyester liner and a...

This paper deals with the surface temperature problem of flat roofs, where bitumen sheets are used as the final waterproofing layer. Currently it is possible to find defects due to the high surface temperature of the waterproofing layer on flat roofs. The result of such a high surface temperature is, for example, the release of bitumen sheets and t...

One of the frequent sources of flat roof faults is failure of the top layer of a multilayer bitumen sheet system in cross-connections. One of the possible causes of this disorder is failure to observe technological discipline. The paper deals with how the full melting of the bitumen sheet influences its possible shrinkage during the roof exposure....

This article focuses on the frequently discussed topic how to make the frontal joints of bitumen sheets with coarse-grained surface coating. Bitumen sheets have a spill in the place of these joints. Insufficient strength of the frontal joint is one of the possible faults in waterproofing using bitumen sheets. The paper compares different ways of pe...

Nowadays the problems occur when a structure engineer need to assess the ultimate limit state of timber bolt connection which is subjected to double unequal shears. This assessment of ultimate limit state shows the reliability of these connections. In assessing the reliability of this connection in ultimate limit state is a problem, because the for...

This paper is based on research dealing with defects that appear on concrete bridge decks with an insulating layer from asphalt strips on the interface between the asphalt strip and its basis. The durability and lifespan of the bearing structure of concrete bridge is determined by insulating layer that constitutes, together with the primary layer a...

The paper deals with load-carrying capacity of bolted connections subjected to unequal double shear with thin plates as outer members and inner timber member. This type of connection is usually widespread and in building support structures made of wood is commonly used. This may occur for example in skeletal structures which contain structural elem...

Biochar refers to carbon-based dusty residues obtained from biomass pyrolysis. This recently rediscovered traditional soil improver is currently being glorified for its wide portfolio of favorable environmental aspects. With its lifetime of several centuries, it is being widely accepted as a promising method of carbon sequestration. Moreover, it ha...

During the renovation of flat roofs, the waterproofing layer is often repaired locally rather than completely replaced. When making such repairs, it is very important to know whether the proposed bitumen sheets are compatible in order to prevent delamination and the release of the joints. This paper deals with the determination of the resistance of...

One of the most frequent sources of faults on flat roofs is a violation of the waterproof layers along the transverse joints between bitumen sheets. This fault is caused by a failure to adhere to the technological methodologies. This paper presents current solutions, as well as a new solution, for creating such joints. The new solutions are experim...

During the renovation of flat roofs, the waterproofing layer is often repaired locally rather than completely replaced. When making such repairs, it is very important to know whether the proposed bitumen sheets are compatible in order to prevent delamination and the release of the joints. This paper deals with the determination of the resistance of...

The publication analyses selected works of one of the most important representatives of Baroque Gothic. Jan Blazej Santini Aischl represents an important personality in the world of architecture from the early 18th century. Architect Jan Blazej Santini Aischl got to the reconstruction now very prized buildings due to their devastation during the wa...

The aim of the publication was to bring information about violations of building Byzantine Hagia Sophia in Istanbul. Hagia Sophia is the most important Byzantine church built in the 6th century, which became a model for all the former architecture. Until now it is one of the largest churches in the world. He became an inspiration and role model for...

Objective of case studies is to demonstrate the specific character of the buildings, which are not built by using traditional construction materials. They are excavated into the geological environment as the caverns. These specific structures have a specific building construction, but they also tend to be violated by any other way than in conventio...

Dynamic methods are adopted in numerous civil engineering sections. Especially evaluation of the earthwork quality can be speed up using these methods. The results of the parallel measurements of selected testing devices for determining the quality of soil compaction were used for comparative analysis. The correlations between values obtained from...

The publication aims to bring undoubted importance approximate table bearing capacity of gravel soils, which are used in the new constructions. Tabulated values enable to determine the estimated bearing capacity of foundation soil for a simple and inexpensive construction to a depth of 1 meter. In the publication there are compares particular class...

This paper deals with the investigation of the interdependence between the flow resistance at elevated temperatures for reinforced bitumen sheets and softening points of bitumen matter softening point in these reinforced bitumen sheets. Reinforced bitumen sheets, which are used for waterproofing isolation of concrete bridge decks, were selected as...

During decreasing of the energy demand is within the framework of the idea of sustainable construction not only required to decrease the total energy demand of the buildings, search and solve the critical spots in the building jacketing, but also to use the secondary raw materials as full-value substitutions for commonly used products from the prim...

This contribution focuses on the examination of the mutual dependence between the degree of modification of bitumen sheets and the strength characteristics of their mechanically fastened joints.Bitumen sheets with differently modified bitumen substances which were used as single-layer mechanically fastened waterproofing membranes for flat roofs wer...

Mechanically fastened flexible roof waterproofing membranes - MEFAWAME is regarded as an effective way how to stabilize the roofsheathing in the new industrial buildings, shopping centers, but also widely used technology of roof reconstruction. This technology is fast, reliable, and relatively independent of the weather.

This paper exams the dependence of soil temperature fields of basement structures of buildings on the type of the surrounding soil. The 3D simulation model is based on data from real measurements of soil temperatures during the winter over a period of two years. The measured data were incorporated into the model on the basis of statistical evaluati...

Geotechnical engineers need access to the best scientific data available that describe the geological environment and processes in it. This article describes the development of conceptual model of geological environment in landslide areas. Landslide areas are environments where the interests of science and society meet. Numerical modelling of vario...

The article presents the 3D survey of the open-pit mine in order to develop a 3D digital model for identification and quantification of the limestone deposits. The main principle of 3D laser scanning are explained and presented. The computer GIS techniques for data processing and creation of 3D digital model are presented and quantification 3D anal...

The aim of this report is to evolve the suggestion for determining the limiting value of the qualitative requirements for the flow resistance during high temperatures for reinforced bitumen sheets that are used as the waterproofing of the concrete bridge decks due to EN 14695:2010 and ČSN 736242:2010. Suggested revisions of the standards will lead...

This contribution deals with the issue of the weight absorption of bitumen waterproofing sheets. The aim is to determine which parameter the weight absorption depends on, according to the laboratory measurement and the statistical evaluation. This dependence is to be examined based on the results of the weight absorption achieved by the two differe...

This contribution deals with the quantity of fillers in bitumen waterproofing sheets used for waterproofing of concrete bridge decks. The contribution shows on samples of bitumen waterproofing sheets from various manufacturers what the usual quantity of filler is in these products. The contribution also answers to the hypothesis whether increased o...

This contribution deals with the composition of the bitumen substance of bitumen waterproofing sheets used in bridge decks in the Slovak Republic. This contribution examines the samples of waterproofing sheets from various manufacturers in terms of the bitumen areal weight and the quantity of fillers in the bitumen substance. This contribution also...

This contribution deals with the issue of epoxy resin based sealing layers as a part of waterproofing system of concrete bridge decks. The contribution focuses on semi-operational and laboratory tests performed to investigate failures of the carriageways on bridges.

The article deals with the issue of weight water absorption of bitumen waterproofing sheets. It compares two methodologies applicable to examination of water absorption of bitumen waterproofing sheets from the point of view of testing procedures. It compares the results of both the methods for individual bitumen sheets upon experimental measurement...

The article points out and describes in detail the basic thermal bridges in contact thermal insulation systems and in ventilated facades. Thermal bridges are illustrated by means of thermal images of spot thermal bridges and the calculation of spot heat transfer coefficients.

This article deals with determination of bulk density of bitumen waterproofing sheets using different methods, namely calculation and experimental measurement. Volume density actually well reflects bitumen sheet composition. Composition of bitumen sheet is the factor that influences the hydro insulation function.