This paper deals with possibility of using recycled construction and demolition waste as aggregate for concrete. The European Standards describes tests and properties of recycled aggregate for concrete. The main aim of this investigation was determination of recycled aggregates properties and their comparing with properties of natural aggregate and requirements in Standards. Selected geometrical and physical properties were tested and results were used to design concrete mixture. It was found that the main differences between natural and recycled aggregate is water absorption. Water absorption of recycled aggregate was more than ten times higher.

Measurement of short term water absorption and thermal conductivity was carried out on samples of traditional insulation and the insulation samples from natural fibers. Further, the measured change in thermal conductivity after soaking and subsequent drying of the original weight.
The results showed that the thermal insulation of natural materials retain their original properties – thermal conductivity, shape, compared to conventional insulation.

The article deals with sound insulation of wooden house constructions, including the national requirements for sound insulation of walls. There is also a brief description of the laboratory measurement of the sound insulation of wall constructions and information about the sound insulation of single and double wood-based structures.

A new type of circular wind bracing has been developed for stiffening of high-rise slender steel structures. This bracing can use pre-stress to modify its stiffness to achieve required properties. The models scalled 1/20 are subject to static and dynamic load laboratory tests in order to prove theoretical conclusions and to adjust optimal values of pre-stress.

The term “ancillary materials” covers a wide range of products (mouldings, profiles etc.) which significantly influence the overall quality of works. As legislation normally does not require any verification of performance and no relevant standards exist, verification and declaration of performance is usually omitted. In reaction to that, we have specified characteristics and verification methods for adequate and consistent verification of relevant characteristics in the framework of voluntary certification.

Every construction project passes through its life cycle, from initial idea, through the design, implementation, or to change the construction and use to disposal. Article highlights the interdependence of the life cycle of buildings with durability and amortization of buildings and does not omit important perspective on this issue, which is the economic expression of the parts of individual cost items arise during the life cycle.

This paper describes the experience gained in planning, design and implementation of rehabilitation reinforced concrete structure, which is formed in the lower part of the reinforced concrete skeleton, from 3.NP T06B wall system with regard to the loading of the next deck above.

From the 1^st January 2013 new legal and technical regulations are coming in force, which have an impact on higher requirements on energy use for heating and this way also on energy use for heating and cooling. These requirements are stricter not only on the new, but also on major renovated buildings. Proposed measures must fulfil hygienic and energy requirements set by STN 73 0540-2: 2012. Calculated thermal protection properties of building structures are influenced by the properties of used components. Conformity of achieved real properties with the design of building depends from the accuracy of components properties, their real quality and quality of the installation. The design values for construction materials (products) are set in STN 73 0540-3: 2012.

Existing procedures for determining heat transfer in the soil. Temperature measurements in the soil under the floor of the experimental house MSDK at the Technical University in Ostrava. The difference between the calculated temperatures and actually measured. Theoretical and real temperature field in the soil.

Recently broad media in the Czech Republic coverage on hazards from PV systems to fire fighters. Similar situation was in Germany two years ago. That is why Fraunhofer-Institut für Solare Energiesysteme ISE together with TÜV Rheinland and other partners implemented a research project „Assessment of fire risks in PV systems and development of safety concepts for risk mitigation“. The project concluded that the fire risk of PV system is much less than it is publicly alleged in Germany.
There is a small risk that fires can be started by PV components. This risk can be reduced by careful installation, initial verification i.e. inspection and testing, periodic verifications, (yield) monitoring to detect degradation problems, and verification of test procedures and maintenance requirements for conventional AC- components. Overall conclusion is that PV systems are not maintenance free.

Whole presentation from EU PVSEC (in English).

The real energy savings potential in the buildings in the Czech Republic study presents two main ways of energy savings development in heating in the residential buildings in the C.R. and informatively also energy savings development in heating in the buildings for education.

Blocks for masonry with integrated insulation material are known over 30 years. Especialy hollow clay bricks have low U value due to optimalization of their geometry with low thermal conductivity of ceramic body. Finaly integrated insulation material into the holes in bricks results to increasing of thermal insulation properties. Article is focus on behavior of hollow clay bricks with and without integrated insulation material in dynamic heat load.

The article deals with four-point bending test of beams made from fibre reinforced concrete with recycled aggregate and output of this test the load-deflection diagram. The differences between long and short fibres, quick and slow bending test and variation of amount of fibres are showed here.

EU declared the year 2013 us year o air. Producers and manufacturers of plastics, including EPS insulation for buildings contribute to improve the quality of the air. It describes approaches to solving envorinmental and health aspects of EPS applications.

The paper is focused on the results of testing of a key segment of the tunnel lining, which is important for the capacity of the tunnel lining itself. Strength parameters of the designed structural steel fibre reinforced concrete (SFRC) element are described. SFRC key segment with fibres dosages 50 kg/m³ are compared with ordinary RC key segment.

The development of "national plan for increasing the number of nearly zero energy buildings" is a major task of the European Parliament and of the Council Directive 2010/31/EU of 19 May 2010 On the energy performance of buildings, which was transposed by Act no. 300/2012 Coll that amends and supplements Act no. 555/2005 Coll. On the energy performance of buildings, and amends and supplements Act no. 50/1976 Coll. Planning and building regulations (Building Act).

The experimental results of long-term monitoring of total strain in two prestressed reinforced concrete sleepers B91 S, produced by ŽPSV a.s. are shown in the article. Total strain of monitored prestressed sleepers was measured by long-gauge optical fibres SOFO.

The article introduces the testing procedure of levelling instruments in construction. Generally described testing and validation procedure of levelling instruments (optical and digital as well) is supplemented by results and evaluation of four selected levelling instruments (Sokkia C40, Geo Fennell NO.10, Spectra AL100 a Leica Sprinter 150) used to work in technical levelling.

The heat transfer coefficient is an important parameter in the energy rating of buildings. It is certainly interesting to the influence of this parameter on the energy rating. In this article, this is calculated on a real house. This is designed as passive.

In order to assess the diffusion rate of solar and wind power plants in the Czech residential sector, we analyse data on licenses for business in the energy industries. We arbitrary set the maximum installed capacity for installations on residential roofs on 10 kWe and find out that the current number of such installations corresponds to 0.5 % of inhabited family houses in the Czech Republic, with most installations being in the Pilsen region and least in the Karlovy Vary and Liberec regions.
When compared with the overall development of solar power plants, it shows that the installations of up to 10 kWe accounted for about 35 % of all the solar power plant installations, but only for 1.9 % of the total installed capacity. Micro wind turbines are up to now not very expanded; we found only 20 installations of micro wind turbines.