Sveuciliste u Ljubljani

Dol pri Ljubljani, Slovenia

Sveuciliste u Ljubljani

Dol pri Ljubljani, Slovenia
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Praznik M.,Gradevinski Institute ZRMK | Zbasnik-Senegacnik M.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2015

The main requirement for the design of modern family houses is a high energy performance. With the properly selected heat generation system, the primary energy consumption and CO2 emissions can be reduced over decades of building use. In addition to the service life of the building, the construction stage also constitutes a burden with regard to energy and environment. Houses have an embodied primary energy and CO2 emissions, which is why efforts are currently made to improve the thermal envelope, ventilation, and the heat generation system. An additional requirement for energyefficient buildings involves a minimum embodied energy.


Hocevar A.,Igmat D.d. Building Materials Institute | Kavcic F.,Igmat D.d. Building Materials Institute | Bokan-Bosiljkov V.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2013

The comparison of rheological parameters for 26 different types of fresh concrete, measured with two co-axial cylinder rheometers ConTec Viscometer 5 and ICAR Rheometer, is presented in the paper. The consistency by slump test and flow table test was also measured. Statistical analyses of results show good correlation between the two rheometers for the yield stress and plastic viscosity. During this study, a strong correlation was established between the yield stress and workability, while the correlation is weak between the workability and plastic viscosity.


Zavrtanik N.,IGMAT D.D. | Ljubic A.,IGMAT D.D. | Turk G.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2015

The main purpose of this research is to establish a method for identifying statistical deviations in the analysis of properties of the asphalt mix AC 22, which are not accidental, but are caused by external factors, such as the change of standards, laboratory equipment, or staff. The analysis was made to determine deviation of correlation coefficients for properties of asphalt mixes divided into two groups. The groups are related to two time intervals, and the computation was repeated by random selection of data within the two groups, so as to determine deviations within the groups.


Kilar V.,Sveuciliste u Ljubljani | Koren D.,Sveuciliste u Ljubljani | Zbasnik-Senegacnik M.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2013

Thermal insulation under the building foundation plate or under the strip foundations prevents the thermal bridge on the contact between the building and supporting terrain and reduces the energy consumption in modern passive and low energy houses. In the paper the seismic behaviour of buildings with different heights, floor plan dimensions, on different soil conditions and on different thermal insulation layers have been analysed. The results of simplified seismic analyses have shown, that the potentially negative influences of inserting the insulation under the foundation plate could be expected only for buildings with more than two or three storeys.


Within the framework of the new socio-developmental paradigm, the doctrine of planning and the realization of residential buildings in Slovenia has also been changing. Based on an analysis of typical examples of "constructing for the market" we have established that nowadays the economic performance of the investment and the formal technological norms are exclusively prevalent among the project's starting points. To improve the conditions, suitable tools will have to be efficiently introduced into the national legislation.


The paper introduces the issue of man-made climate change as well as social, political and technological development that led to the construction and spread of the ideas about the ability of geo-engineering inter entions to mitigate expected climate changes. At the same time geo-engineering, defined as large-scale environmental engineering able to counteract the changes in atmospheric chemistry, is observed together with the concept of risk society as well as technological attempts to resolve contemporary problems that are at least partially of socio-cultural and not only of technical or natural origin. The central part of the paper presents an overview and categorization of specific geo-engineering techniques considering their mechanisms, supposed theoretical efficiency to reduce global warming and possible unintended negative consequences. The paper also discusses the potential of mentioned geo-engineering techniques for purposeful adversarial use in the sense of dual-use technology. The concluding part summarizes the findings from the analysis and identifies geo-engineering techniques that involve the least risk. The paper also discusses the position of technology and risk in risk society, as well as possible dangers of the commercialization of geo-engineering that might, through post-academic models of science, lead to the normalization and implementation of those geo-engineering techniques that have the highest potential for side effects.


Simonic M.J.,Institute Gradevinarstva ZRMK | Bosiljkov V.,Sveuciliste u Ljubljani | Zarnic R.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2014

Laboratory and in-situ shear tests of walls strengthened with Carbon FRP (Fiber Reinforced Polymer) strips and Glass FRP grid were compared to the results of different calculation models for masonry with FRP. Tests on new and old solid brick specimens showed an increase in shear strength and ultimate displacement. The best results were obtained with horizontally and horizontally-vertically epoxy-bonded strips and modified cement mortar grid configurations, worse with diagonal strips due to peeling failure. ACI and CNR calculation approaches showed the best agreement with experimental results.


Kusar M.,Sveuciliste u Ljubljani | Selih J.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2014

During operation, bridge condition is decreasingdue to various effects. The condition is described by "condition rating coefficient", determined byvisual assessment Condition of Slovenian state road bridge network is analyzed. The condition rating database is structured with respect to traffic load, climate zone, structural material, structural type and bridge element Changes of condition rating coefficientwith timeare presented and analyzed. Results show that climate and exposure to water are the most important parameters influencing the condition of bridges. Challenges related to assessment methodology are identified and discussed.


Uranjek M.,Gradevinski Institute | Zarnic R.,Sveuciliste u Ljubljani | Bokan-Bosiljkov V.,Sveuciliste u Ljubljani | Bosiljkov V.,Sveuciliste u Ljubljani
Gradjevinar | Year: 2014

Grout injection is one of the most effective and often most appropriate techniques for strengthening of old stone masonry walls. In order to assess the influence of different types of injection grouts on the mechanical properties of masonry, an actual stone masonry building was tested in-situ using various testing methods. The results obtained were used to evaluate seismic resistance of a building using the pushover method, and considering the storey mechanism approach and the global response mechanism. More compatible types of grouts can match cement grouts. The results show that the global response approach provides more realistic results even for low-rise masonry buildings.

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