This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge ...of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, haematite and calcite. The fly ash and slag chemical properties are the most important indicators in the evaluation of their suitability as a building material. The ash and slag chemical composition is composed of the following chemical components: SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, S, Na2O and K2O. Results of laboratory tests show that fly ash and slag have variable chemical, mineralogical and physical properties that are dependent on the natural composition, quality of coal from basin, the manner of combustion and place of ash deposition.
The management of the road network presents the process of decision making on investments, where it is very important to solve numerous technical and economic issues and to provide as much objective ...technical and economic information as possible for final decision making. Planning the maintenance of the road network is one of the basic tasks for each road network manager. This paper presents a methodological procedure for the preparation of economic analysis and assessment of investments for the periodic maintenance of roads with example of the state road IB 21, section Irig - Ruma, in the total length of 15,580 km as a part of the national road rehabilitation project and the improvement of road safety in the Republic Serbia.
Construction of Road Embankment with Waste Materials Vatin, Nikolay; Radović, Nebojša; Šešlija, Miloš
Applied Mechanics and Materials,
01/2015, Letnik:
725-726, Številka:
Innovative Technologies in Development of Construction Industry
Journal Article
Recenzirano
Fly ash represents a residue that occurs as a product of burning finely milled particles of coal in thermal power plants. The fly ash in the construction of embankments in road construction can be ...used with or without the addition of binders. For the construction of embankment from the ashes, aside embankments (trapezoid shape) are placed. Justification of this study is the fact that so huge amounts of this material are left aside, while there are great possibilities for using of natural materials in the construction of roads.
The paper presents the application of cement stabilization in the world and in our country. In addition to the literature review, basic physical - mechanical tests of the pavement base without the ...use of hydraulic binder and with the use of hydraulic binder with different percentages of participation (2, 4, and 6%) were given. The hydraulic binder of the manufacturer LaFarge HRB 12.5 was used as a binder, and the material on which this binder was tested is a clay material taken in the vicinity of Belgrade. Using this binder, it was concluded that any percentage of binder leads to significant improvement of the placenta and thus improves the load-bearing capacity of the pavement structure.
У дисертацији су анализиране мешавине за израду порозног бетонског коловоза. Пројектовано је укупно 12 различитих врста мешавина. За справљање бетонских мешавина коришћене су фракције природног и ...рециклираног агрегата. Електрофилтерски пепео, који је отпадни материјал из термоелектрана, коришћен је као минерални додатак, којим је замењен део цемента. Справљено је шест мешавина са рециклираним агрегатом и шест мешавина са природним агрегатом. Лабораторијска испитивања су обухватила испитивање чврстоће при притиску бетона након: 7, 28, 56 и 84 дана, чврстоће при савијању (након 28, 56 и 84 дана), модул еластичности (статички и динамички), отпорност према хабању, коефицијент водопропустљивости и порозност. Добијени резултати потврдили су постављене хипотезе да је са рециклираним агрегатом и електрофилтерским пепелом могуће пројектовати и извести порозни бетонски коловоз.
Construction management of projects via BIM Jovanov Aleksandra; Peško Igor; Mučenski Vladimir ...
Zbornik radova Građevinskog fakulteta (Subotica),
01/2019, Letnik:
2019, Številka:
36
Journal Article
Recenzirano
Odprti dostop
BIM (Building Information Modeling) is the construction of a digital integrated model (information) of an existing or future built environment.
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