Faculty of Civil Engineering

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Red Clay as a Raw Material for Sustainable Masonry Composite Ceramic Blocks
(MDPI AG, 2025-07-28)
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Zileska Pancovska, Valentina
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Golaboski, Bojan
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The pursuit of sustainable construction practices has become imperative in the modern era. This paper delves into the research of the properties and application of a specific material called “red clay” from the locality “Crvena Mogila” in Macedonia. A series of laboratory tests were conducted to evaluate the physical, mechanical, and chemical properties of the material. The tested samples show that it is a porous material with low density, high water absorption, and compressive strength in range of 29.85–38.32 MPa. Samples of composite wall blocks were made with partial replacement of natural aggregate with red clay aggregate. Two types of blocks were produced with dimensions of 390 × 190 × 190 mm, with five and six holes. The average compressive strength of the blocks ranges from 3.1 to 4.1 MPa, which depends on net density and the number of holes. Testing showed that these blocks have nearly seven-times-lower thermal conductivity than conventional concrete blocks and nearly twice-lower conductivity than full-fired clay bricks. The general conclusion is that the tested red clay is an economically viable and sustainable material with favourable physical, mechanical, and thermal parameters and can be used as a granular aggregate in the production of composite ceramic blocks.
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Application of Built back better (BBB) concept in rehabilitation of landslides along Macedonian road network
(2022-07)
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Experiences and practices from application of rockfall remedial works at MKD national road network
(IOP Publishing, 2023-12-01)
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Peševski, Igor
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Papić, Jovan Br.
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Abazi, Sead
Rockfalls, landslides and floods continue to have a growing share in the overall damages and losses, influencing considerably the national budget. Recent experiences and practices related to application of stabilisation measures and remediation of rockfall zones along MKD national road network are presented in the article. Analyses are based on case histories where the prognosis of geotechnical conditions is a key element in definition of remedial measures for rock slopes. Some issues related with Consequence Class, as suggested in Eurocode 7 202x, and the concepts of Acceptable Level of Risk are presented. Proposals in definition of Acceptable Level of Risk, through combining Probability of Failure, Reliability Index and Consequence Classes, are given in the article. These findings can help in development and/or improvement of rockfall, landslide and flood risk management strategies.
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Treatment of engineering geology and geotechnics in investigation and exploitation of mineral resources
(Macedonian Geological Society, 2021)
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Panov, Zoran
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Abazi, Sead
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Engineering-geological and geotechnical investigations and tests in function of mining in Macedonia
(Macedonian Geological Society, 2021)
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Nedelkovska, Bojana
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Assessment of the effectiveness of trenches for capturing rockfalls
(Macedonian Association of Road Engineers, 2022)
Ivanovski, Simona
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ASSESMENT OF ROCKFALL DITCH EFFECTIVENES BY APPLICATION OF COMPUTER SIMULATIONS, AN PROBABILISTIC APPROACH
(Goce Delchev University - Shtip, 2022)
Ivanovski, Simona
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Peševski, Igor
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Abazi, Sead
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Papić, Jovan
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Strength-deformability properties of tailing dam sand in large load span and unsaturated conditions
(WILEY, Ernst & Sohn, 2018)
Jovanov, Zoran
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Abazi, Sead
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Papić, Jovan
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Peševski, Igor
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Probno opterećenje i nosivost šipova Ø1200 izloženim silama do 9000 kN
(2017)
Gjorgjevski, Spasen
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Susinov, Bojan
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Abazi, Sead
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Papić, Jovan
Na deonici autoputa Koridora VIII kroz zapadni deo R. Makedonije, u fazi izrade je veliki broj mostova. Deo njih je fundiran na šipovima, pri čemu su vršena i probna opterećenja. U radu su prezentovani pojedini rezultati ispitivanja za utvrđivanje nosivosti šipova uz pomoć specijalne čelične platforme u okviru naučnog projekta koji je Građevinski fakultet u Skoplju realizovao u saradnji sa građevinskim kompanijama uključenim u radovima. Pri tome, detaljnije će biti opisan postupak probnog opterećenja šipa Ø1200 mm, dužine 16 m i projektovane nosivosti 9000 kN. Kako bi se utvrdila ultimativna nosivost šipa, vršeno je i numeričko modeliranje preko kalibriranja modela za ispitana opterećenja.
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Complex laboratory tests for determination of strength-deformability parameters in unsaturated conditions for sand from tailing dam
(2017-11)
Papić, Jovan
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Abazi, Sead
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Peševski, Igor
One significant portion of the Earth’s surface is subjected to dry and semi-dry climatic conditions, and consequently, many of the soils in engineering practice are unsaturated. A specific type of structures where the change in the degree of saturation is a result of both climatic changes, as well as draining conditions are tailing dams. Tailing dams are objects of capital importance where the downstream slope is made of fine sand in wet condition. The draining reduces the saturation degree, which favorably influences the behavior of the dam. However, this aspect is not considered during their design, so there always remains the dilemma of "reserves" of shearing strength. Hence, the interest arises to study the properties of tailing sand in different conditions of saturation and to implement them in the numerical analysis for the calculation of stresses, strains and stability. Such dedicated tests are carried out at several high-educational institutions, and thereafter applied in the stability analyses. The obtained lab-numeric results contribute to the clarification of the role and influence of partial saturation on the shear strength, slope stability and deformability of tailing sand.

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