Zeolites are natural porous volcanic tuffs that represent hydrated crystalline aluminosilicates m... more Zeolites are natural porous volcanic tuffs that represent hydrated crystalline aluminosilicates minerals with alkaline and earth-alkaline metals. Their chemical properties, a large percentage of porosity, ability of adsorption of the material define high specific surface and low specific weight. Many experimental studies confirm zeolites’ excellent mechanical properties that include this material in the group of building materials for structural elements. Another use of zeolite is as an additive in cement, as an active mineral supplement and binder component for silicate concrete and as gypsum cement pozzolatic binder component and concretes based on them. A mixture of cement and zeolite is used for the production of high-strength concrete with greater compression resistance than that of Portland cement. Primary objective of this paper is to investigate the field of application of zeolites found near Probishtip in Macedonia. Properties of the individual zeolites strongly depend on t...
The increased usage and exploitation of non-metals as a substitute for exploitation and processin... more The increased usage and exploitation of non-metals as a substitute for exploitation and processing of metals, is a trend in the world. Mechanical properties of the material are requisite for determining its application in civil engineering. This paper presents the strength characteristics of the zeolite, obtained from the Strmosh Mine, as well as its capability of water absorption. The procedure, as well as the results of the performed testing of the material are elaborated and presented, followed by a discussion about the obtained values
A Radika river basin is situated in the far western and north-western part of the Republic of Mac... more A Radika river basin is situated in the far western and north-western part of the Republic of Macedonia. The basin nature is well preserved, ecologically balanced and with healthy environment. For the protection of the environment in the catchments area, it is worked on a concept for building appropriate public facilities, i.e. building of a local sanitary landfill and municipal wastewater treatment plants on certain locations. This paper gives an approach which is designed for the solid waste landfill at Centar Zupa, especially the part connected with the preventive measures in designed to reduce to the lowest possible level negative impact on the soil and water environments. The special conditions of the natural geological environment, which are a factor of a prime importance for design are analysed. The design concept is shown briefly, especially the element of geosynthetic system as a main measure for preventing of the possible negative influences. Radika river basin and area of...
Some geotechnical aspects of solid waste treatment through investigations and designing of landfi... more Some geotechnical aspects of solid waste treatment through investigations and designing of landfill “Centar Zupa” are presented in this paper. Material testings are presented, as well as the aspect of stability analysis and stress-strain analysis. The need of determination of strength and deformability properties from large scale samples modeling waste composition is highlighted, as well as there are recommendations for some numerical analysis.
This paper presents a specific methodology for testing shear strength of interfaces implemented w... more This paper presents a specific methodology for testing shear strength of interfaces implemented when investigating and designing the rockfill dam "Kozyak" in the Republic of Macedonia. There are details about applied apparatus for testing, as well as the results from shearing along interfaces bedrock-rockfill material, bedrock-filter zone, bedrock-clay and concrete-clay. The testing is performed in shear box with size 100x100x60 cm. The benefits of this unique large scale methodology are underlined, as well as the possibilities for data extrapolation.
This paper presents the results from field and laboratory testing on low bearing natural subsoil ... more This paper presents the results from field and laboratory testing on low bearing natural subsoil and coarse grained material for pavement layers, stabilized with additives type RBI-81 and RENOLITH. The effect of improvement of mechanical properties such as Californian Bearing Ratio, Uniaxial Compression Strength etc is analyzed for several soil types. The methodology of testing is briefly explained. The improvement of named soil properties is 2,36 - 4 times. Adequate recommendations about possible using of additives RBI and RENOLITH, are discussed for cases of improvement of low bearing subsoil, as well as for coarse grained material which can be used in pavement layers. The favorable aspects of the treatment with such additives, as well as limitations are noted. The problem needs a close communications between Geotechnics, Geology, Chemistry and Civil Engineering experts, in order to minimize the expenses for construction of the roads and the ecological influences on the natural me...
This paper presents the main aspects and experiences gathered during the phase of investigations ... more This paper presents the main aspects and experiences gathered during the phase of investigations and design for the solid waste landfill in the municipality ″Centar Zupa″ in Republic of Macedonia. One of the specifics of this landfill is that it is located not far from the Lake Debar. This situation asked for more detailed and sensitive approach to the problem. A brief overview of the necessary approach in a treatment of such problems is given, having in mind the present situation in this field in country. Some basic elements of the technical solutions are given, as well as the conditions for protection of the natural environment and geotechnical conditions for construction. Some of the results form the investigations of the natural geological media and materials for daily and final covering are also given. An adequate attention is given on the results from stability and stress-strain analyses. A necessity for preparing of specific laboratory test of shear strength and deformability...
Zeolites are natural porous volcanic tuffs that represent hydrated crystalline aluminosilicates m... more Zeolites are natural porous volcanic tuffs that represent hydrated crystalline aluminosilicates minerals with alkaline and earth-alkaline metals. Their chemical properties, a large percentage of porosity, ability of adsorption of the material define high specific surface and low specific weight. Many experimental studies confirm zeolites’ excellent mechanical properties that include this material in the group of building materials for structural elements. Another use of zeolite is as an additive in cement, as an active mineral supplement and binder component for silicate concrete and as gypsum cement pozzolatic binder component and concretes based on them. A mixture of cement and zeolite is used for the production of high-strength concrete with greater compression resistance than that of Portland cement. Primary objective of this paper is to investigate the field of application of zeolites found near Probishtip in Macedonia. Properties of the individual zeolites strongly depend on t...
The increased usage and exploitation of non-metals as a substitute for exploitation and processin... more The increased usage and exploitation of non-metals as a substitute for exploitation and processing of metals, is a trend in the world. Mechanical properties of the material are requisite for determining its application in civil engineering. This paper presents the strength characteristics of the zeolite, obtained from the Strmosh Mine, as well as its capability of water absorption. The procedure, as well as the results of the performed testing of the material are elaborated and presented, followed by a discussion about the obtained values
A Radika river basin is situated in the far western and north-western part of the Republic of Mac... more A Radika river basin is situated in the far western and north-western part of the Republic of Macedonia. The basin nature is well preserved, ecologically balanced and with healthy environment. For the protection of the environment in the catchments area, it is worked on a concept for building appropriate public facilities, i.e. building of a local sanitary landfill and municipal wastewater treatment plants on certain locations. This paper gives an approach which is designed for the solid waste landfill at Centar Zupa, especially the part connected with the preventive measures in designed to reduce to the lowest possible level negative impact on the soil and water environments. The special conditions of the natural geological environment, which are a factor of a prime importance for design are analysed. The design concept is shown briefly, especially the element of geosynthetic system as a main measure for preventing of the possible negative influences. Radika river basin and area of...
Some geotechnical aspects of solid waste treatment through investigations and designing of landfi... more Some geotechnical aspects of solid waste treatment through investigations and designing of landfill “Centar Zupa” are presented in this paper. Material testings are presented, as well as the aspect of stability analysis and stress-strain analysis. The need of determination of strength and deformability properties from large scale samples modeling waste composition is highlighted, as well as there are recommendations for some numerical analysis.
This paper presents a specific methodology for testing shear strength of interfaces implemented w... more This paper presents a specific methodology for testing shear strength of interfaces implemented when investigating and designing the rockfill dam "Kozyak" in the Republic of Macedonia. There are details about applied apparatus for testing, as well as the results from shearing along interfaces bedrock-rockfill material, bedrock-filter zone, bedrock-clay and concrete-clay. The testing is performed in shear box with size 100x100x60 cm. The benefits of this unique large scale methodology are underlined, as well as the possibilities for data extrapolation.
This paper presents the results from field and laboratory testing on low bearing natural subsoil ... more This paper presents the results from field and laboratory testing on low bearing natural subsoil and coarse grained material for pavement layers, stabilized with additives type RBI-81 and RENOLITH. The effect of improvement of mechanical properties such as Californian Bearing Ratio, Uniaxial Compression Strength etc is analyzed for several soil types. The methodology of testing is briefly explained. The improvement of named soil properties is 2,36 - 4 times. Adequate recommendations about possible using of additives RBI and RENOLITH, are discussed for cases of improvement of low bearing subsoil, as well as for coarse grained material which can be used in pavement layers. The favorable aspects of the treatment with such additives, as well as limitations are noted. The problem needs a close communications between Geotechnics, Geology, Chemistry and Civil Engineering experts, in order to minimize the expenses for construction of the roads and the ecological influences on the natural me...
This paper presents the main aspects and experiences gathered during the phase of investigations ... more This paper presents the main aspects and experiences gathered during the phase of investigations and design for the solid waste landfill in the municipality ″Centar Zupa″ in Republic of Macedonia. One of the specifics of this landfill is that it is located not far from the Lake Debar. This situation asked for more detailed and sensitive approach to the problem. A brief overview of the necessary approach in a treatment of such problems is given, having in mind the present situation in this field in country. Some basic elements of the technical solutions are given, as well as the conditions for protection of the natural environment and geotechnical conditions for construction. Some of the results form the investigations of the natural geological media and materials for daily and final covering are also given. An adequate attention is given on the results from stability and stress-strain analyses. A necessity for preparing of specific laboratory test of shear strength and deformability...
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