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The paper presents the experimental studies on the effect of the water containing micro-nano bubbles of various gases on the physico-mechanical properties of lime-cement mortars. In total, 7 types of mortars were prepared: with water containing the micro-nano bubbles of O2, O3 or CO2 as 50% or 100% substitute of ordinary mixing water (tap water) and the reference mortar prepared using tap water. In order to determine the influence of water with micro-nano bubbles of gases, the consistency of fresh mortar and the physical properties of hardened mortar, i.e., specific and apparent density, total porosity, water absorption by weight and capillary absorption, were established. The mechanical strength of the considered mortars was studied as well by conducting the tests for flexural and compressive strengths following 14, 28 and 56 days. Reduced workability and capillary absorption were observed in the modified mortars within the range of 0.9–8.5%. The mortars indicated an increase in the flexural strength after 28 days ranging from 3.4% to 23.5% and improved compressive strength in 1.2–31%, in comparison to the reference mortar. The conducted studies indicated increased flexural and compressive strengths along with the share of micro-nano bubbles of gases in the mixing water.
Małgorzata Grzegorczyk-Frańczak; Danuta Barnat-Hunek; Wojciech Andrzejuk; Jacek Zaburko; Monika Zalewska; Grzegorz Łagód. Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases. Materials 2021, 14, 1902 .
AMA StyleMałgorzata Grzegorczyk-Frańczak, Danuta Barnat-Hunek, Wojciech Andrzejuk, Jacek Zaburko, Monika Zalewska, Grzegorz Łagód. Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases. Materials. 2021; 14 (8):1902.
Chicago/Turabian StyleMałgorzata Grzegorczyk-Frańczak; Danuta Barnat-Hunek; Wojciech Andrzejuk; Jacek Zaburko; Monika Zalewska; Grzegorz Łagód. 2021. "Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases." Materials 14, no. 8: 1902.
In line with the current trend of seeking alternative methods for modification of the existing building composites, such as mineral–asphalt mixtures (MAMs), the materials from concrete and ceramics recycling are being used in increasingly wider applications. When added to MAMs as an aggregate, ceramic building material, which has different properties than the raw material (clay), may significantly influence the aggregate properties, including the wettability, porosity, asphalt adhesion, and consequently the mixture durability. The material’s microstructure was found using SEM. The wetting properties of mineral–asphalt mixtures were determined by measuring the contact angles (CA) of their surfaces, using water as the measuring liquid. The total surface free energy (SFE) values were determined using the Neumann method. When analyzing the research results, it can be noticed that the chemical composition of the ceramic aggregate has a significant influence on the adhesion of asphalt to its surface due to the chemical affinity. Waste ceramic aggregate, despite its acidic pH value being connected with its elevated silica content, exhibits good adhesive properties.
Wojciech Andrzejuk; Andrzej Szewczak; Stanisław Fic; Grzegorz Łagód. Wettability of Asphalt Concrete with Natural and Recycled Aggregates from Sanitary Ceramics. Materials 2020, 13, 3799 .
AMA StyleWojciech Andrzejuk, Andrzej Szewczak, Stanisław Fic, Grzegorz Łagód. Wettability of Asphalt Concrete with Natural and Recycled Aggregates from Sanitary Ceramics. Materials. 2020; 13 (17):3799.
Chicago/Turabian StyleWojciech Andrzejuk; Andrzej Szewczak; Stanisław Fic; Grzegorz Łagód. 2020. "Wettability of Asphalt Concrete with Natural and Recycled Aggregates from Sanitary Ceramics." Materials 13, no. 17: 3799.
This article presents test results and examines the possibilities of using aggregate from ceramic waste for mineral-asphalt mixtures. In addition, the mineral composition, physical and mechanical properties of aggregates from natural raw materials such as dolomite, granodiorite and waste ceramic aggregate (introduced as a partial substitute for the main aggregate) were analyzed. The shape of grains was examined by determining the shape and flatness index of aggregates, resistance to grinding and frost resistance. The tested properties have a direct impact on the durability of road surfaces. To this end, the adhesion of asphalt to the surface of the aggregates used was additionally determined. Determination of surface roughness and two-dimensional (2D) topography of tested aggregates was carried out. The aggregates microstructure examination, coupled with the energy-dispersive X-ray spectroscopy (EDS) analysis, was conducted to determine the morphology and texture of the aggregates as well as to identify the basic chemical components.
Wojciech Andrzejuk; Danuta Barnat-Hunek; Jacek Góra. Physical Properties of Mineral and Recycled Aggregates Used to Mineral-Asphalt Mixtures. Materials 2019, 12, 3437 .
AMA StyleWojciech Andrzejuk, Danuta Barnat-Hunek, Jacek Góra. Physical Properties of Mineral and Recycled Aggregates Used to Mineral-Asphalt Mixtures. Materials. 2019; 12 (20):3437.
Chicago/Turabian StyleWojciech Andrzejuk; Danuta Barnat-Hunek; Jacek Góra. 2019. "Physical Properties of Mineral and Recycled Aggregates Used to Mineral-Asphalt Mixtures." Materials 12, no. 20: 3437.
The paper describes a new model of concrete production, which contains a glass cullet. A worn-out car side window have been used for the production of recycled glass aggregate (RGA) and its properties were examined. The RGA was used in concrete as a 50% and 100% mass substitute of the traditional aggregate. Basic tests of fresh concrete mix and hardened concrete were carried out. The consistency, the air content in the concrete mix, the density of hardened concrete, water absorption, water resistance, frost resistance, and the compressive strength (after 9, 28, and 90 days) were evaluated. Composite samples were also subjected to microscopic analysis. The results showed that the RGA can be recommended as an aggregate for concretes, and the features of the RGA concrete are more favorable than those of traditional concrete. The microscopic analyses allowed us to identify the reasons for improving the properties of the RGA composites.
Maciej Szeląg; Bartosz Zegardło; Wojciech Andrzejuk. The Use of Fragmented, Worn-Out Car Side Windows as an Aggregate for Cementitious Composites. Materials 2019, 12, 1467 .
AMA StyleMaciej Szeląg, Bartosz Zegardło, Wojciech Andrzejuk. The Use of Fragmented, Worn-Out Car Side Windows as an Aggregate for Cementitious Composites. Materials. 2019; 12 (9):1467.
Chicago/Turabian StyleMaciej Szeląg; Bartosz Zegardło; Wojciech Andrzejuk. 2019. "The Use of Fragmented, Worn-Out Car Side Windows as an Aggregate for Cementitious Composites." Materials 12, no. 9: 1467.
The study on the wetting properties and surface free energy (SFE) of mineral-asphalt mixtures was presented in the paper. The composition of the two mineral-asphalt mixtures was prepared: the mixtures with dolomite and the mixtures with dolomite and recycled ceramic aggregate. The use of different aggregates results in diversification of the wetting properties in porous bituminous mixtures. The microstructure was shown based on the SEM study. The wetting properties of mineral-asphalt mixtures were determined by measuring the contact angle of their surface using water as measuring liquid. Measurements were carried out immediately after the time of application of the drops. The total surface free energy (SFE) was determined using the Neumann method. While analysing the examination results it can be noticed that the values of contact angles depends on the type of aggregate used in mixtures and the smoothness of mineral-asphalt mixtures surface. The highest contact angle was noticed for the bituminous mixture with dolomite aggregate on flat surface. The smallest contact angle with water was obtained for the mineral-asphalt mixture with dolomite and recycled ceramic aggregate on rough surface. This is due to the physical characteristics of this aggregate. Ceramic aggregate is characterized by the high absorbability. This indicates an increased wettability and adhesion properties.
Wojciech Andrzejuk; Danuta Barnat-Hunek; Stanisław Fic; Joanna Styczeń. Wettability and Surface Free Energy of Mineral-Asphalt Mixtures with Dolomite and Recycled Aggregate. IOP Conference Series: Materials Science and Engineering 2019, 471, 032011 .
AMA StyleWojciech Andrzejuk, Danuta Barnat-Hunek, Stanisław Fic, Joanna Styczeń. Wettability and Surface Free Energy of Mineral-Asphalt Mixtures with Dolomite and Recycled Aggregate. IOP Conference Series: Materials Science and Engineering. 2019; 471 (3):032011.
Chicago/Turabian StyleWojciech Andrzejuk; Danuta Barnat-Hunek; Stanisław Fic; Joanna Styczeń. 2019. "Wettability and Surface Free Energy of Mineral-Asphalt Mixtures with Dolomite and Recycled Aggregate." IOP Conference Series: Materials Science and Engineering 471, no. 3: 032011.
Wojciech Andrzejuk. Wettability and surface free energy of granodiorite, dolomite and recycled ceramic aggregate. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2019, 1 .
AMA StyleWojciech Andrzejuk. Wettability and surface free energy of granodiorite, dolomite and recycled ceramic aggregate. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST). 2019; ():1.
Chicago/Turabian StyleWojciech Andrzejuk. 2019. "Wettability and surface free energy of granodiorite, dolomite and recycled ceramic aggregate." CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) , no. : 1.
The article indicates the issue of revitalization of urban areas on the example of the former provincial city. Particular attention was paid to threats to the natural environment caused by difficulties in managing construction waste arising during this process. During the research work on waste demolition material from repairs and reconstruction of buildings, ceramic construction waste was selected. These materials were crushed and dust was generated from them. The purpose of the work was to study the activity indicator, i.e. the research that is carried out for dusts obtained, e.g. in metallurgical processes. The parameter described was a determinant of the possibility of using dust as a recyclable cement substitute in concretes and mortars. The research material was ceramic waste. The waste was picked up from the landfill and sorted. Wastes of red ceramics were isolated in the form of damaged bricks, hollow bricks and roof tiles. Dust was produced from such prepared waste. The research methodology was carried out in accordance with the standard PN-EN 450-1:2012. The activity index of crushed ceramic dust after 28 days was 60.9%, after 90 days 72%. Given the slight change in the strength parameters of mortars and special considerations of the necessity of waste utilization, the described ceramic dust recycling is considered as a solution possible to implement in the production of mortars and non-structural concretes. Introduction of the results of these works to market activities may contribute to the reduction of waste deposited on landfills.
Bartosz Zegardło; Wojciech Andrzejuk; Tomasz Drzymała; Beata Jaworska; Jerzy Nitychoruk; Daniel Tokarski. Ceramiczne odpady budowlane powstające w procesie rewitalizacji miasta – badanie możliwości ich wykorzystania jako substytutu cementu do betonów i zapraw. Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 2018, 27, 452 -462.
AMA StyleBartosz Zegardło, Wojciech Andrzejuk, Tomasz Drzymała, Beata Jaworska, Jerzy Nitychoruk, Daniel Tokarski. Ceramiczne odpady budowlane powstające w procesie rewitalizacji miasta – badanie możliwości ich wykorzystania jako substytutu cementu do betonów i zapraw. Przegląd Naukowy Inżynieria i Kształtowanie Środowiska. 2018; 27 (4):452-462.
Chicago/Turabian StyleBartosz Zegardło; Wojciech Andrzejuk; Tomasz Drzymała; Beata Jaworska; Jerzy Nitychoruk; Daniel Tokarski. 2018. "Ceramiczne odpady budowlane powstające w procesie rewitalizacji miasta – badanie możliwości ich wykorzystania jako substytutu cementu do betonów i zapraw." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 27, no. 4: 452-462.
In this study, the dynamic response of free vibration of laminated composite twisted (skewed) plate with mass variation via cutout and additional mass is investigated. The mathematical model employs cubic variation of the thickness coordinates in the displacement field. The mathematical formulation also includes the effects of transverse shear and rotatory inertia. A realistic parabolic distribution of transverse shear strains through the plate thickness is assumed and the use of the shear correction factor is avoided. A C0 finite element formulation of the mathematical model is developed to analyze the dynamic behavior of laminated composite twisted plate with cutout and additional mass. Given that no results on the present problem of free vibration of laminated composite twisted plate with cutout and additional mass are available in literature, novel results for different twist angles of laminated composite plates along with mode shapes are presented by varying the geometry, boundary conditions, and ply orientations.
Anish; Kamal Kumar Gupta; Ajay Kumar; Danuta Barnat-Hunek; Wojciech Andrzejuk. Dynamic response with mass variation of laminated composite twisted plates. Journal of Mechanical Science and Technology 2018, 32, 4145 -4152.
AMA StyleAnish, Kamal Kumar Gupta, Ajay Kumar, Danuta Barnat-Hunek, Wojciech Andrzejuk. Dynamic response with mass variation of laminated composite twisted plates. Journal of Mechanical Science and Technology. 2018; 32 (9):4145-4152.
Chicago/Turabian StyleAnish; Kamal Kumar Gupta; Ajay Kumar; Danuta Barnat-Hunek; Wojciech Andrzejuk. 2018. "Dynamic response with mass variation of laminated composite twisted plates." Journal of Mechanical Science and Technology 32, no. 9: 4145-4152.
The article presents the results of research on primary recycling properties of ceramic aggregates conducted following the procedures outlined in WT-1 2014 Aggregates - Technical Requirements. The material for the tests was obtained from a company producing sanitary ceramic products. Damaged ceramic products, coming from the factory waste heaps, were transported to the laboratory and crushed. This enabled producing aggregate that was later subjected to tests carried out on the aggregates commonly used in the production of mineral-asphalt mixes applied in making road surfaces. The factors that were examined include the following: the flow rate of fine aggregates (angularity of fine aggregate), fine particles content - methylene blue test, light-weight impurities content, frost resistance, bulk density of grains as well as water absorption determined by pycnometric method. The test results showed that the properties of the recycled aggregates are similar to those included in traditional aggregates used for the production of mineral-asphalt mixes. On the basis of the conducted analyses, the waste ceramic aggregate was recommended for use.
Wojciech Andrzejuk; Mateusz Sałuch; Bartosz Zegardlo; Elżbieta Szczygielska; Wioletta Żukiewicz-Sobczak; Paweł Sobczak; Klaudia Wołyńczuk. Properties of recycled ceramic aggregates specified in WT-1 2014 Aggregates - Technical Requirements. E3S Web of Conferences 2018, 49, 00001 .
AMA StyleWojciech Andrzejuk, Mateusz Sałuch, Bartosz Zegardlo, Elżbieta Szczygielska, Wioletta Żukiewicz-Sobczak, Paweł Sobczak, Klaudia Wołyńczuk. Properties of recycled ceramic aggregates specified in WT-1 2014 Aggregates - Technical Requirements. E3S Web of Conferences. 2018; 49 ():00001.
Chicago/Turabian StyleWojciech Andrzejuk; Mateusz Sałuch; Bartosz Zegardlo; Elżbieta Szczygielska; Wioletta Żukiewicz-Sobczak; Paweł Sobczak; Klaudia Wołyńczuk. 2018. "Properties of recycled ceramic aggregates specified in WT-1 2014 Aggregates - Technical Requirements." E3S Web of Conferences 49, no. : 00001.
This article aims to show the possible energy savings in intelligent building installations due to the use of programmable mechanical multifunctional buttons. Two monostable buttons were placed, the pressing of which triggered the entire sequence of programmed actions and procedures. The consumption of electricity from the period before and after the assembly of the buttons was compared. The measured effects of using the buttons have shown that the energy consumption has decreased by approximately 7.5 kWh per month. The low installation costs and benefits resulting from the use of such a solution make it a cost-effective and a very convenient solution.
Mateusz Sałuch; Robert Tomaszewski; Bartosz Zegardlo; Wojciech Andrzejuk; Zofia Lubańska. Mechanical multi-function buttons in intelligent building installations as a way to reduce electricity consumption. E3S Web of Conferences 2018, 49, 00095 .
AMA StyleMateusz Sałuch, Robert Tomaszewski, Bartosz Zegardlo, Wojciech Andrzejuk, Zofia Lubańska. Mechanical multi-function buttons in intelligent building installations as a way to reduce electricity consumption. E3S Web of Conferences. 2018; 49 ():00095.
Chicago/Turabian StyleMateusz Sałuch; Robert Tomaszewski; Bartosz Zegardlo; Wojciech Andrzejuk; Zofia Lubańska. 2018. "Mechanical multi-function buttons in intelligent building installations as a way to reduce electricity consumption." E3S Web of Conferences 49, no. : 00095.
The purpose of this paper is to determine the influence of the lightweight porous perlite aggregate and two widely used types of fibres on the physical and mechanical properties, frost durability and microstructure of self-compacting lightweight concrete (SCLC). The experimental investigation consisted of tests carried out on cubes and prismatic samples made of SCLC and fibres-reinforced SCLC with variable content ranging from 0.5 to 1% of basalt fibres (BF) and/or 0.5% of steel fibres (SF). In this study, two variable contents of fine perlite aggregate were used: 5% and 15%. The workability (the slump-flow and t500 values) in fresh state SCLCs have been done. Extensive data on compressive and flexural tensile strength in bending behaviour, frost resistance and the microstructure including interfacial transition zone (ITZ) were recorded and analysed. The hybrid fibres-reinforced SCLC with perlite aggregate showed a more ductile behaviour compared to that of SCLC without fibres. Fibres bridge cracks during flexural tensile strength test. BF successfully protected porous SCLC against frost attack, whereas SF succumbed to damage.
Danuta Barnat-Hunek; Jacek Góra; Wojciech Andrzejuk; Grzegorz Łagód. The Microstructure-Mechanical Properties of Hybrid Fibres-Reinforced Self-Compacting Lightweight Concrete with Perlite Aggregate. Materials 2018, 11, 1093 .
AMA StyleDanuta Barnat-Hunek, Jacek Góra, Wojciech Andrzejuk, Grzegorz Łagód. The Microstructure-Mechanical Properties of Hybrid Fibres-Reinforced Self-Compacting Lightweight Concrete with Perlite Aggregate. Materials. 2018; 11 (7):1093.
Chicago/Turabian StyleDanuta Barnat-Hunek; Jacek Góra; Wojciech Andrzejuk; Grzegorz Łagód. 2018. "The Microstructure-Mechanical Properties of Hybrid Fibres-Reinforced Self-Compacting Lightweight Concrete with Perlite Aggregate." Materials 11, no. 7: 1093.
The present study focuses on the static and dynamic response of functionally graded carbon nanotube (FG-CNT)-reinforced rhombic laminates. The cubic variation of thickness coordinate in the displacement field is considered in terms of Taylor’s series expansion, which represents the higher-order transverse cross-sectional deformation modes. The condition of zero-transverse shear strain at upper and lower surface of FG-CNT-reinforced rhombic laminates is imposed in the present formulation. The present two-dimensional model is formulated in a finite element, with the C0 element consisting of seven nodal unknowns per node. The final material properties of FG-CNT-reinforced rhombic laminates are estimated using the rule of mixture. The obtained numerical are compared with the results available in the literature to verify the reliability of the present model. The present study investigates the effect of CNT distribution, loading pattern, volume fraction, and various combinations of boundary constraints by developing a finite element code in FORTRAN.
Irfan Ansari; Ajay Kumar; Danuta Barnat-Hunek; Zbigniew Suchorab; Wojciech Andrzejuk; Dariusz Majerek. Static and Dynamic Response of FG-CNT-Reinforced Rhombic Laminates. Applied Sciences 2018, 8, 834 .
AMA StyleIrfan Ansari, Ajay Kumar, Danuta Barnat-Hunek, Zbigniew Suchorab, Wojciech Andrzejuk, Dariusz Majerek. Static and Dynamic Response of FG-CNT-Reinforced Rhombic Laminates. Applied Sciences. 2018; 8 (5):834.
Chicago/Turabian StyleIrfan Ansari; Ajay Kumar; Danuta Barnat-Hunek; Zbigniew Suchorab; Wojciech Andrzejuk; Dariusz Majerek. 2018. "Static and Dynamic Response of FG-CNT-Reinforced Rhombic Laminates." Applied Sciences 8, no. 5: 834.
This paper describes a method of designing and producing innovative mineral–asphalt mixtures, which utilize waste aggregate from the recycling of sanitary ceramics. The work presents the basic properties of the ceramic material, the investigation concerning the microstructure of the aggregate obtained from the grinding of waste, and a comparison with the images obtained for the aggregates usually employed in mineral–asphalt mixtures. The mixtures were designed for the application in the wearing course. Four series of mixtures were prepared. In the first and second, the ceramic aggregate constituted a partial substitute for dolomite, whereas in the third, we substituted granodiorite, and the fourth series contained only dolomite. The mixtures were examined for the content of soluble binder, the bulk density of samples, the presence of voids, the space filled with binder, and the susceptibility to water and frost corrosion. The obtained results were compared with the standard requirements. The microstructure as well as the contact zone in the considered mineral–asphalt mixtures are presented based on research conducted by means of a scanning electron microscope (SEM).
Wojciech Andrzejuk; Danuta Barnat-Hunek; Rafat Siddique; Bartosz Zegardło; Grzegorz Łagód. Application of Recycled Ceramic Aggregates for the Production of Mineral-Asphalt Mixtures. Materials 2018, 11, 658 .
AMA StyleWojciech Andrzejuk, Danuta Barnat-Hunek, Rafat Siddique, Bartosz Zegardło, Grzegorz Łagód. Application of Recycled Ceramic Aggregates for the Production of Mineral-Asphalt Mixtures. Materials. 2018; 11 (5):658.
Chicago/Turabian StyleWojciech Andrzejuk; Danuta Barnat-Hunek; Rafat Siddique; Bartosz Zegardło; Grzegorz Łagód. 2018. "Application of Recycled Ceramic Aggregates for the Production of Mineral-Asphalt Mixtures." Materials 11, no. 5: 658.
Subject and purpose of work: This article is a continuation of ongoing research; whose primary aim was to show ceramic waste as a full-value substrate for the production of mineral-asphalt mixtures. The authors, basing on the examined characteristics of aggregate obtained in the process of crushing the socalled “ceramic cullet”, present the thesis that this material can be a full-fledged aggregate for concretes used in road construction. The authors emphasize ecological advantages of such a solution. The purpose of this research was to analyse whether such measures as those described above are economically justifiable. Materials and methods: In the article, based on business data, the costs were estimated and compared to the prices of the aggregates used by companies producing asphalt mixtures. Results: Economic comparisons have shown that the costs of described recycling were not satisfactory. Conclusions: Taking into account the ecological effect, it is recommended that ceramic waste is recycled by using it for the production of mineral-asphalt mixes for general use.
Bartosz Zegardło; Wojciech Andrzejuk; Urszula Andrzejewicz; Jerzy Nitychoruk. Economic Aspects of Ceramic Waste Recycling through Its Use as Aggregate in Mineral-Asphalt Mixtures. Economic and Regional Studies / Studia Ekonomiczne i Regionalne 2017, 10, 74 -81.
AMA StyleBartosz Zegardło, Wojciech Andrzejuk, Urszula Andrzejewicz, Jerzy Nitychoruk. Economic Aspects of Ceramic Waste Recycling through Its Use as Aggregate in Mineral-Asphalt Mixtures. Economic and Regional Studies / Studia Ekonomiczne i Regionalne. 2017; 10 (3):74-81.
Chicago/Turabian StyleBartosz Zegardło; Wojciech Andrzejuk; Urszula Andrzejewicz; Jerzy Nitychoruk. 2017. "Economic Aspects of Ceramic Waste Recycling through Its Use as Aggregate in Mineral-Asphalt Mixtures." Economic and Regional Studies / Studia Ekonomiczne i Regionalne 10, no. 3: 74-81.