This page has only limited features, please log in for full access.

Unclaimed
Przemysław Brzyski
Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 17 August 2021 in Materials
Reads 0
Downloads 0

The aim of the research presented in the article was to check the differences in the hygro-thermal and mechanical properties of hemp-lime composites with different shives fractions, depending on the direction of mixture compaction. The research part of the paper presents the preparation method and investigation on the composites. Thermal conductivity, capillary uptake, as well as flexural and compressive strengths were examined. Additionally, an analysis of the temperature distribution in the external wall insulated with the tested composites was performed. The results confirm that the direction of compaction influences the individual properties of the composites in a similar way, depending on the size of the shives. The differences are more pronounced in the case of the composite containing longer fractions of shives. Both thermal conductivity of the material and the capillary uptake ability are lower in the parallel direction of the compaction process. Composites exhibit greater stiffness, but they fail faster with increasing loads when loaded in the direction perpendicular to compaction.

ACS Style

Przemysław Brzyski; Piotr Gleń; Mateusz Gładecki; Monika Rumińska; Zbigniew Suchorab; Grzegorz Łagód. Influence of the Direction of Mixture Compaction on the Selected Properties of a Hemp-Lime Composite. Materials 2021, 14, 4629 .

AMA Style

Przemysław Brzyski, Piotr Gleń, Mateusz Gładecki, Monika Rumińska, Zbigniew Suchorab, Grzegorz Łagód. Influence of the Direction of Mixture Compaction on the Selected Properties of a Hemp-Lime Composite. Materials. 2021; 14 (16):4629.

Chicago/Turabian Style

Przemysław Brzyski; Piotr Gleń; Mateusz Gładecki; Monika Rumińska; Zbigniew Suchorab; Grzegorz Łagód. 2021. "Influence of the Direction of Mixture Compaction on the Selected Properties of a Hemp-Lime Composite." Materials 14, no. 16: 4629.

Journal article
Published: 03 December 2020 in Materials
Reads 0
Downloads 0

The paper presents the results of research concerning three fiber materials—mineral wool, hemp fiber and wood wool—as loose-fill thermal insulation materials. The analysis used the material parameters determined in previous works conducted by the authors, such as thermal conductivity and air permeability in relation to bulk density. These materials exhibit open porosity; thus, convection is an essential phenomenon in the heat transfer process. The paper aimed at conducting thermal simulations of various frame wall variants which were filled with the above-mentioned insulation materials. The simulations were performed with the Control Volume Method using the Delphin 5.8 software. The studies accounted for the effect of wind pressure and the time of its influence on a wall insulated by means of fiber material with a thickness of 150 as well as 250 mm. The simulation enabled us to obtain such data as maximal R-value reduction and time to return to equilibrium after filtration for the analyzed materials. The study proved that heat transfer in these insulations strongly depends on the bulk density, thickness of the insulation and wind pressure. The decrease in R is reduced as the density increases. This results from the decreased air permeability characterizing the material. Wind washing causes lower R reduction than air filtration in all models. The greater the thickness, the longer it takes for the models to return to the equilibrium state following air filtration (and wind washing). This period is comparable for air filtration and wind washing. Hemp fibers were characterized with the strongest susceptibility to air filtration; in the case of wood wool, it was also high, but lower than for hemp fibers, while mineral wool was characterized with the lowest.

ACS Style

Piotr Kosiński; Przemysław Brzyski; Zbigniew Suchorab; Grzegorz Łagód. Heat Losses Caused by the Temporary Influence of Wind in Timber Frame Walls Insulated with Fibrous Materials. Materials 2020, 13, 5514 .

AMA Style

Piotr Kosiński, Przemysław Brzyski, Zbigniew Suchorab, Grzegorz Łagód. Heat Losses Caused by the Temporary Influence of Wind in Timber Frame Walls Insulated with Fibrous Materials. Materials. 2020; 13 (23):5514.

Chicago/Turabian Style

Piotr Kosiński; Przemysław Brzyski; Zbigniew Suchorab; Grzegorz Łagód. 2020. "Heat Losses Caused by the Temporary Influence of Wind in Timber Frame Walls Insulated with Fibrous Materials." Materials 13, no. 23: 5514.

Journal article
Published: 02 December 2020 in Materials
Reads 0
Downloads 0

Raw clay is used nowadays in construction as a component of mortars and plasters and as a binder in composites based on straw or shives. It is a material with good sorption properties and vapor permeability, but it is susceptible to shrinkage, is not resistant to water, and also is characterized by low mechanical strength, which makes it impossible to be used, for example, in external plasters. Various additives and admixtures are used to improve selected properties of clay mortars. The article presents the research results and assessment of the effect of glauconite clay mortar modification with an admixture of linseed oil varnish on selected properties. Admixtures in the amounts of 1%, 2%, and 3% in relation to clay weight were used. Flexural and compressive strength, water resistance, shrinkage, drying capacity, density, and porosity of mortar, were tested. The admixture of linseed oil varnish in the amounts used in the investigation had a positive effect on some of the tested properties; regardless of the quantity of the admixture, the modified mortars had better parameters concerning flexural strength, shrinkage reduction, and water resistance than the reference mortar, without admixture.

ACS Style

Przemysław Brzyski; Magdalena Grudzińska. Influence of Linseed Oil Varnish Admixture on Glauconite Clay Mortar Properties. Materials 2020, 13, 5487 .

AMA Style

Przemysław Brzyski, Magdalena Grudzińska. Influence of Linseed Oil Varnish Admixture on Glauconite Clay Mortar Properties. Materials. 2020; 13 (23):5487.

Chicago/Turabian Style

Przemysław Brzyski; Magdalena Grudzińska. 2020. "Influence of Linseed Oil Varnish Admixture on Glauconite Clay Mortar Properties." Materials 13, no. 23: 5487.

Journal article
Published: 27 November 2020 in Materials
Reads 0
Downloads 0

Different fractions of hemp shives are used in the mixtures of the hemp–lime composite. The market offers shives of different granulation. It depends on the type of industrial hemp and on the capabilities of decortication machines. The aim of the research presented in the article is to check differences in the mechanical and hygro-thermal properties of composites with different shives fractions. The research part of the paper presents the preparation method and investigation on hemp–lime composites. Apparent density, total porosity, thermal conductivity, capillary uptake, vapor permeability, specific heat, mass absorptivity, flexural and compressive strength were examined. The results confirm that the shives fraction influences the individual properties of the composites. Hemp–lime composites with fine shives are characterized by higher water absorption, thermal conductivity, mechanical strength, vapor permeability as well as lower capillary-lifting capacity and specific heat than composites with thick shives.

ACS Style

Przemysław Brzyski; Mateusz Gładecki; Monika Rumińska; Karol Pietrak; Michał Kubiś; Piotr Łapka. Influence of Hemp Shives Size on Hygro-Thermal and Mechanical Properties of a Hemp-Lime Composite. Materials 2020, 13, 5383 .

AMA Style

Przemysław Brzyski, Mateusz Gładecki, Monika Rumińska, Karol Pietrak, Michał Kubiś, Piotr Łapka. Influence of Hemp Shives Size on Hygro-Thermal and Mechanical Properties of a Hemp-Lime Composite. Materials. 2020; 13 (23):5383.

Chicago/Turabian Style

Przemysław Brzyski; Mateusz Gładecki; Monika Rumińska; Karol Pietrak; Michał Kubiś; Piotr Łapka. 2020. "Influence of Hemp Shives Size on Hygro-Thermal and Mechanical Properties of a Hemp-Lime Composite." Materials 13, no. 23: 5383.

Journal article
Published: 03 April 2020 in Materials
Reads 0
Downloads 0

The use of waste plants in the production of building materials is consistent with the principles of sustainable development. One of the ideas involves using hemp shives as an aggregate for the production of a composite used as a filling of the timber frame construction of the walls. The most important disadvantage of using the building materials based on organic components is their susceptibility to the water influence. The wall material is exposed to rising groundwater. The research part of the paper presented the preparation method and the investigation of the hemp-perlite-lime composites. Flexural and compressive strength, apparent density, total porosity, thermal conductivity, and mass absorptivity were examined. The main research part pertained to the analysis of capillary uptake occurrence in the composites, being the important phenomenon present in the external walls. The study on this phenomenon was carried out using the technique of indirect moisture evaluation—Time Domain Reflectometry (TDR). The indirect readouts were additionally verified with the traditional evaluation using the gravimetric method based on the PN-EN 1925 standard. The study proved that the tested composites were characterized by low apparent density, thermal conductivity, strength parameters, high total porosity, and mass absorptivity. The partial replacement of hemp shives by expanded perlite had a beneficial effect on the tested properties of composites.

ACS Style

Przemysław Brzyski; Zbigniew Suchorab. Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites. Materials 2020, 13, 1677 .

AMA Style

Przemysław Brzyski, Zbigniew Suchorab. Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites. Materials. 2020; 13 (7):1677.

Chicago/Turabian Style

Przemysław Brzyski; Zbigniew Suchorab. 2020. "Capillary Uptake Monitoring in Lime-Hemp-Perlite Composite Using the Time Domain Reflectometry Sensing Technique for Moisture Detection in Building Composites." Materials 13, no. 7: 1677.

Conference paper
Published: 19 December 2019 in IOP Conference Series: Materials Science and Engineering
Reads 0
Downloads 0

Timber frame walls usually require additional filling that improves their thermal insulation. Straw bales, which constitute a waste product from cereals, are a sustainable solution employed for that purpose. The temperature distribution in a wall is influenced by the heterogeneity of the partition that comprises the elements characterised by higher thermal conductivity, i.e. timber frame. Thermal bridges (i.e. thermally weaker areas) in walls are conducive to the mould growth as well as condensation; thus, it is important to take these phenomena into account at the wall designing stage. The work describes a 2D heat-transfer analysis carried out with the finite element method by means of THERM software. The analysis involved several different variants of external walls and corners. The thermal parameters of the investigated straw were derived from our former research. The obtained results were shown as the values of thermal transmittance coefficient and linear thermal transmittance equivalent to timber construction. The temperature distribution for the investigated wall was presented in a graphical form. The study also involved examining the possibility of surface condensation.

ACS Style

P Brzyski; P Kosiński; M Nadratowska. Thermal bridge occurrence in straw-bale timber frame walls. IOP Conference Series: Materials Science and Engineering 2019, 710, 012029 .

AMA Style

P Brzyski, P Kosiński, M Nadratowska. Thermal bridge occurrence in straw-bale timber frame walls. IOP Conference Series: Materials Science and Engineering. 2019; 710 (1):012029.

Chicago/Turabian Style

P Brzyski; P Kosiński; M Nadratowska. 2019. "Thermal bridge occurrence in straw-bale timber frame walls." IOP Conference Series: Materials Science and Engineering 710, no. 1: 012029.

Articles
Published: 10 October 2019 in Journal of Natural Fibers
Reads 0
Downloads 0

The paper presents the results of studies concerning raw flax shives obtained from Polish crop of flax as a loose-fill thermal insulation material. The study focusses mainly on measurements of the thermal conductivity and water vapor permeability of material, but on water absorption and capillary rise as well. The shives showed satisfactory lambda values, comparable to traditional thermal insulation materials. They also showed high mass absorptivity and the ability to uptake large amounts of water by capillary action in a short time. The paper presents also an example of the use of the tested material as thermal insulation of the flat roof. The analysis of the heat flow through the flat roof with different thicknesses of flax shives insulation was carried out.

ACS Style

Przemysław Brzyski; Piotr Kosiński; Aneta Zgliczyńska; Paweł Iwanicki; Jakub Poko. Mass Transport and Thermal Conductivity Properties of Flax Shives for Use in Construction Industry. Journal of Natural Fibers 2019, 18, 995 -1006.

AMA Style

Przemysław Brzyski, Piotr Kosiński, Aneta Zgliczyńska, Paweł Iwanicki, Jakub Poko. Mass Transport and Thermal Conductivity Properties of Flax Shives for Use in Construction Industry. Journal of Natural Fibers. 2019; 18 (7):995-1006.

Chicago/Turabian Style

Przemysław Brzyski; Piotr Kosiński; Aneta Zgliczyńska; Paweł Iwanicki; Jakub Poko. 2019. "Mass Transport and Thermal Conductivity Properties of Flax Shives for Use in Construction Industry." Journal of Natural Fibers 18, no. 7: 995-1006.

Journal article
Published: 26 July 2019 in Materials
Reads 0
Downloads 0

This article analyses the connection of the two types of floors on the ground (floors on joists and self-supporting floors), with the external wall made of a hemp-lime composite for the occurrence of thermal bridges. Several factors that may affect the heat transfer in the junction were taken into account: the level of the floor on the ground, the wall thickness, the thermal conductivity of the composite, and the location of the timber frame construction. The technology of using hemp and lime is relatively new, and there is a lack of such analyses in the literature. The two-dimensional (2D) heat-transfer in the described construction joints was analyzed based on the finite-element method with the use of the THERM 7.4 software. The results were presented as averaged and linear thermal transmittance coefficients dependent on the above mentioned factors. The possibility of surface condensation was also checked. The differences in the values of the thermal transmittance of the junction between the two variants of ground floors reached around 0.13%-1.67% and the values of linear thermal transmittance factor reached approximately 2.43%-10.13%. The junctions with the highest floor level showed a decrease in the thermal transmittance value by about 3.00%-5.77% and in the linear thermal transmittance, by about 21.98%-53.83%, compared to the junctions with the lowest floor level. Calculations showed that almost all analyzed junctions are free from surface condensation causing mould growth, because the minimum temperature factors f0.25 were higher than 0.78 (except for junctions with the lowered floor levels). The junction with a floor on the timber joists showed better thermal parameters than the junction with a self-supporting floor in each of the analyzed variants. By increasing the level of floor insulation, it is possible to limit the thermal bridges and improve the thermal properties of the junction.

ACS Style

Przemysław Brzyski; Magdalena Grudzińska; Dariusz Majerek. Analysis of the Occurrence of Thermal Bridges in Several Variants of Connections of the Wall and the Ground Floor in Construction Technology with the Use of a Hemp-lime Composite. Materials 2019, 12, 2392 .

AMA Style

Przemysław Brzyski, Magdalena Grudzińska, Dariusz Majerek. Analysis of the Occurrence of Thermal Bridges in Several Variants of Connections of the Wall and the Ground Floor in Construction Technology with the Use of a Hemp-lime Composite. Materials. 2019; 12 (15):2392.

Chicago/Turabian Style

Przemysław Brzyski; Magdalena Grudzińska; Dariusz Majerek. 2019. "Analysis of the Occurrence of Thermal Bridges in Several Variants of Connections of the Wall and the Ground Floor in Construction Technology with the Use of a Hemp-lime Composite." Materials 12, no. 15: 2392.

Proceedings article
Published: 25 July 2019 in CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST)
Reads 0
Downloads 0

Timber frame construction walls usually require additional filling that improves their thermal insulation. As a filler may be used insulating material in a loose state, such as mineral wool, cellulose, flax or hemp fibers. The temperature distribution in a wall is influenced by heterogeneity of the partition that comprises the elements characterized by higher thermal conductivity, i.e. timber frame. Thermal bridges (i.e. thermally weaker areas) in walls are conducive to the mould growth as well as condensation; thus, it is important to take these phenomena into account during wall design. The work describes a 2D heat-transfer analysis carried out with finite-element method by means of THERM software. The analysis involved a few different variants of external walls filled with hemp fibers. The thermal parameters related to the investigated hemp fibers were taken from the authors’ own research.

ACS Style

Przemysław Brzyski; Piotr Kosiński; Aneta Skoratko; Aneta Skoratko. Thermal bridges occurrence analysis in timber construction walls filled with hemp fibers. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2019, 2133, 020005 .

AMA Style

Przemysław Brzyski, Piotr Kosiński, Aneta Skoratko, Aneta Skoratko. Thermal bridges occurrence analysis in timber construction walls filled with hemp fibers. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST). 2019; 2133 (1):020005.

Chicago/Turabian Style

Przemysław Brzyski; Piotr Kosiński; Aneta Skoratko; Aneta Skoratko. 2019. "Thermal bridges occurrence analysis in timber construction walls filled with hemp fibers." CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2133, no. 1: 020005.

Proceedings article
Published: 25 July 2019 in CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST)
Reads 0
Downloads 0

Despite cellulose fibers for many years are in common use as thermal insulation, some of the properties of this material should be still investigated. The article presents the properties of cellulose fibers as an insulation material in a loose state. The analysis involved evaluation of thermal conductivity in the relation of bulk density and air permeability, the properties important for insulation materials. The results of own investigation were used to carry out the numerical simulation of heat transfer in the timber frame wall filled with cellulose fibers. The study showed that the thermal conductivity and air permeability of material depend strongly on bulk density. The results of heat transfer and temperature distribution proved that cellulose fibers are characterized by strongly air permeance, what affects on the need for additional barriers against air filtration.

ACS Style

Przemysław Brzyski; Piotr Kosiński; Aneta Skoratko; Wojciech Motacki; Aneta Skoratko. Thermal properties of cellulose fiber as insulation material in a loose state. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2019, 2133, 020006 .

AMA Style

Przemysław Brzyski, Piotr Kosiński, Aneta Skoratko, Wojciech Motacki, Aneta Skoratko. Thermal properties of cellulose fiber as insulation material in a loose state. CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST). 2019; 2133 (1):020006.

Chicago/Turabian Style

Przemysław Brzyski; Piotr Kosiński; Aneta Skoratko; Wojciech Motacki; Aneta Skoratko. 2019. "Thermal properties of cellulose fiber as insulation material in a loose state." CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2019 (CEST) 2133, no. 1: 020006.

Conference paper
Published: 14 January 2019 in MATEC Web of Conferences
Reads 0
Downloads 0

Hemp-lime composite is a thermal insulating material used as a filling in timber frame construction walls. It is a material based on the wooden part of industrial hemp stalk (hemp shives) and lime binder. In practice, different wall thicknesses, composites with different thermal properties and various configurations of timber structure are used. These factors affect the temperature distribution in the wall. In the thermally weaker areas of walls, there is a greater risk of condensation and mould growth. This issue is important while designing walls based on organic materials. The paper presents the two-dimensional (2D) heat-transfer analysis based on the finite-element method, using THERM software. Several variants of external walls were adopted for the analysis. Thermal parameters of hemp-lime composites used in the analysis were obtained from our own research. The results of the analysis were presented as the values of the thermal transmittance coefficient and linear thermal transmittance equivalent to timber construction. The temperature distribution for an exemplary wall was also shown graphically in the form of isotherms and colour-flooded isotherms.

ACS Style

Przemysław Brzyski; Sylwia Duda; Andrzej Raczkowski. Two-dimensional heat transfer analysis of timber structure walls filled with hemp-lime composite. MATEC Web of Conferences 2019, 252, 05015 .

AMA Style

Przemysław Brzyski, Sylwia Duda, Andrzej Raczkowski. Two-dimensional heat transfer analysis of timber structure walls filled with hemp-lime composite. MATEC Web of Conferences. 2019; 252 ():05015.

Chicago/Turabian Style

Przemysław Brzyski; Sylwia Duda; Andrzej Raczkowski. 2019. "Two-dimensional heat transfer analysis of timber structure walls filled with hemp-lime composite." MATEC Web of Conferences 252, no. : 05015.

Conference paper
Published: 14 January 2019 in MATEC Web of Conferences
Reads 0
Downloads 0

The paper presents experimental measurements and numerical simulation of thermal environment in naturally ventilated room by a fresh air valve. For the aim of Computer Fluid Dynamics (CFD) simulations, a model room was created. The fresh air valve is located in an occupied space, at the external wall. It has a major effect on mixing indoor and outdoor air, temperature profiles, thermal condition and indoor air quality of the rooms during the heating period. To determine the thermal condition of a naturally ventilated building, PN-EN 15251:2012 standard was used. According to the standard, using PMV/PPD is suitable for evaluating the thermal environment. In the naturally ventilated buildings, the following criteria are very important for local thermal discomfort: draught, radiant temperature asymmetry and vertical air temperature differences. To compare the simulation results, real air temperatures were measured by the thermocouples in a day room having the same geometry. A series of simulations has been carried out to determine the profiles of temperature and velocity of indoor air. Obtained results prove correlation with calculations of profiles of indoor air temperature, estimated using the thermocouples.

ACS Style

Andrzej Raczkowski; Zbigniew Suchorab; Przemysław Brzyski. Computational fluid dynamics simulation of thermal comfort in naturally ventilated room. MATEC Web of Conferences 2019, 252, 04007 .

AMA Style

Andrzej Raczkowski, Zbigniew Suchorab, Przemysław Brzyski. Computational fluid dynamics simulation of thermal comfort in naturally ventilated room. MATEC Web of Conferences. 2019; 252 ():04007.

Chicago/Turabian Style

Andrzej Raczkowski; Zbigniew Suchorab; Przemysław Brzyski. 2019. "Computational fluid dynamics simulation of thermal comfort in naturally ventilated room." MATEC Web of Conferences 252, no. : 04007.

Journal article
Published: 17 December 2018 in Materials
Reads 0
Downloads 0

This paper presents the results of research aimed at finding the possible ways of disposing of ceramic waste material, focusing mainly on the possibility of using it as aggregates in concretes exposed to an aggressive chemical environment (municipal sewage). The research part presents the preparation method and investigation of waste ceramic aggregates (red, glazed and sanitary ceramic aggregates). A suitable ratio of coarse to fine aggregates was selected, and their density, absorptivity and crushing strength were examined. All examined aggregates were also subjected to SEM analysis. Red ceramic aggregate is characterized by a greater degree of crushing compared to glazed and sanitary ceramic aggregate, by 205.7% and 439.4%, respectively. Another part of the research was to compare the properties of concrete with traditional aggregate (gravel, basalt) and with ceramic waste aggregate. The tested parameters included consistency, apparent density, absorptivity, flexural and compressive strengths of concretes. The study proved that the absorptivity of recycled composites is higher than that of traditional composites by 20.8–24.7%. The concrete based on sanitary ceramic waste has the highest strength parameters. Its compressive strength is higher by 10.5% and flexural strength by 5.9% compared with the basalt aggregate concrete. The compressive strength of sanitary ceramics concrete is higher by 42% and by 59% compared with concrete based on glazed ceramic and red ceramic aggregate, respectively. The last part of the research was to examine the resistance of concrete to aggressive environment. The scope of the work included the preparation of the research environment in the form of solutions with an increased concentration of aggressive agents (hydronium, sulfate, magnesium, ammonium ions). Among the concretes with ceramic aggregate, the highest decrease in the compressive strength was demonstrated by the concrete based on red ceramics (128.2%), while the smallest was demonstrated by the concrete based on sanitary ceramics (aggregate from sanitary ceramics (15.4%). The mass loss at different time intervals and compressive strength loss of samples stored in solutions were tested. The smallest weight loss caused by aggressive environment attack was recorded in the concrete based on ceramic sanitary and glazed aggregate (20.2% and 34.5%, respectively, after 120 days of aggressive environment).

ACS Style

Bartosz Zegardło; Przemysław Brzyski; Katarzyna Rymuza; Antoni Bombik. Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste. Materials 2018, 11, 2565 .

AMA Style

Bartosz Zegardło, Przemysław Brzyski, Katarzyna Rymuza, Antoni Bombik. Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste. Materials. 2018; 11 (12):2565.

Chicago/Turabian Style

Bartosz Zegardło; Przemysław Brzyski; Katarzyna Rymuza; Antoni Bombik. 2018. "Analysis of the Effects of Aggressive Environments Simulating Municipal Sewage on Recycled Concretes Based on Selected Ceramic Waste." Materials 11, no. 12: 2565.

Conference paper
Published: 13 August 2018 in E3S Web of Conferences
Reads 0
Downloads 0

Hydrated lime, due to its life cycle (return to the natural form as a result of binding and hardening) shows a positive ecological aspect. The binder is often used in building materials based on plant components due to the high alkaline reaction and low diffusion resistance, as well as in mortars and plasters. However, it is an air binder with low strength parameters and the process of its binding and hardening is long-lasting. One of the ways to accelerate the binding processes and also to increase the strength of the binder is the use of additives in the form of pozzolanic materials which react with calcium hydroxide and form compounds with hydraulic properties. These are natural materials or industrial waste, so they do not affect the environmental impact of lime binder. The article presents the influence of the addition of pozzolan (three types) in various weight amounts, on the strength properties of mortars, their absorbability and capillary rise (presented as water absorption coefficient). The influence of pozzolan presence on workability of fresh mortars - their consistency was also checked.

ACS Style

Przemysław Brzyski. The effect of pozzolan addition on the physical and mechanical properties of lime mortar. E3S Web of Conferences 2018, 49, 00009 .

AMA Style

Przemysław Brzyski. The effect of pozzolan addition on the physical and mechanical properties of lime mortar. E3S Web of Conferences. 2018; 49 ():00009.

Chicago/Turabian Style

Przemysław Brzyski. 2018. "The effect of pozzolan addition on the physical and mechanical properties of lime mortar." E3S Web of Conferences 49, no. : 00009.

Conference paper
Published: 13 August 2018 in E3S Web of Conferences
Reads 0
Downloads 0

One of the objectives of sustainable development in construction is the use of low-processed materials. They have a positive impact on the ecological balance of the building throughout the entire life cycle. Examples of such materials are materials of plant origin - straw, shives, cellulose fibers. They are used as thermal insulation or wall material. In recent years, hemp shives are increasingly used as a component of a lime-based composite, which performs the function of wall filling in timber frame constructions. The shives, due to the high porosity, determine the high thermal insulation properties of the composite. The physico-mechanical properties of the composite can be modified depending on various factors, including the ratio of hemp shives to the binder. The lime binder, in turn, can be modified by hydraulic and pozzolan additives. The paper presents mechanical properties (compressive and flexural strength) as well as physical properties (density, porosity, thermal conductivity coefficient, absorbability) of composites with various proportions of hemp shives of the Bialobrzeskie variety to the lime binder modified with Portland cement and metakaolinite.

ACS Style

Przemysław Brzyski; Grzegorz Łagód. Physical and mechanical properties of composites based on hemp shives and lime. E3S Web of Conferences 2018, 49, 00010 .

AMA Style

Przemysław Brzyski, Grzegorz Łagód. Physical and mechanical properties of composites based on hemp shives and lime. E3S Web of Conferences. 2018; 49 ():00010.

Chicago/Turabian Style

Przemysław Brzyski; Grzegorz Łagód. 2018. "Physical and mechanical properties of composites based on hemp shives and lime." E3S Web of Conferences 49, no. : 00010.

Conference paper
Published: 18 July 2018 in AIP Conference Proceedings
Reads 0
Downloads 0

Aerated concrete is an artificial building material which shows anisotropic features. This is mainly caused by the technology of its production, where the aluminium powder as the expansive agent creates macro-pores that may differ in shape, dimension and configuration. Material anisotropy is caused by the orientation of the air-gaps in the structure of the mortar matrix. Directional configuration of the pores influences the processes of transport of water, air, vapor and heat through the building barriers. Presented research is an approach to determine the influence of direction of heat and water flow through the anisotropic material. Water flow characteristics depending on direction has been evaluated using technique of indirect moisture determination – Time Domain Reflectometry. Thermal conductivity coefficient differences in dependence on direction has been evaluated using stationary method.

ACS Style

Zbigniew Suchorab; Przemysław Brzyski; Andrzej Raczkowski; Monika Garbacz; Anna Życzyńska. Laboratory determination of hygric and thermal anisotropy of aerated concrete. AIP Conference Proceedings 2018, 1988, 020045 .

AMA Style

Zbigniew Suchorab, Przemysław Brzyski, Andrzej Raczkowski, Monika Garbacz, Anna Życzyńska. Laboratory determination of hygric and thermal anisotropy of aerated concrete. AIP Conference Proceedings. 2018; 1988 (1):020045.

Chicago/Turabian Style

Zbigniew Suchorab; Przemysław Brzyski; Andrzej Raczkowski; Monika Garbacz; Anna Życzyńska. 2018. "Laboratory determination of hygric and thermal anisotropy of aerated concrete." AIP Conference Proceedings 1988, no. 1: 020045.

Proceedings article
Published: 18 July 2018 in THERMOPHYSICS 2018: 23rd International Meeting of Thermophysics 2018
Reads 0
Downloads 0

The use of natural building materials is consistent with the principles of sustainable development in the building sector. One of the natural and unprocessed materials used in construction is clay. This raw material is used in a natural form as a binder in plasters, mortars and in composites based on organic fillers. In order to improve the thermal insulation properties of building partition, lightweight aggregates such as expanded perlite, expanded clay or foam glass are often used instead of sand aggregates in mortars and plasters. The disadvantage of clay is the lack of resistance to water, which limits the use of clay plasters from the outside of external walls. The water resistances to water can be improved by using appropriate additives or admixtures. The article presents the research results and analysis of physical properties of clay mortars based on insulating aggregate (granulated foam glass). The effect of the aggregate fraction on apparent density, thermal conductivity of mortars was investigated. The influence of the use of additives and admixtures (casein and linseed oil varnish) on the resistance of clay mortars to water using the washing test and weight loss after immersion in water was also evaluated.

ACS Style

Przemysław Brzyski; Zbigniew Suchorab. Physical properties of clay mortars based on insulating aggregates. THERMOPHYSICS 2018: 23rd International Meeting of Thermophysics 2018 2018, 1988, 020007 .

AMA Style

Przemysław Brzyski, Zbigniew Suchorab. Physical properties of clay mortars based on insulating aggregates. THERMOPHYSICS 2018: 23rd International Meeting of Thermophysics 2018. 2018; 1988 (1):020007.

Chicago/Turabian Style

Przemysław Brzyski; Zbigniew Suchorab. 2018. "Physical properties of clay mortars based on insulating aggregates." THERMOPHYSICS 2018: 23rd International Meeting of Thermophysics 2018 1988, no. 1: 020007.

Original articles
Published: 25 May 2018 in Journal of Natural Fibers
Reads 0
Downloads 0

The paper presents the results of research concerning three fiber materials – hemp fiber, cellulose fiber and mineral wool as a loose-fill thermal insulation materials. It focused on the study of moisture properties and wettability of these materials. The analysis involved evaluation of moisture sorption in different relative humidity conditions and evaluation of wettability of fibers by contact angle measurement. The study showed that the sorption equilibrium has been achieved at different times, which proves the various nature and properties of the materials. Hemp fibers were less wet than cellulose fiber, but the time needed to stabilize was shorter. The largest contact angles, indicating the strongly hydrophobic properties, were shown by mineral wool. Some samples of hemp and cellulose fibers were characterized by similar contact angles providing high wetting properties.

ACS Style

Piotr Kosiński; Przemysław Brzyski; Barbara Duliasz. Moisture and wetting properties of thermal insulation materials based on hemp fiber, cellulose and mineral wool in a loose state. Journal of Natural Fibers 2018, 17, 199 -213.

AMA Style

Piotr Kosiński, Przemysław Brzyski, Barbara Duliasz. Moisture and wetting properties of thermal insulation materials based on hemp fiber, cellulose and mineral wool in a loose state. Journal of Natural Fibers. 2018; 17 (2):199-213.

Chicago/Turabian Style

Piotr Kosiński; Przemysław Brzyski; Barbara Duliasz. 2018. "Moisture and wetting properties of thermal insulation materials based on hemp fiber, cellulose and mineral wool in a loose state." Journal of Natural Fibers 17, no. 2: 199-213.

Journal article
Published: 03 September 2017 in Journal of Natural Fibers
Reads 0
Downloads 0
ACS Style

Piotr Kosiński; Przemysław Brzyski; Aneta Szewczyk; Wojciech Motacki. Thermal Properties of Raw Hemp Fiber as a Loose-Fill Insulation Material. Journal of Natural Fibers 2017, 15, 717 -730.

AMA Style

Piotr Kosiński, Przemysław Brzyski, Aneta Szewczyk, Wojciech Motacki. Thermal Properties of Raw Hemp Fiber as a Loose-Fill Insulation Material. Journal of Natural Fibers. 2017; 15 (5):717-730.

Chicago/Turabian Style

Piotr Kosiński; Przemysław Brzyski; Aneta Szewczyk; Wojciech Motacki. 2017. "Thermal Properties of Raw Hemp Fiber as a Loose-Fill Insulation Material." Journal of Natural Fibers 15, no. 5: 717-730.

Journal article
Published: 12 July 2017 in Budownictwo i Architektura
Reads 0
Downloads 0

Proper design of the building component, which not only meets the legal requirements, but also provides comfort of using of buildings, requires knowledge of the materials and solutions. Since moisture is one of the main factors that can affect the building structure destruction, it is particularly important to be aware of hygrothermal properties of components. And this is the focus of the study. In this paper several variants of external walls were analysed, according to the requirements in terms of: heat transfer coefficient U, the risk of surface and interstitial condensation. Partitions were designed with composite based on shives from industrial hemp and lime binder, which is not yet widely used in Poland. The purpose of the analysis of this material was to prove the validity of using the natural materials in residential buildings.

ACS Style

Anna Alberska; Przemysław Brzyski. Analysis of the distribution of temperature and humidity in different variants of external walls made of hemp-lime composite. Budownictwo i Architektura 2017, 16, 141 -151.

AMA Style

Anna Alberska, Przemysław Brzyski. Analysis of the distribution of temperature and humidity in different variants of external walls made of hemp-lime composite. Budownictwo i Architektura. 2017; 16 (2):141-151.

Chicago/Turabian Style

Anna Alberska; Przemysław Brzyski. 2017. "Analysis of the distribution of temperature and humidity in different variants of external walls made of hemp-lime composite." Budownictwo i Architektura 16, no. 2: 141-151.