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Tereza Pavlů
Research Team Architecture and the Environment, University Centre for Energy Efficient Buildings of Czech Technical University in Prague, Trinecka 1024, 273 43 Bustehrad, Czech Republic

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Journal article
Published: 10 August 2021 in Materials
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This paper deals with the possibility of using different types of waste glass powder in high-performance concrete (HPC) mixtures as a fine fraction replacement. Subsequently, both fractions are used in this research in concrete as a substitute for fine sand and silica flour. To use waste glass in a basic building material such as concrete, it is necessary to verify the basic chemical properties of the selected waste materials. Apart from the basic chemical properties, its environmental impact also appears to be an essential property of waste materials in general. Therefore, the research is mainly focused on the leaching and ecotoxicity experiments on high-performance concrete. HPC mixtures are designed based on the results of the analyzed chemical properties and previous research performed by our research team. Ecotoxicity of these concretes is then verified using Czech standards to evaluate. The results showed a positive impact on the ecotoxic properties of waste glass when used in concrete. A new ecotoxicity classification of waste materials and concrete mixes containing waste materials is proposed as a result of this research and summarized in the conclusion of this paper.

ACS Style

Diana Mariaková; Klára Mocová; Kristina Fořtová; Tereza Pavlů; Petr Hájek. Waste Glass Powder Reusability in High-Performance Concrete: Leaching Behavior and Ecotoxicity. Materials 2021, 14, 4476 .

AMA Style

Diana Mariaková, Klára Mocová, Kristina Fořtová, Tereza Pavlů, Petr Hájek. Waste Glass Powder Reusability in High-Performance Concrete: Leaching Behavior and Ecotoxicity. Materials. 2021; 14 (16):4476.

Chicago/Turabian Style

Diana Mariaková; Klára Mocová; Kristina Fořtová; Tereza Pavlů; Petr Hájek. 2021. "Waste Glass Powder Reusability in High-Performance Concrete: Leaching Behavior and Ecotoxicity." Materials 14, no. 16: 4476.

Journal article
Published: 19 January 2021 in Materials
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This article deals with the possibility of utilization of secondary-raw materials as a natural sand replacement in concrete. Four types of waste construction materials were examined—recycled aggregate from four different sources. The natural aggregate was examined as well as used as the reference sample. All the samples were tested to evaluate the water absorption, particle size distribution, and particle density. The basic chemical reactions in the view of ecotoxicology are investigated and measured based on Czech standards. Chemical analysis, Lemna growth inhibition test, freshwater algae, daphnia acute, and mustard germination toxicity test were made and discussed in this paper. Based on the physical and geometrical properties and ecotoxicology of examined waste materials, this work evaluated them as suitable for utilization in concrete as a sand replacement.

ACS Style

Diana Mariaková; Klára Anna Mocová; Kristina Fořtová; Pavla Ryparová; Jan Pešta; Tereza Pavlů. Ecotoxicity and Essential Properties of Fine-Recycled Aggregate. Materials 2021, 14, 463 .

AMA Style

Diana Mariaková, Klára Anna Mocová, Kristina Fořtová, Pavla Ryparová, Jan Pešta, Tereza Pavlů. Ecotoxicity and Essential Properties of Fine-Recycled Aggregate. Materials. 2021; 14 (2):463.

Chicago/Turabian Style

Diana Mariaková; Klára Anna Mocová; Kristina Fořtová; Pavla Ryparová; Jan Pešta; Tereza Pavlů. 2021. "Ecotoxicity and Essential Properties of Fine-Recycled Aggregate." Materials 14, no. 2: 463.

Journal article
Published: 01 December 2020 in Materials
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The use of recycled masonry aggregate for concrete is mostly limited by the worse properties in comparison with natural aggregate. For these reasons it is necessary to find ways to improve the quality of recycled masonry aggregate concrete and make it more durable. One possibility is utilization of crystalline admixture which was verified in this study by laboratory measurements of key material properties and durability. The positive influence of mineral admixture was proved for freeze-thaw resistance. The positive impact to carbonation resistance was not unambiguous. In conclusion, the laboratory evaluation shows how to improve the durability of recycled masonry aggregate concrete, however, it is necessary to investigate more about this topic.

ACS Style

Tereza Pavlů; Kristina Fořtová; Jakub Řepka; Diana Mariaková; Jiří Pazderka. Improvement of the Durability of Recycled Masonry Aggregate Concrete. Materials 2020, 13, 5486 .

AMA Style

Tereza Pavlů, Kristina Fořtová, Jakub Řepka, Diana Mariaková, Jiří Pazderka. Improvement of the Durability of Recycled Masonry Aggregate Concrete. Materials. 2020; 13 (23):5486.

Chicago/Turabian Style

Tereza Pavlů; Kristina Fořtová; Jakub Řepka; Diana Mariaková; Jiří Pazderka. 2020. "Improvement of the Durability of Recycled Masonry Aggregate Concrete." Materials 13, no. 23: 5486.

Journal article
Published: 20 February 2020 in Sustainability
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For a sustainable building industry, reusable construction with a low demand for primary resources is needed. Moreover, if we want to reduce the amount of construction and demolition waste, construction with recycled aggregate should be considered. To investigate the environmental impacts of such concrete construction, life cycle assessment (LCA) was used to compare the following types of concrete construction: Reusable blocks with recycled brick aggregate, reusable blocks with recycled concrete, reusable blocks with natural aggregate, and regular concrete wall. Firstly, the properties of new concrete with recycled aggregate were measured, such as physical, mechanical, and thermal properties. Then, different constructions were designed and assessed using the method of Institute of Environmental Sciences (CML2001) and the method of National Institute for Public Health and the Environment (ReCiPe 2016) as characterization methods. Unsurprisingly, the regular concrete wall had a higher impact on most of the impact categories, e.g., 113 kg CO2 eq. (in the first scenario, using CML2001). In accordance with the circular principles, the reusability of blocks and recycling of aggregate are the main factors that affect the environmental impact of the constructions. Thus, the global warming potential (GWP) of construction with reusable recycled concrete blocks was only 53 kg CO2 eq. (in the second scenario). Moreover, we show differences in the results of CML2001 and ReCiPe 2016, e.g., in the Photochemical Oxidant Creation category.

ACS Style

Jan Pešta; Tereza Pavlů; Kristina Fořtová; Vladimír Kočí. Sustainable Masonry Made from Recycled Aggregates: LCA Case Study. Sustainability 2020, 12, 1581 .

AMA Style

Jan Pešta, Tereza Pavlů, Kristina Fořtová, Vladimír Kočí. Sustainable Masonry Made from Recycled Aggregates: LCA Case Study. Sustainability. 2020; 12 (4):1581.

Chicago/Turabian Style

Jan Pešta; Tereza Pavlů; Kristina Fořtová; Vladimír Kočí. 2020. "Sustainable Masonry Made from Recycled Aggregates: LCA Case Study." Sustainability 12, no. 4: 1581.

Journal article
Published: 05 November 2019 in Sustainability
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The main goal of this study was to compare two use cycles of natural aggregate concrete and recycled aggregate concrete, which is another way to compare the environmental impacts of recycled materials. A series of concrete mixtures with various replacement ratios of primary resources with recycled ones were prepared for this study. The mechanical properties of concrete mixtures were examined and were used for the design of structural elements in the same utilized properties. The two use cycles of a structural element were compared using life cycle assessment (LCA). In the first use cycle, the LCA of the structural element containing only primary raw materials was assessed. In the second use cycle, the LCA of a structural element in which primary materials were partially replaced by recycled ones was assessed. The obtained results confirm the potential use of high-quality recycled aggregate originating from local sources in some applications in building structures. Furthermore, the environmental assessment indicates the benefits of using recycled materials, such as environmental savings, especially the reduction of primary resource use, embodied energy, and embodied emissions, as well as reduction of the pressure on landfill sites.

ACS Style

Tereza Pavlů; Vladimír Kočí; Petr Hájek. Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete. Sustainability 2019, 11, 6185 .

AMA Style

Tereza Pavlů, Vladimír Kočí, Petr Hájek. Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete. Sustainability. 2019; 11 (21):6185.

Chicago/Turabian Style

Tereza Pavlů; Vladimír Kočí; Petr Hájek. 2019. "Environmental Assessment of Two Use Cycles of Recycled Aggregate Concrete." Sustainability 11, no. 21: 6185.

Conference paper
Published: 21 June 2019 in IOP Conference Series: Earth and Environmental Science
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The main objective of the present project for the Czech government was to create a catalogue of construction products and materials which contain recycled content from construction and demolition waste. The motivation for the work was to support a higher utilization of construction products with the content of secondary raw materials in the Czech Republic. It was designed for architects, designers, civil engineers, construction contractors and public and private investors. The catalogue provides an overview of products with recycled content, a list of valid requirements on the utilization of recycled materials listed in standards and legislation. Examples of good practice are presented to break the existing psychologic barriers to the use of secondary raw materials in the Czech construction industry. This contribution summarizes the findings in the field of the recycling of construction and demolition waste and its further use as produced secondary raw materials in the construction industry.

ACS Style

T Pavlů; J Pešta; M Volf; A Lupíšek. Catalogue of Construction Products with Recycled Content from Construction and Demolition Waste. IOP Conference Series: Earth and Environmental Science 2019, 290, 012025 .

AMA Style

T Pavlů, J Pešta, M Volf, A Lupíšek. Catalogue of Construction Products with Recycled Content from Construction and Demolition Waste. IOP Conference Series: Earth and Environmental Science. 2019; 290 (1):012025.

Chicago/Turabian Style

T Pavlů; J Pešta; M Volf; A Lupíšek. 2019. "Catalogue of Construction Products with Recycled Content from Construction and Demolition Waste." IOP Conference Series: Earth and Environmental Science 290, no. 1: 012025.

Journal article
Published: 14 June 2019 in Materials
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The main aim of this paper is to carry out the environmentally based enhancement of a concrete mixture containing recycled materials whilst considering natural resource consumption as well as mechanical and thermal property levels. The developed concrete is intended to be used in mortarless masonry wall structures. Ten concrete mixtures with different types and replacement rates of recycled masonry aggregate and recycled expanded polystyrene were prepared, and their mechanical and thermal properties were experimentally investigated. It was found that the use of recycled masonry aggregate led to better thermal properties while maintaining sufficient mechanical properties. On the contrary, the addition of recycled expanded polystyrene did not significantly affect the thermal properties of concrete, but the mechanical properties considerably declined. For this reason, the recycled masonry aggregate is suitable to use as an aggregate for concrete masonry blocks for wall structures.

ACS Style

Tereza Pavlu; Kristina Fortova; Jakub Divis; Petr Hajek. The Utilization of Recycled Masonry Aggregate and Recycled EPS for Concrete Blocks for Mortarless Masonry. Materials 2019, 12, 1923 .

AMA Style

Tereza Pavlu, Kristina Fortova, Jakub Divis, Petr Hajek. The Utilization of Recycled Masonry Aggregate and Recycled EPS for Concrete Blocks for Mortarless Masonry. Materials. 2019; 12 (12):1923.

Chicago/Turabian Style

Tereza Pavlu; Kristina Fortova; Jakub Divis; Petr Hajek. 2019. "The Utilization of Recycled Masonry Aggregate and Recycled EPS for Concrete Blocks for Mortarless Masonry." Materials 12, no. 12: 1923.

Journal article
Published: 01 January 2019 in Entecho
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Recyklací stavebního a demoličního odpadu jsou produkovány materiály, které mohou být využity jako náhrada primárních surovin. Tyto recyklační procesy ale mohou být energeticky náročné, a proto je nutné posuzovat environmentální dopady takových procesů. Posuzovali jsme environmentální dopady recyklovaného betonového a cihelného kameniva a také environmentální dopady produktů s recyklovaným obsahem. Metoda Posuzování životního cyklu byla použita jako analytický nástroj pro vyhodnocení environmentálních dopadů recyklovaných materiálů (1 t betonového a cihelného kameniva), výrobků (1 m3 betonových směsí s obsahem recyklátu) a konstrukcí (tvarovek a základů budov). Také byly diskutovány vlivy na životní prostředí jako je ekotoxicita betonových výrobků, následky omezení skládkování a karbonatace. Prezentujeme výsledky posuzování environmentálních dopadů s cílem ukázat, jaký dopad má vybraná funkce recyklovaného produktu. Navrhujeme posuzovat environmentální dopady recyklovaného kameniva s ohledem na jeho použití v budoucnu. ------------- Recycling of construction and demolition waste produce materials, which can be used as primary resources replacement. However, these recycling processes can be very energy consuming and therefore environmental impacts of such processes should be considered. We assessed environmental impacts of recycled concrete and brick aggregates and also environmental impacts of products with recycled content. The Life Cycle Assessment method was used as analytical tool for evaluating environmental impacts of recycled materials (1 t of concrete or brick aggregates), products (1 m3 recycled concrete mixtures) and constructions (blocks and building foundations). Also, various effects on environment were discussed such as ecotoxicity of concrete products, the consequence of landfilling limitations and carbonation effect. We present the results of environmental impacts assessments to show, what influence the chosen function of recycled product has. We suggest to assess environmental impacts of recycled aggregates considering their future function.

ACS Style

Jan Pešta; Tereza Pavlů; Klára Anna Mocová; Vladimír Kočí. Posuzování recyklovaného betonu z hlediska jeho dopadu na životní prostředí. Entecho 2019, 2, 1 -11.

AMA Style

Jan Pešta, Tereza Pavlů, Klára Anna Mocová, Vladimír Kočí. Posuzování recyklovaného betonu z hlediska jeho dopadu na životní prostředí. Entecho. 2019; 2 (2):1-11.

Chicago/Turabian Style

Jan Pešta; Tereza Pavlů; Klára Anna Mocová; Vladimír Kočí. 2019. "Posuzování recyklovaného betonu z hlediska jeho dopadu na životní prostředí." Entecho 2, no. 2: 1-11.

Review
Published: 27 November 2018 in IOP Conference Series: Materials Science and Engineering
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The utilization of recycled materials is one of the seven principles of sustainable construction. These principles based on the efficient use of resources were defined by the International Council of Building in 1994. Recycled materials such as recycled concrete aggregate or recycled brick aggregate from construction and demolition waste, waste glass from municipal waste or recycled waste gypsum from gypsum boards are able to use as replacement of primary raw materials in cement and concrete production. Concrete and cement production totally depends on the natural resources. The world production of concrete has been twelve times increased during last six decades. Nowadays, nearly one ton of concrete is produced each year for every human being in the world on average. On one hand, the use of recycled materials in cement and concrete production helps to reduce raw materials and urban land occupation. However, on the other hand, the recycled materials used as partial replacement of raw materials influence properties of final product. This paper reviews the different uses of recycled materials in cement and concrete production and the effect of the properties of these materials to the cement and concrete quality.

ACS Style

Tereza Pavlů. The Utilization of Recycled Materials for Concrete and Cement Production- A Review. IOP Conference Series: Materials Science and Engineering 2018, 442, 012014 .

AMA Style

Tereza Pavlů. The Utilization of Recycled Materials for Concrete and Cement Production- A Review. IOP Conference Series: Materials Science and Engineering. 2018; 442 (1):012014.

Chicago/Turabian Style

Tereza Pavlů. 2018. "The Utilization of Recycled Materials for Concrete and Cement Production- A Review." IOP Conference Series: Materials Science and Engineering 442, no. 1: 012014.

Journal article
Published: 01 March 2017 in Advanced Materials Research
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This paper is focused on the durability of recycled aggregate (FRA) concrete. The durability of FRA concrete is connected with many uncertainties and doubts. This paper presents results of long-term of compressive strength, freeze – thaw resistance and carbonation depth of FRA concrete. The FRA was originated from crushed old concrete structures. There were prepared a total four concrete mixture. The first mixture was reference with natural sand. In other concrete mixtures, natural sand was replaced by the FRA in various replacement ratios, specifically 10 %, 20 % and 30 %. All prepared concrete mixtures were designated with the same parameters for clear comparison. It is possible to say that according to the durability, the FRA concrete is possible to used in the same applications as conventional concrete. However it is necessary to verify this results.

ACS Style

Magdaléna Šefflová; Tereza Pavlů. The Durability of Fine Recycled Aggregate Concrete. Advanced Materials Research 2017, 1144, 59 -64.

AMA Style

Magdaléna Šefflová, Tereza Pavlů. The Durability of Fine Recycled Aggregate Concrete. Advanced Materials Research. 2017; 1144 ():59-64.

Chicago/Turabian Style

Magdaléna Šefflová; Tereza Pavlů. 2017. "The Durability of Fine Recycled Aggregate Concrete." Advanced Materials Research 1144, no. : 59-64.

Journal article
Published: 01 December 2016 in Key Engineering Materials
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The main aim of this contribution is verification of durability properties of concrete with partial replacement of cement by recycled cement powder (RCP) sourced from pure waste concrete. The main topic of this article is the study of influence of partial replacement of cement by RCP to the carbonation resistance of fine aggregate concrete with partial replacement of cement. The compressive strength, tensile strength in bending and depth of carbonation were tested after 56 days of CO2 curing. Partial replacement of cement was 0, 5, 10 and 15 % for all these tests. The properties were investigated by using prismatic specimens.

ACS Style

Tereza Pavlů; Magdaléna Šefflová. Carbonation Resistance of Fine Aggregate Concrete with Partial Replacement of Cement. Key Engineering Materials 2016, 722, 201 -206.

AMA Style

Tereza Pavlů, Magdaléna Šefflová. Carbonation Resistance of Fine Aggregate Concrete with Partial Replacement of Cement. Key Engineering Materials. 2016; 722 ():201-206.

Chicago/Turabian Style

Tereza Pavlů; Magdaléna Šefflová. 2016. "Carbonation Resistance of Fine Aggregate Concrete with Partial Replacement of Cement." Key Engineering Materials 722, no. : 201-206.

Journal article
Published: 01 December 2016 in Key Engineering Materials
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This paper is focused on carbonation resistance of fine recycled aggregate (FRA) concrete. Durability of FRA concrete is connected with uncertainties and doubts. One of the most unknown aspects of FRA cocnrete is carbonation resistance. This paper presents results of carbonation depth of FRA concrete. The FRA was originated from crushed construction and demolition (C&D) waste. There were prepared a total four concrete mixture. The first mixture was reference, did not include the FRA. In other concrete mixtures, natural sand was replaced by the FRA in various replacement ratios, specifically 10%, 20% and 30%. All prepared concrete mixtures were designated with the same parameters for clear comparison. From the test results it is possible to say that the use of the FRA as partial replacement of natural sand in concrete influences carbonation resistance of concrete. The carbonation depth was higher for concrete samples with the use of FRA. However it is possible to say that according to the carbonation resistance, the FRA concrete is possible to be used in the same applications as conventional concrete but it is necessary to verify this results.

ACS Style

Magdaléna Šefflová; Tereza Pavlů. The Carbonation Depth of Fine Recycled Aggregate Concrete. Key Engineering Materials 2016, 722, 228 -232.

AMA Style

Magdaléna Šefflová, Tereza Pavlů. The Carbonation Depth of Fine Recycled Aggregate Concrete. Key Engineering Materials. 2016; 722 ():228-232.

Chicago/Turabian Style

Magdaléna Šefflová; Tereza Pavlů. 2016. "The Carbonation Depth of Fine Recycled Aggregate Concrete." Key Engineering Materials 722, no. : 228-232.

Journal article
Published: 01 April 2016 in Solid State Phenomena
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This investigation is focused on possibility of partial cement replacement in concrete mixture and its environmental assessment. The cement in concrete mixture is replaced by recycled cement powder from modified construction and demolition (C&D) waste. Recycled cement powder were prepared in laboratory from C&D waste of high quality road concrete. The main goal of this investigation is optimize amount of recycled cement powder used as partial replacement of cement in concrete mixture according to mechanical, deformation and physical properties of concrete and environmental impact. The properties of the fine-aggregate concrete with partial replacement of cement by recycled cement powder were tested for this verification. The life cycle analysis was calculated for this optimization. The properties and environmental assessment of the fine-aggregate concrete with partial replacement of fine aggregate by fine recycled aggregate were examined for comparison.

ACS Style

Tereza Pavlů; Vladimír Kočí; Magdaléna Šefflová. Study Replacement of Cement with Recycled Cement Powder and the Environmental Assessment. Solid State Phenomena 2016, 249, 136 -141.

AMA Style

Tereza Pavlů, Vladimír Kočí, Magdaléna Šefflová. Study Replacement of Cement with Recycled Cement Powder and the Environmental Assessment. Solid State Phenomena. 2016; 249 ():136-141.

Chicago/Turabian Style

Tereza Pavlů; Vladimír Kočí; Magdaléna Šefflová. 2016. "Study Replacement of Cement with Recycled Cement Powder and the Environmental Assessment." Solid State Phenomena 249, no. : 136-141.

Journal article
Published: 01 February 2016 in Applied Mechanics and Materials
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This study deals with determination of the physical properties of fine-aggregate concrete with partial replacement of cement in concrete mixture. Cement was replaced by recycled cement powder originating from construction and demolition waste. The main goal of this study is evaluation of the basic physical properties of the fine-aggregate concrete with partial cement replacement by recycled concrete powder such as density, water absorption capacity and capillary water absorption. The fine recycled concrete which was used as partial replacement of cement had the same grain size as cement. The replacement rate was 0 %, 5 %, 10 % and 15 %. Physical properties were investigated by using cubic and prismatic specimens.

ACS Style

Tereza Pavlů; Magdaléna Šefflová. Non Destructive Testing of Concrete with Recycled Cement Powder. Applied Mechanics and Materials 2016, 825, 45 -48.

AMA Style

Tereza Pavlů, Magdaléna Šefflová. Non Destructive Testing of Concrete with Recycled Cement Powder. Applied Mechanics and Materials. 2016; 825 ():45-48.

Chicago/Turabian Style

Tereza Pavlů; Magdaléna Šefflová. 2016. "Non Destructive Testing of Concrete with Recycled Cement Powder." Applied Mechanics and Materials 825, no. : 45-48.

Journal article
Published: 01 February 2016 in Applied Mechanics and Materials
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This investigation was focused on possibility of use recycled cement powder originating from the construction and demolition concrete waste as partial replacement of cement in concrete mixture. The main goal of this paper is the study of the mechanical properties development of the fine-aggregate concrete with partial cement replacement at the age 7, 14 and 28 days. The compressive strength and dynamic modulus of elasticity were tested in time. The recycled cement powder from fine recycled concrete, which was used as partial replacement of cement, had the same grain size as cement. The concrete mixtures contained 95 %, 90 % and 85 % of cement and residue has been replaced by recycled cement powder. Mechanical properties were tested on cubic and prismatic specimens.

ACS Style

Tereza Pavlů; Magdaléna Šefflová. The Development of the Fine-Aggregate Concrete Strength with Recycled Cement Powder. Applied Mechanics and Materials 2016, 827, 255 -258.

AMA Style

Tereza Pavlů, Magdaléna Šefflová. The Development of the Fine-Aggregate Concrete Strength with Recycled Cement Powder. Applied Mechanics and Materials. 2016; 827 ():255-258.

Chicago/Turabian Style

Tereza Pavlů; Magdaléna Šefflová. 2016. "The Development of the Fine-Aggregate Concrete Strength with Recycled Cement Powder." Applied Mechanics and Materials 827, no. : 255-258.

Journal article
Published: 01 February 2016 in Applied Mechanics and Materials
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This paper is focused on non-destructive testing of concrete containing fine recycled aggregate (FRA). FRA was obtained from demolished concrete structures and crushed in the laboratory on fraction 0 – 4 mm. There were prepared four concrete mixtures. The first concrete mixture was control, did not include FRA. In other mixtures was natural replaced natural sand by FRA. There were tested workability of fresh concrete mixture and physical properties of hardened concrete. Finally, it is possible to say that the use of FRA influences the physical properties of concrete. The physical properties of concrete are connected with the durability of concrete. Therefore, it is necessary to focus on durability testing of FRA concrete in further research.

ACS Style

Magdaléna Šefflová; Tereza Pavlů. Non-Destructive Testing of Concrete with Fine Recycled Aggregate. Applied Mechanics and Materials 2016, 825, 63 -68.

AMA Style

Magdaléna Šefflová, Tereza Pavlů. Non-Destructive Testing of Concrete with Fine Recycled Aggregate. Applied Mechanics and Materials. 2016; 825 ():63-68.

Chicago/Turabian Style

Magdaléna Šefflová; Tereza Pavlů. 2016. "Non-Destructive Testing of Concrete with Fine Recycled Aggregate." Applied Mechanics and Materials 825, no. : 63-68.

Journal article
Published: 01 February 2016 in Applied Mechanics and Materials
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This paper is focused on the mechanical properties development of fine recycled aggregate (FRA) concrete. FRA was obtained from recycling plant in the Czech Republic. There were prepared four concrete mixtures in the laboratory. The first mixture was reference (REF) with fine natural aggregate (FNA). FNA was replaced in concrete mixtures R10, R20 and R30 in varying replacement ratio. The concrete mixtures R10, R20 and R30 contained 10 %, 20 % and 30 % FRA. There were tested properties of concrete. Finally, it is possible to say that the use of the FRA in concrete influences concrete properties. It is necessary to verify of probably an improvement of compressive strength of FRA concrete in future research. However, FRA concrete is possible to be used in the manufacturing of building structures, but it is necessary to test durability and lifespan of FRA concrete.

ACS Style

Magdaléna Šefflová; Tereza Pavlů. Study of the Mechanical Properties Development of Concrete Containing Fine Recycled Aggregate. Applied Mechanics and Materials 2016, 827, 267 -270.

AMA Style

Magdaléna Šefflová, Tereza Pavlů. Study of the Mechanical Properties Development of Concrete Containing Fine Recycled Aggregate. Applied Mechanics and Materials. 2016; 827 ():267-270.

Chicago/Turabian Style

Magdaléna Šefflová; Tereza Pavlů. 2016. "Study of the Mechanical Properties Development of Concrete Containing Fine Recycled Aggregate." Applied Mechanics and Materials 827, no. : 267-270.

Journal article
Published: 01 January 2016 in Key Engineering Materials
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The use of coarse recycled aggregate in concrete is already accepted in the Czech Republic but with specific restrictions. The problem is the use of fine recycled aggregate (FRA) in concrete. This paper is focused on behavior of concrete containing FRA. FRA, which originated from recycling plant in the Czech Republic, was used in an experimental part. FRA was obtained from demolished and crushed concrete structures. Four concrete mixtures were designed and prepared. The first concrete mixture was reference which did not include FRA. Natural sand was replaced by FRA in other concrete mixtures in varying ratio. There were tested physical, mechanical and deformation properties of concrete. According to test results it is possible to say that the use FRA as partial replacement of natural sand in concrete mixtures.

ACS Style

Magdaléna Šefflová; Tereza Pavlů; Vladimír Hujer. Behavior of Concrete Containing of Fine Recycled Aggregate. Key Engineering Materials 2016, 677, 260 -265.

AMA Style

Magdaléna Šefflová, Tereza Pavlů, Vladimír Hujer. Behavior of Concrete Containing of Fine Recycled Aggregate. Key Engineering Materials. 2016; 677 ():260-265.

Chicago/Turabian Style

Magdaléna Šefflová; Tereza Pavlů; Vladimír Hujer. 2016. "Behavior of Concrete Containing of Fine Recycled Aggregate." Key Engineering Materials 677, no. : 260-265.

Journal article
Published: 01 January 2016 in Key Engineering Materials
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The main aim of this contribution is verification of properties of concrete with partial replacement of cement by recycled cement powder originating from waste concrete. The main topic of this article is the study of influence of partial replacement of cement by recycled cement powder (RCP) to the cement paste properties, workability of fresh concrete and strength development and dynamic modulus of elasticity of fine aggregate concrete with partial replacement of cement. The workability of fresh concrete were tested by flow table test. The compressive strength, tensile strength in bending and dynamic modulus of elasticity were tested at the age 7, 14, 28 and 90 days. Partial replacement of cement was 0, 5, 10 and 15 % for all these tests. Mechanical properties were investigated by using cubic and prismatic specimens. The determination of the initial setting time of cement paste were measured by automatic Vicat apparatus for replacement rate of cement 0, 5, 10, 15 and 25 %.

ACS Style

Tereza Pavlů; Magdaléna Šefflová; Vladimír Hujer. The Properties of Fine-Aggregate Concrete with Recycled Cement Powder. Key Engineering Materials 2016, 677, 292 -297.

AMA Style

Tereza Pavlů, Magdaléna Šefflová, Vladimír Hujer. The Properties of Fine-Aggregate Concrete with Recycled Cement Powder. Key Engineering Materials. 2016; 677 ():292-297.

Chicago/Turabian Style

Tereza Pavlů; Magdaléna Šefflová; Vladimír Hujer. 2016. "The Properties of Fine-Aggregate Concrete with Recycled Cement Powder." Key Engineering Materials 677, no. : 292-297.

Journal article
Published: 01 June 2015 in Advanced Materials Research
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This article deals with the influence of recycled aggregate quality on recycled concrete. Replacement of natural aggregate by recycling aggregate has a negative influence on the properties of concrete. Three types of recycled aggregate were used for the production of concrete. The samples of recycled aggregate were obtained from two recycling plants in the Czech Republic. The samples of recycled aggregate were tested by pycnometric method. From the test results, a different quality of recycled aggregate was discovered. For the testing of concrete, a total of eight concrete mixtures were made, one of which was a reference mixture and the natural aggregate was replaced by recycled aggregate of varying ratio in the other mixtures. Finally, it is possible to say that use of recycled aggregate in concrete influences the properties of concrete. This influence depends on the quality and amount of recycled aggregate in the concrete.

ACS Style

Magdalena Šefflová; Tereza Pavlů. Influence of Recycled Aggregate Quality on Recycled Concrete. Advanced Materials Research 2015, 1106, 45 -48.

AMA Style

Magdalena Šefflová, Tereza Pavlů. Influence of Recycled Aggregate Quality on Recycled Concrete. Advanced Materials Research. 2015; 1106 ():45-48.

Chicago/Turabian Style

Magdalena Šefflová; Tereza Pavlů. 2015. "Influence of Recycled Aggregate Quality on Recycled Concrete." Advanced Materials Research 1106, no. : 45-48.