Archives of Civil Engineering

Kledyński, Z.; Bogdan, A.; Jackiewicz-Rek, W.; Lelicińska-Serafin, Krystyna; Machowska, Agnieszka; Manczarski, Piotr; Masłowska, Dagmara; Rolewicz-Kalińska, Anna; Rucińska, Joanna; Szczygielski, T.; Walczak, Justyna; Wojtkowska, Małgorzata; Żubrowska-Sudoł, Monika

doi:10.24425/ace.2020.131820

Cited by 8 publications

(1 citation statement)

References 64 publications

(83 reference statements)

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“…Changing the status of washed mineral waste from mechanical wastewater treatment to a by-product for construction applications could become another example of implementing a circular economy in Poland [7]. Moreover, such an action proves once again that wastewater treatment plants are facilities where the assumptions of the circular economy model can be systematically implemented [8], for example, by recovering resources such as nutrients, water and energy from wastewater [9], or recovering organic compounds, nutrients and energy from sewage sludge generated in wastewater treatment processes [10], or even recycling ashes from sewage sludge combustion and using them as a by-product, such as in road embankments [11].…”

Section: Introductionmentioning

confidence: 99%

Geotechnical Properties of Washed Mineral Waste from Grit Chambers and Its Potential Use as Soil Backfill and Road Embankment Materials

Kostrzewa,

Popielski,

Dąbska

2024

Buildings

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The current practice of managing washed mineral waste from grit chambers under national legislation focuses primarily on its disposal, generating high costs for wastewater treatment plants. Other ways are being sought to enable its use, especially as a by-product in the construction industry. This paper presents the results of laboratory tests of the geotechnical, physical and mechanical parameters of washed mineral waste from grit chambers. Research samples were taken from the largest, in terms of maximum daily capacity, wastewater treatment plant “Czajka” in Poland. The washed mineral waste was characterized by organic matter content (0.36% by Tyurin’s method or 1.04% by the loss on ignition method), fraction content (sand fraction was at least 90%; it corresponds in grain size to uniform-grained medium sand), specific density of solids (2.55 g/cm3), dry density, void ratio and porosity corresponding to the state of the loosest and densest possible composition of soil grains and particles (1.54 g/cm3, 0.656, 0.396 and 1.87 g/cm3, 0.364, 0.267, respectively), sand equivalent (93), passive capillarity (0.20 m), maximum dry density (1.78 g/cm3), optimal moisture content (11.23%), degree of saturation after compaction (0.66) and permeability coefficient (6.22·10−3cm/s). The mechanical parameters determined included internal friction angle (35.5°) and apparent cohesion (14.27 kPa). The possibility of using washed mineral waste as soil for the backfill of installation trenches, abutments and retaining structures, as well as road embankment material, was evaluated considering current standards and legislation. It was found that the values of the determined parameters of washed mineral waste coincide with the values of the geotechnical parameters of sand, and there is a possibility of using this waste as a material in the indicated applications after fulfilling the appropriate conditions.

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Section: Introductionmentioning

confidence: 99%

Geotechnical Properties of Washed Mineral Waste from Grit Chambers and Its Potential Use as Soil Backfill and Road Embankment Materials

Kostrzewa,

Popielski,

Dąbska

2024

Buildings

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Mixtures of colliery spoils and fluidized bed bottom ash: strength and swelling behavior under compressive stress in isolated conditions

Krysiak

Kledyński

Machowska

2023

Bull Eng Geol Environ

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The amount and variety of waste materials used in civil engineering are steadily increasing due to the depletion of natural resources and the implementation of environmental policies. A new mixture of colliery spoils and fluidized bed bottom ash was recently developed in Poland, which proved to be prone to excessive, long-term swelling, potentially damaging structures such as road embankments. Numerous papers discuss the heaving mechanisms in spoils or fluidized bed ash. However, no reports analyzing the expansion of their mixture seem to be available. The purpose of this paper is to fill this void. The experiment involved measurements of linear swelling of mixture samples stored inside CBR test molds and isolated from moisture loss/gain. Material expansion is caused by the reactivity of the fluidized bed ash; its content in the mix correlates positively with the final swelling strain. At the same time, colliery spoils provide an environment particularly conducive to the phenomenon’s occurrence. A linear swelling strain of 0.3–3.2% was observed after 6 months (disregarding the first 24 h of rapid volume growth). The expansion of mixtures was also measured under constant compressive stress of 0–100 kPa to better represent their actual working conditions. Based on the results, it is proposed to adapt a mathematical model developed for anhydrite-rich rock to describe the load-swelling relationship in mixtures of colliery spoils with fluidized bed bottom ash. Such a model can be potentially used, e.g., in numerical analyses, to assess the impact of the material’s expansion on embankments.

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Barriers impeding circular economy (CE) uptake in the construction industry

Osei-Tutu¹,

Ayarkwa

Osei‐Asibey

et al. 2022

SASBE

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PurposeThis study aimed to identify barriers impeding circular economy (CE) uptake in the construction industry in literature, categorize them for the development of a framework and to seek the interrelationships among the categorized barriers. This allowed for identifying integrated solutions to holistically address the barriers. The study also sought to identify the “hot” themes, the knowledge gaps and future research directions on barriers impeding CE.Design/methodology/approachForty-eight relevant articles were desk reviewed from different construction peer-reviewed journals and published conference papers. A scientometric analysis allowed for co-occurrence of keywords relating to CE. A content analysis enabled the identification of 79 barriers impeding the uptake of CE in the construction industry which were further categorized into six distinct categories for the development of a framework showing the interrelationships among the categorized barriers.FindingsThe identified barriers include construction sector inertia, lack of design standards, lack of knowledge, awareness and understanding, design cost, and perception of second-hand materials as substandard among others. The study categorized the identified barriers for better understanding into six different groups: cultural barriers, social barriers, environmental barriers, economic barriers, technical barriers and technological barriers. Strategies to address the barriers were also proposed. The interrelationships among the various barriers were also shown in a proposed framework to educate professionals on the interconnectivity of the barriers.Practical implicationsCategorization of the various barriers impeding CE uptake contributes to the body of knowledge. Also, the interrelationships among the various categorized barriers in the framework will enable construction professionals make informed decisions regarding the successful integration of CE in the industry, better appreciate the barriers that impede CE uptake and apply strategies to holistically address the barriers. This will expand current knowledge outside the narrow scope of isolated barriers.Social implicationsTo the global construction industry, the review presents a list of barriers and their interrelationships that could provide implementation strategies for the uptake of CE in the industry.Originality/valueThe geographical scope of this study is not limited, and therefore encourages wide applicability of the findings to the global construction industry.

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Archives of Civil Engineering

Cited by 8 publications

References 64 publications

Geotechnical Properties of Washed Mineral Waste from Grit Chambers and Its Potential Use as Soil Backfill and Road Embankment Materials

Geotechnical Properties of Washed Mineral Waste from Grit Chambers and Its Potential Use as Soil Backfill and Road Embankment Materials

Mixtures of colliery spoils and fluidized bed bottom ash: strength and swelling behavior under compressive stress in isolated conditions

Barriers impeding circular economy (CE) uptake in the construction industry

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