Sustainable Use of Reservoir Sediment through Partial Application in Building Material

Junáková, Natália; Junak, Jozef

doi:10.3390/su9050852

Cited by 28 publications

(10 citation statements)

References 30 publications

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“…Traditional building materials, such as concrete, are increasingly being replaced with advanced composite materials in accordance with the principles of sustainability in civil engineering. One of the options involves a partial replacement of cement with active cementitious substances, such as mineral or industrial solid byproducts and wastes (metakaolin, coal and municipal solid waste fly-ash, agro-technical ash, quarry dust, blast furnace slag and reservoir sediments) [8][9][10][11][12][13]. This practice is favorable to the industry, resulting in a concrete that has lower costs and environmental impact, and greater long-term strength, and durability [14].…”

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Sustainable Bio-Aggregate-Based Composites Containing Hemp Hurds and Alternative Binder

et al. 2018

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This experimental study was focused on the application of a surface-modified hemphurds aggregate into composites using an alternative binder of MgO-cement. This paper presents the results of the comparative study of the parameters (chemical and physico-chemical modification, and hardening time) affecting the physical (density, thermal conductivity coefficient and water-absorption behavior) and mechanical properties (compressive strength) of the bio-aggregate-based composite. A test of the parameters of the bio-composite samples showed some differences, which were determined by the chemical and surface properties of the modified filler, and which affected the mechanisms of hardening. The bulk density values of the hemp hurd composites hardened for 28 days place this material in the lightweight category of composites. The values of water absorption and the thermal conductivity coefficient of bio-composites decreased, and the strength parameter increased with an increase in the hardening time. The lower values of compressive strength, water absorption, and thermal conductivity coefficient (except for the ethylenediaminetetraacetic-acid-treated filler) were observed in composites based on fillers chemically treated with NaOH and Ca(OH) 2 ) compared to referential composites (based on original hemp hurds). This is related to changes in the chemical composition of hemp hurds after chemical modification. The composites with ultrasound-treated hemp hurds had the greatest strengths at each hardening time. This is related to pulping the bundles of fibers and forming a larger surface area for bonding in the matrix. demand for natural fibers is growing worldwide and its price is increasing, it is still significantly lower than that of synthetic fibers; these plants need further research with respect to the opportunities for their use, and to provide novel products with improved properties. Among a wide variety of lignocellulosic material sources, a great importance is given to technical hemp (Cannabis Sativa) for its application in bio-composites. Industrial hemp is becoming a major focus of the green housing segment because of its energy-efficient cultivation, and because hemp-based composites have no negative effects on human health [5]. The excellent physical and mechanical properties of hemp, including low density, high specific stiffness and strength, biodegradability, sound absorption, low processing costs and the ecological suitability of this fast-growing, carbon-negative and non-toxic plant, predispose it for use in building materials (bio-composites) based on inorganic matrices [6], mainly for their application in the housing construction [7]. Traditional building materials, such as concrete, are increasingly being replaced with advanced composite materials in accordance with the principles of sustainability in civil engineering. One of the options involves a partial replacement of cement with active cementitious substances, such as mineral or industrial solid byproducts and wastes (metakaolin, coal and municipal s...

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Sustainable Bio-Aggregate-Based Composites Containing Hemp Hurds and Alternative Binder

et al. 2018

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“…Standard sand according to the requirements of CSN EN 196-1 [20] was used in three fractions marked PG I (0.08-0.5 mm), PG II (0.5-1 mm), and PG III (1-2 mm). These fractions are represented in a volume ratio of PG1:PG2:PG3-33.3:33.3:33.3%.…”

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confidence: 99%

“…Their results have shown that after 28 days, the compressive strength of most samples was higher than 96% of the reference samples of concrete [12,19]. Apart from that, dry sludge can be used as binder or filler for the production of concrete mixture, following a study on the use of sediment from water management tanks [20]. Because this material has natural fineness, it can be used as the product replacing very commonly used limestone-cement fillers.…”

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Reuse of Waste Material “Waste Sludge Water” from a Concrete Plant in Cement Composites: A Case Study

et al. 2019

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Featured Application: The results of the research indicate the possible useing of waste sludge water directly in the concrete plant where they are produced. It will reduce waste generation and reduction of payments for their liquidation.Abstract: This paper presents the results of research dealing with the use of recycled waste sludge water from a concrete plant (CP) as partial or complete replacement of mixing water in cement mixtures. The need to recycle waste sludge water generated as a by-product (waste sludge water) during the production of fresh concrete in the concrete plant results from the environmental and economic problems associated with the operation of the concrete plant. Mixing water was replaced with recycled waste sludge water in the amount of 25%, 50%, 75%, and 100%. In order to determine the effect of partial or complete replacement of mixing water with waste sludge water from the concrete plant in the production of cement composites, laboratory tests of waste sludge water were carried out to determine whether the waste sludge water complies with the requirements for mixing water defined in CSN EN 1008. The tests also determined the properties of fresh cement mortar and hardened cement composites. These were tests of the beginning and end of cement mortar setting, and the strength characteristics (flexural strength, compressive strength). The results of these tests show that it is possible to replace the mixing water by waste sludge water from the concrete plant in the amount of up to 25% without significantly affecting the tested properties, in comparison with the formula containing pure mixing water.Appl. Sci. 2019, 9, 4519 2 of 12 water-cement ratio for proper hydration, as shown by the studies [5][6][7][8]. Knowing the interactions of the individual components of cement composites, the desired properties of the resulting composites can be achieved. The knowledge of interactions does not only apply to waste mixing water, but can also be applied to other waste products, as suggested by the studies [9][10][11]. In fact, it is estimated that a truck with the volume of 9 m 3 carries approximately 300 kg of returned concrete a day. This remaining concrete is generally discharged into large containers and, after hardening, the concrete can be crushed and used as recycled aggregate for further construction. After emptying the rest of fresh concrete, the agitation truck is washed with large amount of water, 700-1300 litres per truck, and the scattered mass settles in large sedimentation tanks [12,13]. Due to the large amount of suspended substances and high alkaline conditions, untreated sludge water cannot be legally discharged into municipal sewer systems [1]. Water is an important component of concrete. It participates in the hydration of cement, but also contributes to the workability of fresh concrete. The quality of mixing water is therefore crucial for the properties of fresh concrete, including the strength and durability. Most standards specify that water used as mixing water must be clean ...

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“…According to the United Nations Environment Program (UNEP-SETAC) [4], the building sector consumes about 40% of the energy, 25% of the water, and 40% of the resources available on Earth, while producing 30% of greenhouse gases. However, compared to other industrial areas, the construction industry has the greatest potential to achieve a significant reduction in negative impacts using new technologies and also sustainable materials, such as with reused, recycled, or recovered materials content, or materials made using renewable resources [5]. For example, every tone of produced ordinary Portland cement releases an equivalent amount of carbon dioxide to the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Sustainability Potential Evaluation of Concrete with Steel Slag Aggregates by the LCA Method

et al. 2020

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Sustainability in the construction industry refers to all resource-efficient and environmentally responsible processes throughout the life cycle of a structure. Green buildings may incorporate reused, recycled, or recovered materials in their construction. Concrete is as an important building material. Due to the implementation of by-products and waste from various industries into its structure, concrete represents a significant sustainable material. Steel slag has great potential for its reuse in concrete production. Despite its volume changes over time, steel slag can be applied in concrete as a cement replacement (normally) or as a substitute for natural aggregates (rarely). This paper focused on an investigation of concrete with steel slag as a substitute of natural gravel aggregate. Testing physical and mechanical properties of nontraditional concrete with steel slag as a substitute for natural aggregates of 4/8 mm and 8/16 mm fractions confirmed the possibility of using slag as a partial replacement of natural aggregate. Several samples of concrete with steel slag achieved even better mechanical parameters (e.g., compressive strength, frost resistance) than samples with natural aggregate. Moreover, a life cycle assessment (LCA) was performed within the system boundaries cradle-to-gate. The LCA results showed that replacements of natural aggregates significantly affected the utilization rate of nonrenewable raw materials and reduced the overall negative impacts of concrete on the environment up to 7%. The sustainability indicators (SUI), which considered the LCA data together with the technical parameters of concrete, were set to evaluate sustainability of the analyzed concretes. Based on the SUI results, replacing only one fraction of natural gravel aggregate in concrete was a more sustainable solution than replacing both fractions at once. These results confirmed the benefits of using waste to produce sustainable materials in construction industry.

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Sustainable Use of Reservoir Sediment through Partial Application in Building Material

Cited by 28 publications

References 30 publications

Sustainable Bio-Aggregate-Based Composites Containing Hemp Hurds and Alternative Binder

Sustainable Bio-Aggregate-Based Composites Containing Hemp Hurds and Alternative Binder

Reuse of Waste Material “Waste Sludge Water” from a Concrete Plant in Cement Composites: A Case Study

Sustainability Potential Evaluation of Concrete with Steel Slag Aggregates by the LCA Method

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