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The influence of variable temperature conditions on selected properties of resin mortars modified with recycled materials

Dębska Bernardeta, Caetano Marina Altoé, Silva Guilherme Jorge Brigolini

Composites Theory and Practice

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2024

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R. 24, nr 2

155--163

EN

Polymer composites have a number of valuable properties that enable them to find a special place in the field of civil engineering. In response to current trends related to sustainable construction and the circular economy, effective ways of modifying these composites with recycled materials are being sought. This approach, in turn, makes these materials require systematic monitoring of their durability, especially in the context of variable operating temperatures. The article describes the results of the testing of concrete-like epoxy composites modified with waste materials, both within the resin matrix – by glycolysate obtained on the basis of propylene glycol and poly(ethylene terephthalate) derived from waste beverage bottles, and aggregates - polyethylene agglomerate from waste bags and waste rubber granules from car tires. After seven days of maturation in laboratory conditions, the mortar samples were exposed in a climatic chamber to cyclic (50 and 100 cycles) temperature changes ranging from +20 °C to +100 °C and from –10 °C to +10 °C. Then, strength tests, changes in the mass and adhesion to cement concrete were carried out. The proposed material solution, combined with the conducted set of tests, brings scientific novelty to the field of building composites. The test results confirm the beneficial effect of modification, especially when it took place in the resin matrix. Positive temperature cycles resulted in post-hardening of the samples and thus an increase in the strength characteristics. The impact of negative temperatures was more unfavorable for the material; after 100 cycles, in most cases, a slight decrease in the mechanical parameters was noted, while the adhesion remained at a very good level, twice as high as that required for repair systems.

2

Betony żywiczne zawierające odpady do zastosowań w infrastrukturze komunikacyjnej

Dębska Bernardeta

Drogownictwo

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2023

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nr 2-3

44--51

PL

Zasady racjonalnego wykorzystania zasobów, materiałów i energii powinny być stosowane na każdym etapie życia produktu, również w momencie, gdy staje się on odpadem. W artykule zdefiniowano pojęcie betonu żywicznego (polimerobetonu), jego cechy techniczne oraz wskazano możliwości aplikacyjne w obszarze infrastruktury komunikacyjnej. Opisano sposoby modyfikacji tego typu kompozytów przez wybrane materiały odpadowe. Zestawiono wyniki badań polimerobetonów otrzymywanych z wykorzystaniem recyklatów i porównano je z właściwościami deklarowanymi przez producentów prefabrykatów polimerobetonowych dedykowanych do zastosowań w obszarze inżynierii komunikacyjnej.

EN

The principles of rational use of resources, materials and energy should be applied at every stage of a product’s life, also when it becomes waste. The article defines the concept of resin concrete (polymer concrete), its technical features and indicates the application possibilities in the area of communication infrastructure. Methods of modification of this type of composites by selected waste materials are described. The results of tests on polymer concretes obtained with the use of recyclates were summarized and compared with the properties declared by the producers of prefabricated polymer concrete products dedicated to applications in the field of communication engineering.

3

The evaluation of the possible utilization of waste glass in sustainable mortars

Dębska Bernardeta, Krasoń Joanna, Lichołai Lech

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2020

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Vol. 9 Nr 2

7--15

EN

The assumptions of the low-carbon economy and sustainable development in construction leads to the search for ecological solutions in materials whose production generates significant amounts of carbon dioxide. Cement substitution with waste glass powder used in building mortars is part of this trending solution. This paper describes the results on the selective properties of mortars containing powdered waste glass in the amount of 0-20% by weight. The proposed modification gives satisfactory physical and mechanical properties to the cement mortars used in the building industry.

4

Application of Taguchi method for the design of cement mortars containing waste materials

Dębska Bernardeta, Krasoń Joanna, Lichołai Lech

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2020

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Vol. 9 Nr 1

15--26

EN

Industries related to the acquiring of building materials may soon face a shortage of natural resources and an associated increase in costs of their acquisition. Therefore, it is necessary to look for possible ways to reduce the exploitation of natural resources and instead use recycled raw materials. Such policies fit into one of the most important trends in modern construction, which is sustainable development. In the conducted research, the Taguchi method was utilized in order to investigate the impact of modifying cement mortars with rubber and cork waste on the selected properties of the obtained composites. Thanks to the above method, we managed to obtain the desired information about mortars in a shorter time and at a lower cost than using traditional testing methods. Using the selection in planning method, we confirmed that rubber waste can be a good substitute for sand in mortars.

5

Evaluation of the Utility of Using Classification Algorithms when Designing New Polymer Composites

Dębska Bernardeta, Dębska Barbara, Lichołai Lech

Journal of Ecological Engineering

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2019

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Vol. 20, nr 8

212--225

EN

Polymer composites are the materials that can be successfully used in the places where high mechanical strength and chemical resistance as well as low absorbability are required. These unique features of polymer composites are obtained mainly due to a suitably selected binder, i.e. a synthetic resin. At the same time, this component accounts for the high production costs of these materials. Partial substitution of the resin with glycolisates obtained using poly(ethylene terephthalate) waste (PET), helps reduce the price of polymeric mortars, while maintaining favourable physicomechanical properties. This modification method also has a beneficial effect on the environment, as it allows the utilisation of a very common waste, which is difficult to dispose of. The article concerns three types of resin mortars, i.e. epoxy, polyester and polyester with the addition of colloidal silica, modified with PET glycolisate. On the basis of the obtained data set and database knowledge mining techniques, such as discriminant analysis and decision trees, it was shown to what extent the type of resin and the presence of an added modifier differentiate the mortar properties. The results obtained with both methods were compared. It was confirmed that these techniques are effective both in the classification and prediction of the type (selection) of mortar in the process of designing new composites.

6

Designing Cement Mortars Modified with Cork and Rubber Waste Using Theory of the Experiment

Dębska Bernardeta, Krasoń Joanna, Lichołai Lech

Journal of Ecological Engineering

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2019

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Vol. 20, nr 9

121--130

EN

The article concerns the possibility of obtaining modified cement mortars and assessing their selected properties, i.e. bending and compressive strength, volume density of hardened mortars and water absorption. The modification consisted in a partial (0–50% vol.) substitution of sand by waste, crushed rubber, and cork. In the mortar design process, the theory of the experiment was used. The central composite design used available in the Statistica software package was response surface. This approach allowed to significantly reduce the number of experiments, reduce costs, and at the same time keep the maximum information about the mortars tested. The conducted research showed that waste materials can be an alternative to natural aggregates in the process of obtaining light mortars.