Wyniki wyszukiwania - BazTech

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Effect of thermoplastic waste from production on the strength of cement mortars

Pietrzak Alina

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2023

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nr 75 (147)

42--48

EN

This paper presents study results on the effect of the addition of polymeric waste on selected mechanical properties (flexural and compressive strength) of cementitious composites with a special emphasis on cement mortars. This research focuses on cement mortars, commonly used in construction applications such as seaports and quays. Here, post-production waste from the production of automobile floor mats is ground to a fraction of 0–2 mm and used in the amounts of 5%, 7.5%, and 10% by weight of cement as an additive or substitute for sand. All the presented tests are conducted in accordance with PN-EN 197-1. The purpose of these tests is to determine the possibility of using thermoplastic waste as an aggregate substitute or additive in cement mortars. The conducted research confirmed the possibility of using the mentioned waste in cement mortar production technology in the amount of 5% as a substitute for sand.

2

The effect of polymer waste addition on the quality of concrete composite

Pietrzak Alina

Quality Production Improvement - QPI

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2021

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Vol. 3, Iss. 1

326--338

EN

Concrete is one of the most important construction materials, which, due to its properties, provides complete freedom in using it in construction, and thus in shaping the space. Despite numerous advantages (ease of use, high compressive strength, low production cost, resistance to high temperatures), it also has disadvantages, which include, first of all, low tensile strength and sensitivity to the destructive effects of chemical agents. The continuous increase in expectations regarding the improvement of concrete quality meant that concrete began to be modified, inter alia, with polymers to eliminate the above-mentioned disadvantages. This paper presents a review of articles on the possibilities of using polymer waste in concrete technology and their impact on the quality of the produced concrete composites.

3

Selection of the test method and its influence on the obtained results of soil strength parameters

Pietrzak Alina, Jura Jakub

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2021

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Vol. 10 Nr 2

119--126

EN

The paper presents issues related to the methodology of measuring soil strength parameters. The laboratory methods for determining the shear strength of soil are described, with particular emphasis on the measurement of soil strength using the direct shear method and the triaxial compression apparatus. An attempt was made to determine the impact of the research methodology on the quality of the obtained strength parameters of the soil.

4

The effect of adding slag, achieved from wastewater sludge incineration in fluidized-bed furnace, on the quality of concrete

Pietrzak Alina

Quality Production Improvement - QPI

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2019

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Vol. 1, Iss. 1

244--250

EN

Due to a constant increase in generating the amount of sewage waste it is necessary to find an alternative method of its use or disposal. One of such methods can be utilization of sewage sludge in construction materials industry, particularly in concrete technology and other materials based on cement. It allows using waste materials as a passive additive (filler) or also as an active additive (replacement of part of bonding material). The article aims at presenting the analysis of the effect of adding slag, achieved from wastewater sludge incineration in sewage treatment plant, on properties and quality of concrete mix and hardened concrete. Using an experimental method, the researcher designed the composition of the control concrete mix, which was then modified by means of slag. For all concrete mixtures determined – air content with the use of pressure method and consistency measured by the use of concrete slump test. For all concrete series the following tests were conducted: compressive strength of concrete after 7, 28 and 56 days of maturing, frost resistance for 100 cycles of freezing and thawing, water absorption. The use of slag, ground once in the disintegrator, causes a decrease of in compressive strength of concrete samples in relation to the control concrete series as well as bigger decrease in compressive strength after frost resistance test.

5

Wpływ popiołów powstałych ze spalania osadów ściekowych na podstawowe właściwości mechaniczne betonu

Pietrzak Alina

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2019

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Vol. 8 Nr 1

29--35

PL

Przedstawiono analizę wpływu dodatku popiołu, powstałego ze spalania osadów ściekowych w oczyszczalniach ścieków, na właściwości stwardniałego betonu. Metodą doświadczalną zaprojektowano skład mieszanki betonowej kontrolnej, którą następnie modyfikowano przy użyciu popiołu lotnego. Dla wszystkich uzyskanych serii betonów wykonano badania: wytrzymałości na ściskanie betonu po 7, 28 i 56 dniach dojrzewania, mrozoodporności dla 100 cykli zamrażania i rozmrażania, nasiąkliwości. Betony modyfikowane popiołem powstałym ze spalania osadów ściekowych charakteryzowały się porównywalną wytrzymałością na ściskanie w stosunku do betonu kontrolnego oraz odnotowały niższy spadek wytrzymałości na ściskanie po badaniu mrozoodporności.

EN

The article presents an analysis of the impact of fly ash addition, which originated from the combustion of sewage sludge in sewage treatment plants, on the properties of hardened concrete. The composition of control concrete mixture was designed using the experimental method, and then it was modified using fly ash. For all concrete series obtained, tests were performed: compressive strength of concrete after 7, 28 and 56 days of maturation, frost resistance for 100 cycles of freezing and thawing, and absorbability. Ash-modified concretes formed from the combustion of sewage sludge were characterized by comparable compressive strength in comparison to the control concrete and recorded a lower drop in compressive strength after the frost resistance test.