Wyniki wyszukiwania - BazTech

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Effect of polypropylene fiber addition on mechanical properties of concrete based on portland cement

Małek M., Życiński W., Jackowski M., Wachowski M.

Technical Sciences / University of Warmia and Mazury in Olsztyn

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2018

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nr 21(3)

207--214

EN

In this work results of poly(propylene) fibers (PP), from recycling process, added into concrete mixture based on portland cement was characterized. The main purpose of this research was to identify direct influence of the fibers addition on the concrete mechanical strength. The recipe of the concrete was prepared using three types of aggregates with different grain size: 0.125–0.250, 0.250–0.500 and 0.500–1.000 mm, deflocculant based on polycarboxylates, water and portland cement (42.5 MPa). To identify structures of the researched samples and fibers light microscopy (LM) observation was performed. Basic properties of concrete mixture were defined by slump cone test and setting time. Mechanical properties such as compressive strength and bending test after 1, 7, 14 and 28 days were characterized. Obtained results were compared with mixtures without fibers modifications. Study was proven that all chosen fibers from recycled origin revealed increased effect on final mechanical properties of concrete and are very perspective for future application in concrete technology.

2

Non-alcoholic beer production – an overview

Jackowski M., Trusek A.

Polish Journal of Chemical Technology

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2018

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Vol. 20, nr 4

32--38

EN

Through years beer became one of the best known alcoholic beverages in the world. For some reason e.g. healthy lifestyle, medical reasons, driver’s duties, etc. there is a need for soft drink with similar organoleptic properties as standard beer. There are two major approaches to obtain such product. First is to interfere with biological aspects of beer production technology like changes in mashing regime or to perform fermentation in conditions that promote lower alcohol production or using special (often genetic modified) microorganism. Second approach is to remove alcohol from standard beer. It is mainly possible due to evaporation techniques and membrane ones. All these approaches are presented in the paper.

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Kapilarna elektroforeza strefowa w analizie medycznej - nowe fakty w diagnostyce Helicobacter pylori

Buszewski B., Kłodzinska E., Dam H., Różycki H., Jackowski M., Szeliga J.

Analityka : nauka i praktyka

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2005

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nr 4

24-27