Nowe zasoby w kolekcji Materiały konferencyjne w czasopiśmie http://suw.biblos.pk.edu.pl/ Biblioteka Politechniki Krakowskiej lipinska@biblos.pk.edu.pl 60 <![CDATA[Research methodology for vibration isolation materials]]> Mon, 18 Oct 2021 14:17:50 +0200 Stankiewicz, Marek; Targosz, Jan
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The paper presents basic research which should be subjected to the material that could be used in vibration isolation system of engineering structures, or in the foundation systems of road or railways (tramways and train lines). These studies were carried out for number of types of elastic elements and the results thereof are available at work.]]>
<![CDATA[Effect of corundum sand proportion on strength properties geopolymer mortar based on fly ash]]> Mon, 18 Oct 2021 13:45:36 +0200 Pławecka, Kinga; Korniejenko, Kinga; Bazan, Patrycja
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The main objective of this study is to investigate the possibility of replacing the traditional construction aggregate, river sand, with corundum material and to evaluate the effect of the proportion of corundum sand on the strength properties of fly ash based geopolymer mortar. Electrocorundum (white) and fly ash from a thermal power plant in Skawina were used to make the samples. Different fractions of electrocorundum were used to prepare the geopolymer mass. A geopolymer based on fly ash and river sand was used as reference material. The results showed that the average compressive strength of fly ash and alumina-based materials increased (results ranging from 25.9 to 47.0 MPa) compared to the reference samples (20.7 MPa). The flexural strength results showed a weakening of the strength properties of the electrocorundum and fly ash-based samples (results ranging from 6.1 to 4.8 MPa) compared to the reference sample (7.0 MPa). Only the geopolymer, which in its composition contained a mixture of electrocorundum with several grain gradations, showed an increase in flexural strength (7.3 MPa), compared to the reference sample. Additionally, surface topography analysis of the geopolymer samples was performed by scanning electron microscopy. The whole tests carried out on the above types of material indicate that it can be used as a substitute for sand in geopolymer mortars.]]>
<![CDATA[Tribo-mechanical behavior of geopolymer composites with wasted flax fibers]]> Mon, 18 Oct 2021 13:45:07 +0200 Bazan, Patrycja; Kozub, Barbara; Korniejenko, Kinga; Gailitis, Rihards; Sprince, Andina
rodzaj: materiały konferencyjne w czasopiśmie
Abstrakt: The paper presents the research results on the mechanical and tribological properties of geopolymers reinforced with natural fibers. As a matrix, conventional fly ash and dry construction sand in proportion 1:1 were used. Materials were activated with Na activator. Wasted flax tow in an amount of 0.25-1% by weight was introduced as a reinforcement. The test results showed that with the increase in the fiber content, the bending strength increases, while the compressive properties are comparable to the matrix material. Based on the obtained research results, the optimal content of flax tow was determined at the level of 0.5% by weight. In addition, the abrasion resistance of geopolymer composites was determined using the so-called Boehme shield. This test consists of measuring the change in sample height. The sample is placed on a disc sprinkled with abrasive powder, then pressed and put into rotation. The abrasion results showed that the addition of fibers in the form of waste pulps does not reduce the abrasion resistance, which should be considered as a positive effect. Research also revealed that wasted flax fibers could be successfully used as a reinforcing material in geopolymeric materials as an alternative to the utilization of waste fibers, and additionally may also have a positive effect on the mechanical and tribological properties of geopolymers materials.]]>
<![CDATA[Polymer-ceramic biocomposites based on hydroxyapatite/PVP/histidine for tissue engineering with drug-delivery function]]> Wed, 13 Oct 2021 15:46:47 +0200 Sobczak-Kupiec, Agnieszka; Tomala, Agnieszka Maria; López, Cristina Domínguez; Drabczyk, Anna; Tyliszczak, Bożena
rodzaj: materiały konferencyjne w czasopiśmie
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