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1
Content available remote The coupling effect of silica fume and basalt fibers on workability and residual strength capacities of traditional concrete before and after freeze–thaw cycles
Guler Soner, Akbulut Zehra Funda
Archives of Civil and Mechanical Engineering
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2023
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Vol. 23, no. 3
art. no. e173, 2023
EN
The combined use of silica fume (SF) and single and hybrid-basalt (BA) fibers can be a prominent option in diminishing the degradations of concrete after freeze–thaw (F–T) effects. This study investigated slump, mass loss (ML), abrasion loss (AL), residual compressive strength (RCS), and residual splitting tensile strength (RSTS) of SF and single- and hybrid-BA fiber-reinforced concrete after F–T cycles. The results demonstrated that although using SF and BA fibers together adversely affected the workability of the mixtures, they significantly improved the samples’ RCS and RSTS capacities. Besides, after F–T cycles, SF alone and with BA fibers are very efficient in reducing the AL of the samples. However, while using SF alone was somewhat effective in reducing the ML losses of the pieces, its use with single- and hybrid-BA fibers remained negligible. Furthermore, the hybrid use of BA fibers is more efficient in recovering concrete samples' workability and AL, RCS, and RSTS capacities than the single use. Compared to room conditions, after the 180 F–T cycles, the AL of the R0 control sample increased by 29.24%, while the SF and BA fiber-added R1–R7 samples ranged from 7.11% to 10.17%. Additionally, after the 180 F–T cycles, while the RSTS capacity of R0 control concrete decreased by 27.06%, the reduction in RSTS capacity of R1–R7 BA fiber-reinforced concrete ranged from 13.42% to 23.63%. This study is expected to constitute an important reference to the literature on how SF pozzolanic admixture and BA fiber additives play a role in improving the behavior of concrete against F–T cycles.
2
Odporność na działanie wody i mrozu mieszanek SMA z dodatkiem włókien bazaltowych – cz. I
Liphardt Adam
Magazyn Autostrady
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2021
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Nr 2
48--53
PL
W artykule przedstawiono wyniki przeprowadzonych badań określających wpływ zawartości dodatku w postaci włókien bazaltowych na właściwości mieszanki mineralno-asfaltowej typu SMA. Badania wytrzymałości na rozciąganie pośrednie oraz oceny wrażliwości na działanie wody i mrozu zostały przeprowadzone na mieszankach mineralno-asfaltowych z dodatkiem włókien.
EN
The article presents the results of tests determining the effect of an additive in the form of basalt fibers on the properties of an SMA-type asphalt mixture. The tests of indirect tensile strength and assessments of water and frost resistance were carried out on asphalt mixtures with the addition of the fibers.
3
Odporność na działanie wody i mrozu mieszanek SMA z dodatkiem włókien bazaltowych – cz. II
Mędra Adrian, Liphardt Adam
Magazyn Autostrady
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2021
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Nr 3
76--79
PL
W artykule przedstawiono wyniki przeprowadzonych badań określających wpływ zawartości dodatku w postaci włókien bazaltowych na właściwości mieszanki mineralno-asfaltowej typu SMA. Badania wytrzymałości na rozciąganie pośrednie oraz oceny wrażliwości na działanie wody i mrozu zostały przeprowadzone na mieszankach mineralno-asfaltowych z dodatkiem włókien.
EN
The article presents the results of tests determining the effect of an additive in the form of basalt fibers on the properties of a SMA-type asphalt mixture. The tests of indirect tensile strength and assessments of water and frost resistance were carried out on asphalt mixtures with the addition of fibers.
4
Content available Examination of Selected Thermal Properties of Basalt Composites
Miśkiewicz Pamela, Frydrych Iwona, Makówka Marcin
Fibres & Textiles in Eastern Europe
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2020
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Vol. 28, no. 2 (140)
103--109
EN
A composite based on basalt fabric was produced because of its good thermal and mechanical properties. As a result of the reactive magnetron sputtering technique, a layer of aluminium and zirconium (IV) oxide 200 nm thick was deposited on Mylar film, which was adhered to the surface of the basalt fabric using a special adhesive glue and silicone. The variants of composites prepared were subjected to contact resistance tests at a contact temperature of 100 °C and 250 °C, as well as to resistance to thermal radiation tests. The tests carried out on the composites obtained showed an improvement of tested parameters.
PL
W pracy wytworzono kompozyt na bazie tkaniny bazaltowej ze względu na jej dobre właściwości termiczne i mechaniczne. W wyniku zastosowania techniki reaktywnego rozpylania magnetronowego na folii Mylar osadzono warstwę aluminium i tlenku cyrkonu o grubości 200 nanometrów, którą przyklejono na powierzchnię tkaniny bazaltowej poprzez zastosowywanie kleju oraz silikonu. Przygotowane warianty kompozytów poddano badaniom odporności na ciepło kontaktowe dla temperatury kontaktu 100 °C i 250 °C oraz odporności na promieniowanie cieplne. Przeprowadzone na kompozytach badania wykazały poprawę badanych parametrów.
5
Content available Analysis of deflection and cracking of concrete beams with non-metallic reinforcement
Kosior-Kazberuk Marta, Krassowska Julita
System Safety : Human - Technical Facility - Environment
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2019
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Vol. 1, nr 1
782--789
EN
The composite bars have become a useful substitute for conventional reinforcement in civil engineering structures for which load capacity and resistance to influences of environmental factors' are required. Considering the requirements of responsible design of engineering structures with particular emphasis on durability, the use of non-metallic reinforcement in reinforced structural elements allows to reduce the costs related to erection of buildings, as well as the costs of building maintenance and renovations. The behaviour of model beams made of concrete reinforced with composite bars (fiber reinforced polymer bars) in three-point bending test was analyzed. The strength parameters of composite bars were tested. The bending capacity, deformation of concrete, and beam deflection were determined. Crack propagation in the model beams under load was analyzed using the Aramis 5M optical measuring system. Due to the strength characteristics of the composite reinforcing bars, the beams exhibited significant tensile strains, which resulted in the development of cracks of considerable width.
6
Content available remote Modification of Surface of Basalt Fabric on Protecting Against High Temperatures by the Method of Magnetron Sputtering
Miśkiewicz Pamela, Frydrych Iwona, Pawlak Wojciech, Cichocka Agnieszka
Autex Research Journal
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2019
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Vol. 19, no. 1
36--43
EN
Basalt fibers and fabrics made of these are characterized by excellent thermal and mechanical properties. Therefore, basalt fabrics, due to a good resistance to high temper atures, are frequently applied in the personal protection equipment (PPE). In order to improve their thermal properties and, above all, the contact heat resistance, the process of physical vapor deposition was proposed. The process of Physical Vapor Deposition (PVD) involves producing a coating on a specific substrate as a result of physical deposition of molecules, ions or atoms of the selected chemical compounds. The method selected for the test is the magnetron sputtering. It involves depositing a uniform film of chromium on the surface of the basalt fabric. In order to improve the thermal properties – especially the contact heat resistance, two values of thickness of the chromium layer deposited on the basalt fabric surface were adopted for the test. Covering 1 μm and 5 μm with the chromium layer did not fulfil the expectations and the research will be continued.
7
Content available Shear behavior of steel or basalt fiber reinforced concrete beams without stirrup reinforcement
Krassowska J., Kosior-Kazberuk M.
Technical Sciences / University of Warmia and Mazury in Olsztyn
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2017
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nr 20(4)
391--404
EN
The paper presents the results of a comprehensive investigation aimed at studying the shear behavior of basalt or steel fiber-reinforced concrete (BFRC or SFRC) beams, as well as analyzing the possibility of using basalt or steel fibers as a minimum shear reinforcement. Two-span reinforced concrete beams with the cross-section of 8×16 cm and length of 200 cm and diversified spacing of stirrups were tested. Steel stirrups or alternatively steel or basalt fibers were used as a shear reinforcement. Steel fiber content was 80 and 120 kg/m3 and basalt fiber content was 2.5 and 5.0 kg/m3 . The shear behavior and/or bending capacity of SFRC and BFRC beams were studied. The result indicated that fibers can be safely used as a minimum shear reinforcement.
8
Content available Kompozyty hybrydowe na osnowie polilaktydu z włóknami węglowymi i bazaltowymi
Kuciel S., Kornobis M.
Przetwórstwo Tworzyw
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2017
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T. 23, Nr 4 (178)
344--350
PL
Kompozyty hybrydowe na osnowie biodegradowalnego polilaktydu wytworzono metodą wtryskiwania z włóknami węglowymi i bazaltowymi o równowagowym udziale 7,5% i 12,5% w Zakładach Azotowych w Tarnowie. Wykonano przegląd dostępnej literatury oraz przeprowadzono szereg badań wytrzymałościowych zgodnych z Polskimi Normami. Badania te obejmowały statyczną próbę rozciągania i zginania oraz oznaczanie udarności wg Charpy’ego. Wykonano je w zmiennych temperaturach (-24, 20 i 60°C) oraz po próbie degradacji hydrolitycznej prowadzonej przez 21 dni. Za pomocą skaningowego mikroskopu elektronowego wykonano zdjęcia mikrostruktury na przełomach próbek rozciąganych. Właściwości hybrydowych kompozycji z włóknami węglowymi i bazaltowymi na osnowie polilaktydu są znacznie lepsze niż porównywalnych kompozycji z włóknem szklanym, wzrasta wytrzymałość, sztywność oraz udarność.
EN
Hybrid composites on biodegradable polylactide matrix with carbon and basalt fibers in equilibrium participation 7,5% and 12,5% were produced by molding injection in Zakłady Azotowe in Tarnow. To investigate the properties of this composition has been review of the literature and conducted series research on the strength samples according to Polish Standards. These research included: tensile test, bend test and Charpy impact test. They were done in variable temperatures (-24, 20 and 60 Celsius degree) and after hydrolytic biodegradation of materials, which lasted 21 days. We were taken photos to check fracture samples after tensile test using scanning electron microscope. The properties of hybrid composites with carbon and basalt fibers on the polylactide base are much better than comparable composites with glass fibers, increasing durability, stiffness and impact strength.
9
Content available remote Kompozyty kauczuku butadienowo-styrenowego napełnione włóknem jako materiał uszczelnień instalacji solarnych
Hassa-Żałoba A., Tomaszewska M., Bieliński D. M., Piątkowska A.
Elastomery
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2015
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T. 19, nr 1
23--32
PL
Obiektem badań byly napełnione sadzą mieszanki na podstawie kauczuku butadienowo-styrenowego, do których wprowadzano włókna bazaltowe i/lub pulpę aramidową w celu umożliwienia zastosowania ich wulkanizatów jako materiały na uszczelnienia w instalacjach solarnych. Dobrano rodzaj użytego jako środek adhezyjny silanu, ilość oraz najkorzystniejszy sposób jego aplikacji do mieszanki kauczukowej. Zbadano wpływ ilości i rodzaju włókien oraz silanu na parametry wulkametryczne oraz właściwoąścii mechaniczne i odporność kompozytów na działanie płynu solarnego w podwyższonej temperaturze. Najlepsze rezultaty osiągnięto w przypadku zastosowania obydwu rodzajów włókien w sumarycznej ilości 15 cz. wag./lOO cz. wag. kauczuku. Pulpa aramidowa została poddana wcześniejszej impregnacji silanem, natomiast poprawe adhezji włókna bazaltowego do kauczuku zapewniono poprzez dodatek silanu bezpośrednio do mieszanki kauczukowej na etapie jej sporządzania.
EN
The aim of our study were carbon black filled rubber blends based on styrene-butadiene rubber. We tried to incorporate to these blends bazalt and/or aramide fibers in order to make possible application of the vulcanizates as materials suitable for production of seals working in solar energy systems. In the work the kind of silane, the amount and the best way of application of silane coupling agent to the rubber blends were selected. The influence of the amount of fibers and silane on parameters of vulcanization, mechanical properties and the resistance of the composites to the action of solar medium at elevated temperature, were studied. The best results were obtained in the case of application of both kinds of fibers in a moderate total amount of 15 phr. Aramide pulp had been, prior to its application, subjected to silane impregnation. In case of basalt fibbers silane was added directed to rubber matrix.
10
Content available remote Exploration of univariate data in the textile metrology
Militky J., Meloun M.
Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka
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2000
|
z. 58
165-173
EN
The main aim of data analysis in textile metrology is the extraction of relevant information from measurements. This contribution is focused to most frequent task, i.e univariate data treatment based on the analysis of experimentally determined values Xi, i=1,...N. The system of exploratory data analysis based on concept of quantile estimation is proposed. The main part of this contribution is devoted to the description of several graphical tools for data summarization and exploration. Selected techniques are used for analysis of the strength of basalt fibers at small gauge length. The program package ADSTAT for realization of the above-mentioned techniques is briefly described.
11
Content available remote Data based probability models in the textile metrology
Militky J., Meloun M.
Zeszyty Naukowe. Włókiennictwo / Politechnika Łódzka
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2000
|
z. 58
155-164
EN
The main aim of data analysis in textile metrology is the extraction of relevant information from measurements and creation of probability models. This contribution is focused to most frequent task, i.e univariate data treatment based on the analysis of experimentally determined values Xi, i=1,...N. The main part of this contribution is devoted to the description and camparison of data distribution with theoretical ones. Selected techniques are used for analysis of the strength of basalt fibers at small gauge length.
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