Mechanical Properties of a 3D Printed Wall Segment Made with an Earthen Mixture

This study provides a contribution to the research field of 3D printed earthen buildings, focusing, for the first time, on the load-bearing capacity of these structures. The study involves the entire production and testing process of the earthen elements, from design, to the preparation of the mixture and the 3D printing, up to the uniaxial compression test on a wall segment. The results indicate that 3D printed earthen elements have a compressive strength of 2.32 MPa, comparable to that of rammed earth structures. The experimental data also made it possible to draw conclusions on the action of the infill, which seems to have the function of stopping the propagation of cracks. This has a positive effect on the overall behavior of 3D printed earthen elements, since it avoids the onset of dilative behavior in the final stages of the load test and maintains ultimate load values higher than 50% of the maximum load.

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Mechanical Properties of a 3D-Printed Wall Segment Made with an Earthen Mixture

Materials ◽

10.3390/ma15020438 ◽

2022 ◽

Vol 15 (2) ◽

pp. 438

Author(s):

Elena Ferretti ◽

Massimo Moretti ◽

Alberto Chiusoli ◽

Lapo Naldoni ◽

Francesco De Fabritiis ◽

...

Keyword(s):

Ultimate Load ◽

Maximum Load ◽

Research Field ◽

Load Test ◽

Uniaxial Compression Test ◽

Earth Structures ◽

3D Printed ◽

First Time ◽

Earthen Buildings ◽

Positive Effect

This study provides a contribution to the research field of 3D-printed earthen buildings, focusing, for the first time, on the load-bearing capacity of these structures. The study involves the entire production and testing process of the earthen elements, from the design, to the preparation of the mixture and the 3D printing, up to the uniaxial compression test on a wall segment. The results indicate that 3D-printed earthen elements have a compressive strength of 2.32 MPa, comparable to that of rammed earth structures. The experimental data also made it possible to draw conclusions on the action of the infill, which seems to have the function of stopping the propagation of cracks. This has a positive effect on the overall behavior of 3D-printed earthen elements, since it avoids the onset of dilative behavior in the final stages of the load test and maintains ultimate load values higher than 50% of the maximum load.

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Evaluation of Static Pile Load Test Results of Ultimate Bearing Capacity by Interpreting Methods

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/961/1/012013 ◽

2022 ◽

Vol 961 (1) ◽

pp. 012013

Author(s):

Raghad Adel ◽

Ressol R. Shakir

Keyword(s):

Bearing Capacity ◽

Ultimate Load ◽

Failure Load ◽

Maximum Load ◽

Load Test ◽

Deep Foundations ◽

Code Of Practice ◽

Pile Load Test ◽

Pile Load Tests ◽

Ultimate Load Carrying Capacity

Abstract in geotechnical engineering, foundation piles are ideal for deep foundations that cannot bear higher loads. This architectural expansion places a great deal of responsibility on the engineer to anticipate the appropriate load for the constructor. Unfortunately, calculations of the pile’s bearing capacity are not accessible. It has always been a source of concern for geotechnical engineers, as the structure’s safety depends on the pile’s bearing capacity and gives it a safe value. These research tests are previously known pile load test data from several locations in Nasiriyah to determine the ultimate load-carrying capacity using various interpreting methodologies. A database that was used to test the pile load for three different areas in Nasiriyah, southern Iraq: The Main Drain River Bridge Project, the Al-Eskan Interchange Project, and the Al-Hawra Hospital, as determined by analytical methods, as well as evaluating the final loading values resulting from the methods used, by ASTM D-1143, American and British Standard Code of Practice BS 800. The final capacity for the pile bearing is estimated using these approaches, which are depicted in the form of a graph-based on field data. Chin-Kondner and Brinch Hansen algorithms anticipate the highest failure load for all piles based on the comparison. On average, Chin–Kondner’s ultimate load is 22% higher than Hansen’s maximum load for the 22 pile load tests. Decourt and DeBeer, and Mazurkiewicz’s techniques yielded the closest average failure load. Buttler-Hoy approach yielded the smallest failure load.

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UV Inscription and Pressure Induced Long-Period Gratings through 3D Printed Amplitude Masks

Sensors ◽

10.3390/s21061977 ◽

2021 ◽

Vol 21 (6) ◽

pp. 1977

Author(s):

Ricardo Oliveira ◽

Liliana M. Sousa ◽

Ana M. Rocha ◽

Rogério Nogueira ◽

Lúcia Bilro

Keyword(s):

State Of The Art ◽

Low Cost ◽

Resonance Wavelength ◽

Complex Structures ◽

Pressing Method ◽

Long Period ◽

Long Period Gratings ◽

3D Printed ◽

Mechanical Pressing ◽

First Time

In this work, we demonstrate for the first time the capability to inscribe long-period gratings (LPGs) with UV radiation using simple and low cost amplitude masks fabricated with a consumer grade 3D printer. The spectrum obtained for a grating with 690 µm period and 38 mm length presented good quality, showing sharp resonances (i.e., 3 dB bandwidth < 3 nm), low out-of-band loss (~0.2 dB), and dip losses up to 18 dB. Furthermore, the capability to select the resonance wavelength has been demonstrated using different amplitude mask periods. The customization of the masks makes it possible to fabricate gratings with complex structures. Additionally, the simplicity in 3D printing an amplitude mask solves the problem of the lack of amplitude masks on the market and avoids the use of high resolution motorized stages, as is the case of the point-by-point technique. Finally, the 3D printed masks were also used to induce LPGs using the mechanical pressing method. Due to the better resolution of these masks compared to ones described on the state of the art, we were able to induce gratings with higher quality, such as low out-of-band loss (0.6 dB), reduced spectral ripples, and narrow bandwidths (~3 nm).

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Strengthening of RCC Beams in Shear by Using SBR Polymer-Modified Ferrocement Jacketing Technique

Advances in Civil Engineering ◽

10.1155/2018/4028186 ◽

2018 ◽

Vol 2018 ◽

pp. 1-16 ◽

Cited By ~ 1

Author(s):

Rajinder Ghai ◽

Prem Pal Bansal ◽

Maneek Kumar

Keyword(s):

Carrying Capacity ◽

Shear Failure ◽

Ultimate Load ◽

Load Test ◽

Wire Mesh ◽

Styrene Butadiene Rubber ◽

Shear Load ◽

Butadiene Rubber ◽

Load Carrying Capacity ◽

Load Carrying

There is a common phenomenon of shear failure in RCC beams, especially in old buildings and bridges. Any possible strengthening of such beams is needed to be explored that could strengthen and make them fit for serviceable conditions. The present research has been made to determine the performance of predamaged beams strengthened with three-layered wire mesh polymer-modified ferrocement (PMF) with 15% styrene-butadiene-rubber latex (SBR) polymer. Forty-eight shear-designed and shear-deficient real-size beams were used in this experimental work. Ultimate shear load-carrying capacity of control beams was found at two different shear-span (a/d) ratios 1 and 3. The sets of remaining beams were loaded with different predetermined damage levels of 45%, 75%, and 95% of the ultimate load values and then strengthened with 20 mm thick PMF. The strengthened beams were then again tested for ultimate load-carrying capacity by conducting the shear load test at a/d = 1 and 3. As a result, the PMF-strengthened beams showed restoration and enhancement of ultimate shear load-carrying capacity by 5.90% to 12.03%. The ductility of strengthened beams was improved, and hence, the corresponding deflections were prolonged. On the other hand, the cracking pattern of PMF-strengthened beams was also improved remarkably.

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Wheat Bread with Grape Seeds Micropowder: Impact on Dough Rheology and Bread Properties

Applied Rheology ◽

10.1515/arh-2020-0112 ◽

2020 ◽

Vol 30 (1) ◽

pp. 138-150

Author(s):

Veronika Valková ◽

Hana Ďúranová ◽

Jana Štefániková ◽

Michal Miškeje ◽

Marián Tokár ◽

...

Keyword(s):

Wheat Flour ◽

Dough Rheology ◽

Wheat Bread ◽

Grape Seeds ◽

Rheological Analysis ◽

First Time ◽

Positive Effect ◽

Bread Properties ◽

Electronic Eye ◽

Different Levels

AbstractThe current study was designed to enhance the functionality of white bread by replacement of wheat flour with different levels (1%, 2%, 5%, and 8%) of grape seeds micropowder (GSMP) with nanosized particles (10 µm). Chemical composition of GSMP, volume and sensory attributes, evaluated with the panel of evaluators and an electronic nose (e-nose) and an electronic eye (e-eye) were investigated in the tested breads. It has been found out that GSMP contained appreciable amounts of flavonoids including catechin, epicatechin, gallic acid and minerals especially, Ca, K and Mg. The data from rheological analysis showed that the addition of GSMP (mainly at 5% and 8% levels) to the wheat flour had a positive effect on dough manifesting with rheology by increased dough stability. The volume of the experimental breads (above 1% concentration) was demonstrably declined (P < 0.0001) in comparison with the control bread. Sensory rating revealed that the bread fortified with 1% GSMP was judged by the consumer panelists as the most acceptable with the highest scores for all quality attributes which was also confirmed by the data of e-nose and e-eye. Our results suggest for the first time that 1% GSMP addition appears to be a promising functional ingredient to improve bread with required qualitative and sensory properties.

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Geotechnical Investigation, Field Load Test and Analysis of Full-Scale Bored Pile

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.813-814.1126 ◽

2015 ◽

Vol 813-814 ◽

pp. 1126-1130

Author(s):

G. Kesavan ◽

S.S. Chandrasekaran

Keyword(s):

Tamil Nadu ◽

Ground Level ◽

Maximum Load ◽

Field Investigation ◽

Complex Problem ◽

Load Test ◽

Bored Pile ◽

Economical Design ◽

Pile Load Test ◽

A Site

The maximum load carrying capacity of bored piles is a complex problem because it is a function of a number of factors, these factors include methods of soil exploration, ground water condition, types of grading of concrete, quantity and quality of concrete. The knowledge of Geotechnical test is important for the most economical design of the piles. This paper describes some important aspects of field investigation, design and construction of in-situ bored pile foundation, field pile load test of experience gained from the construction of the pile at a site in Aathoor in Tamil Nadu, India. The site was fully sandy soil from existing ground level. The design of bored pile under axial compression was done using Empirical formula, pile load test and by using PLAXIS 2D software. Results were compared with vertical load and settlement in this site.

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Structure and Strength of Artificial Soils Containing Monomineral Clay Fractions

Materials ◽

10.3390/ma14164688 ◽

2021 ◽

Vol 14 (16) ◽

pp. 4688

Author(s):

Grzegorz Jozefaciuk ◽

Kamil Skic ◽

Agnieszka Adamczuk ◽

Patrycja Boguta ◽

Krzysztof Lamorski

Keyword(s):

Fine Particles ◽

Structural Parameters ◽

Fractal Dimensions ◽

Soil Strength ◽

Uniaxial Compression Test ◽

Mineral Particle ◽

Type Curve ◽

Surface Fractal ◽

First Time

Structure and strength are responsible for soil physical properties. This paper determines in a uniaxial compression test the strength of artificial soils containing different proportions of various clay-size minerals (cementing agents) and silt-size feldspar/quartz (skeletal particles). A novel empirical model relating the maximum stress and the Young’s modulus to the mineral content basing on the Langmuir-type curve was proposed. By using mercury intrusion porosimetry (MIP), bulk density (BD), and scanning electron microscopy (SEM), structural parameters influencing the strength of the soils were estimated and related to mechanical parameters. Size and shape of particles are considered as primary factors responsible for soil strength. In our experiments, the soil strength depended primarily on the location of fine particles in respect to silt grains and then, on a mineral particle size. The surface fractal dimension of mineral particles played a role of a shape parameter governing soil strength. Soils containing minerals of higher surface fractal dimensions (rougher surfaces) were more mechanically resistant. The two latter findings appear to be recognized herein for the first time.

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N.G. JUSOITY AS A THEORETIC AND PRACTICE OF ART TRANSLATION

Kavkaz-forum ◽

10.46698/i3439-9520-7432-l ◽

2020 ◽

Author(s):

Л.Б. ДЗАПАРОВА

Keyword(s):

Research Field ◽

Theory And Practice ◽

Literary Translation ◽

Theoretical Understanding ◽

Semantic Level ◽

Literary Journals ◽

Poetic Translation ◽

Problems Of Translation ◽

First Time

Проблемы теории и практики художественного перевода как феномена межкультурной коммуникации в наше время актуализируются в современной филологической науке. Расширяется исследовательское поле в этой области научного знания для переводоведов и всех, кто интересуется проблемами диалога культур. Выбор темы исследования обусловлен и прошедшим в этом году 95-летим юбилеем известного осетинского поэта, драматурга, литературоведа Нафи Григорьевича Джусойты. В статье рассматривается вклад народного писателя Осетии в теоретическое осмысление проблем художественного перевода; впервые анализируется одно из самых сложных для перевода стихотворений А.С. Пушкина «Пророк» в интерпретации Н. Джусойты. В частности, автором в статье представлен анализ опубликованных Джусойты на страницах центральных литературных журналов дискуссионных работ по наиболее актуальным проблемам переводоведения. В них Джусойты фокусирует внимание на вопросах верности перевода оригиналу, повышения качества подстрочников, новаторства и модернизации классических произведений; обуславливает важность переводческого чтения в процессе постижения оригинала; определяет специфику поэтического перевода; выступает против украшательства в переводе, демонстрации на всесоюзном уровне слабых оригиналов и несовершенных переводов. В целом, Джусойты, полемизируя с известными теоретиками, предлагает свою концепцию перевода, начиная от выбора произведения и до конечного результата – текста на другом языке. Перед нами круг проблем, которые до сих пор волнуют специалистов по художественному переводу. Автором статьи также представлен сравнительно-сопоставительный анализ стихотворения А. Пушкина в оригинале и в переводческой интерпретации Н.Г. Джусойты. Сличение текстов на смысловом уровне показало стремление Джусойты найти художественные средства, которые помогают раскрыть основной образ. Но не везде раскрыт двуплановый смысл, запечатленный в лексических единицах исходного языка. The problems of the theory and practice of literary translation as a phenomenon of intercultural communication are still actualized in modern philological science. The research field in this area of scientific knowledge is expanding for translators and those interested in the problems of the dialogue of cultures. The choice of the research topic was also conditioned by the 95th anniversary of the famous Ossetian poet, playwright, literary critic Nafi Grigorievich Jusoyty, celebrated this year. The article examines the contribution of the people’s writer of Ossetia to the theoretical understanding of the problems of literary translation; for the first time one of the most difficult poems for translation by A.S. Pushkin’s «Prophet» in the interpretation of N. Jusoyty is reviewed. In particular, the author in the article presents an analysis of the discussion papers published by Jusoyty on the pages of central literary journals on the most pressing problems of translation studies. In them, Jusoyty focuses on the issues of closeness to the original, improving the quality of interlinear translations, innovation and modernization of classical works; determines the importance of translation reading in the process of comprehending the original; determines the specifics of poetic translation; opposes embellishment in translation, the demonstration of weak originals and imperfect translations at the all-Union level. In general, Jusoyty, arguing with well-known theorists, offers his own concept of translation, starting from the choice of a work and up to the final result – a text in another language. We are faced with a range of problems that still concern specialists in literary translation. The author of the article also presents a comparative analysis of A. Pushkin’s poem in the original and in t/he translation interpretation of N.G. Jusoyty. Comparison of the texts at the semantic level showed Jusoyty’s desire to find close artistic means that help to reveal the main image. But not everywhere is disclosed the two-dimensional meaning embodied in the lexical units of the source language.

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Постать Вільгельма фон Габсбурга (Василя Вишиваного) у спогадах і історичних дослідженнях XX – поч. XXI ст.

Galicja Studia i materiały ◽

10.15584/galisim.2021.7.16 ◽

2021 ◽

Vol 7 ◽

pp. 316-326

Author(s):

Лідія Лазурко ◽

Keyword(s):

National Identity ◽

Research Field ◽

Main Issue ◽

History Of ◽

The Will ◽

First Time

The purpose of the research – is to demonstrate how the historiographic image of Wilhelm von Habsburg, known as Colonel Vasyl Vyshyvanyi, was constructed on the basis of sources of personal origin and historiography materials that were deposited during the XX century. In the first time in historiography shown as the as the story of the Austrian archduke, who decided to change his national identity and chose for himself the image of a fighter for the will of Ukraine, unfolded and mythologized. The history of the life of the Austrian Archduke Wilhelm von Habsburg-Lötringen has in recent years been enriched by a number of thorough studies. The main issue of this research was the question of choosing a Ukrainian national identity. The construction of the Ukrainian legend Vasyl Vyshyvany in the historiography began, based on his own autobiography. As the accumulation of source and scientific material, the question of the vision of the hero evolved: from explaining the circumstances of change of national self-identification to exploring the motives of this step. Changes in the interpretation of this issue were also outlined and brought to the cultural and philosophical research field.

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The Influence of Bee Venom Melittin on the Functioning of the Immune System and the Contractile Activity of the Insect Heart—A Preliminary Study

Toxins ◽

10.3390/toxins11090494 ◽

2019 ◽

Vol 11 (9) ◽

pp. 494 ◽

Cited By ~ 5

Author(s):

Jan Lubawy ◽

Arkadiusz Urbański ◽

Lucyna Mrówczyńska ◽

Eliza Matuszewska ◽

Agata Światły-Błaszkiewicz ◽

...

Keyword(s):

Immune System ◽

Contractile Activity ◽

Model Organism ◽

Dependent Manner ◽

Physiological Studies ◽

Almost All ◽

First Time ◽

Dose Dependent ◽

Positive Effect

Melittin (MEL) is a basic polypeptide originally purified from honeybee venom. MEL exhibits a broad spectrum of biological activity. However, almost all studies on MEL activity have been carried out on vertebrate models or cell lines. Recently, due to cheap breeding and the possibility of extrapolating the results of the research to vertebrates, insects have been used for various bioassays and comparative physiological studies. For these reasons, it is valuable to examine the influence of melittin on insect physiology. Here, for the first time, we report the immunotropic and cardiotropic effects of melittin on the beetle Tenebrio molitor as a model insect. After melittin injection at 10−7 M and 10−3 M, the number of apoptotic cells in the haemolymph increased in a dose-dependent manner. The pro-apoptotic action of MEL was likely compensated by increasing the total number of haemocytes. However, the injection of MEL did not cause any changes in the percent of phagocytic haemocytes or in the phenoloxidase activity. In an in vitro bioassay with a semi-isolated Tenebrio heart, MEL induced a slight chronotropic-positive effect only at a higher concentration (10−4 M). Preliminary results indicated that melittin exerts pleiotropic effects on the functioning of the immune system and the endogenous contractile activity of the heart. Some of the induced responses in T. molitor resemble the reactions observed in vertebrate models. Therefore, the T. molitor beetle may be a convenient invertebrate model organism for comparative physiological studies and for the identification of new properties and mechanisms of action of melittin and related compounds.

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