Moisture Influence on Compressive Strength of Calcium Silicate Masonry Units–Experimental Assessment and Normative Calculations

This paper primarily assesses the scale of adverse changes to the compressive strength of different types of silicates due to the influence of moisture. The study covers three groups of silicate units of different strength classes—15, 20 and 25—obtained from three different manufacturers. It was demonstrated that in all studied groups, moisture significantly decreased the compressive strength by about 30–40%. In addition, microstructural studies were conducted to analyze the relationship between the specific porosity structure of each group of silicate bricks and their compressive strength. On the basis of SEM (Scanning Electron Microscopy) and EDS (Electron Dispersive Spectroscopy) analysis, the elemental composition of individual silicates was determined and the contact zone between the aggregate and the binder was determined, which largely influenced the obtained compressive strength of each silicates. Next, the study referred to the utility of the normative procedure used to determine the strength class of samples with different geometries and at different moisture concentrations. The results of the calculations showed the high accuracy of the normative-based assessment of strength class, regardless of the manufacturer and the moisture values during examination.

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Petrographic and Mechanical Characteristics of Concrete Produced by Different Type of Recycled Materials

Geosciences ◽

10.3390/geosciences9060264 ◽

2019 ◽

Vol 9 (6) ◽

pp. 264 ◽

Cited By ~ 8

Author(s):

Petros Petrounias ◽

Panagiota P. Giannakopoulou ◽

Aikaterini Rogkala ◽

Paraskevi Lampropoulou ◽

Basilios Tsikouras ◽

...

Keyword(s):

Compressive Strength ◽

Mechanical Characteristics ◽

Strength Class ◽

Concrete Strength ◽

Glass Waste ◽

Recycled Materials ◽

Curing Conditions ◽

Different Types ◽

Green Glass ◽

Water Saturated

This paper examined three different types of recycled materials, such as beer green glass, waste tile, and asphalt, which will be used in different mixtures in order to prepare concrete specimens and, more specifically, their effect on concrete strength and how the petrographic characteristics of various recycled materials influenced the durability of C25/30 strength class concrete. Particular emphasis was placed on the effect of artificial microroughness of glassy and smooth surfaces of recycled materials on their final concrete strength. The concrete strength values do not show great variance, but their limited differences have been qualitatively interpreted by a new promising petrographic methodology, including the study of the surface texture of the used aggregate materials. Concretes are produced with constant volume proportions, workability, mixing, and curing conditions while using different sizes of each aggregate type. The aggregates were mixed both in dry and water saturated states in concretes. Concretes that are made by a mixture of beer green glass with quartz primer, as well as of tile with quartz primer, presented the optimum possible results of the compressive strength.

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Effect of Hydration Products Transformation for Compressive Strength of Autoclaved Silicate Products

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.3644 ◽

2012 ◽

Vol 204-208 ◽

pp. 3644-3647

Author(s):

Chang Jun Ke ◽

Shu Ying Wang ◽

Jun Li Liu

Keyword(s):

Compressive Strength ◽

Steam Pressure ◽

Diffraction Peak ◽

Saturated Steam ◽

Hydration Products ◽

X Ray Diffraction ◽

Spectroscopy Analysis ◽

X Ray ◽

Diffraction Peaks ◽

The Relationship

the relationship between hydration products transformation and the compressive strength was studied with X-ray diffraction, infrared spectroscopy analysis. The results showed, 0.505nm hydrogarnets diffraction peaks weakened and 0.183nm CSH diffraction peak enhanced with different autoclaved time under 1.2MPa saturated steam pressure. 0.505nm hydrogarnets diffraction peak enhanced under lower saturated steam pressure for autoclaving 6h, then weaken under higher saturated steam pressure. And 0.183nm CSH diffraction peaks enhanced with different saturated steam pressure for autoclaving 6h. During autoclaving, hydrogarnet translate into Al-substituted calcium silicate hydrate (C-S-H). Transformation of hydration products is favorable for compressive strength of autoclaved sample.

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Evaluation of the Modulus of Elasticity of Different Types of Concrete Compared with Eurocode 2

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.677.181 ◽

2016 ◽

Vol 677 ◽

pp. 181-185

Author(s):

Klára Křížová ◽

Rudolf Hela

Keyword(s):

Compressive Strength ◽

Modulus Of Elasticity ◽

Strength Class ◽

Raw Materials ◽

Concrete Strength ◽

Experimental Part ◽

Static Modulus ◽

Eurocode 2 ◽

Different Types ◽

Static Modulus Of Elasticity

The comparison of really measured compressive strength static modulus of elasticity with table values stated in Eurocode 2 is essential part of the paper. Since the standard draws from modulus of elasticity - concrete strength class, the set compressive strengths will be classified in concrete particular classes. Experimental part was based on several concrete design compositions differing in particular input raw-materials. Monitored values were set with concretes in different ages with final value 180 days. The experiment tries to demonstrate the impossibility of static modulus of elasticity derivation from table values which do not match the present-date produced concretes.

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An evaluation of ECT sample height for small flute board grades and Box Manufacturer’s Certification compliance

TAPPI Journal ◽

10.32964/tj8.6.24 ◽

2009 ◽

Vol 8 (6) ◽

pp. 24-28

Author(s):

CORY JAY WILSON ◽

BENJAMIN FRANK

Keyword(s):

Compressive Strength ◽

Compressive Load ◽

Test Sample ◽

Test Methods ◽

Test Method ◽

Initial Development ◽

Sample Height ◽

Relationship Of ◽

The Relationship ◽

Corrugated Fiberboard

TAPPI test T811 is the specified method to ascertain ECT relative to box manufacturer’s certification compliance of corrugated fiberboard under Rule 41/ Alternate Item 222. T811 test sample heights were derived from typical board constructions at the time of the test method’s initial development. New, smaller flute sizes have since been developed, and the use of lighter weight boards has become more common. The T811 test method includes sample specifications for typical A-flute, B-flute, and C-flute singlewall (and doublewall and triplewall) structures, but not for newer thinner E-flute or F-flute structures. This research explores the relationship of ECT sample height to measured compressive load, in an effort to determine valid E-flute and F-flute ECT sample heights for use with the T811 method. Through this process, it identifies challenges present in our use of current ECT test methods as a measure of intrinsic compressive strength for smaller flute structures. The data does not support the use of TAPPI T 811 for ECT measurement for E and F flute structures, and demonstrates inconsistencies with current height specifi-cations for some lightweight B flute.

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Squeak and rattle noise classification using radial basis function neural networks

Noise Control Engineering Journal ◽

10.3397/1/376824 ◽

2020 ◽

Vol 68 (4) ◽

pp. 283-293

Author(s):

Oleksandr Pogorilyi ◽

Mohammad Fard ◽

John Davy ◽

Mechanical and Automotive Engineering, School ◽

...

Keyword(s):

Neural Network ◽

Neural Networks ◽

High Accuracy ◽

Training Method ◽

Vehicle Interior ◽

Trained Classifier ◽

Different Types ◽

Noise Classification ◽

Automatic Tool ◽

Multi Class Classification

In this article, an artificial neural network is proposed to classify short audio sequences of squeak and rattle (S&R) noises. The aim of the classification is to see how accurately the trained classifier can recognize different types of S&R sounds. Having a high accuracy model that can recognize audible S&R noises could help to build an automatic tool able to identify unpleasant vehicle interior sounds in a matter of seconds from a short audio recording of the sounds. In this article, the training method of the classifier is proposed, and the results show that the trained model can identify various classes of S&R noises: simple (binary clas- sification) and complex ones (multi class classification).

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THEORY OF LAW AND PHILOSOPHY OF LAW AS THEORETICAL DISCOURSES: SPECIFICS AND RELATIONSHIP

Vestnik Samarskogo iuridicheskogo instituta ◽

10.37523/sui.2020.40.4.001 ◽

2020 ◽

pp. 9-17

Author(s):

Вадим Леонидович Афанасьевский

Keyword(s):

Scientific Knowledge ◽

Scientific Theory ◽

Theoretical Concept ◽

Philosophy Of Law ◽

The West ◽

Scientific Creativity ◽

Key Characteristics ◽

Different Types ◽

Theory Of Law ◽

The Relationship

В статье анализируется проблема взаимоотношений философии права и научной теории права. Рассматриваемая проблема стала особенно актуальной в российском образовательном пространстве в связи с введением после длительного перерыва в государственный образовательный стандарт магистратуры по юриспруденции учебной дисциплины «Философия права». Автор статьи в качестве базисного принимает тезис, согласно которому философия права, являясь сферой философской мысли, и теория права как область научного социогуманитарного знания представляют собой разные типы теоретического дискурса. Исходя из этого, в статье выстраивается теоретическая концепция, согласно которой задачей философии права как философского типа мышления является конструирование или экспликация онтологических, эпистемологических, аксиологических, феноменологических оснований для формирования и функционирования научных теоретико-правовых и историко-правовых построений. Для реализации поставленной в статье задачи подробно рассматриваются ключевые характеристики как теории философского типа, так и идеалов, норм и характеристик научного знания. Выявленное различие экстраполируется на взаимоотношение теории права как продукта научного творчества и философии права как конструкции, задающей базовые мировоззренческие смыслы. В качестве примера выработанных философией права и государства оснований научных теорий прогресса, государства, морали и права, автор приводит взгляды мыслителей западноевропейской философской классики: Т. Гоббса, Ж.-Ж. Руссо, И. Канта, Г.В.Ф. Гегеля. Именно их философские концепции предопределили образы теоретико- и историко-правовых учений XVIII, XIX, XX и даже начала XXI в. Таким образом, отношение философии права и теории права выстраивается по «вертикали»: от онтологического основания к возведению теоретико-правовых и историко-правовых научных построений. The article analyzes the problem of the relationship between the philosophy of law and the scientific theory of law. The problem under consideration has become especially urgent in the Russian educational space in connection with the introduction of the Philosophy of Law discipline master's degree in law after a long break. The author of the article takes as the basis the thesis that the philosophy of law, being the sphere of philosophical thought, and the theory of law as a field of scientific socio-humanitarian knowledge are different types of theoretical discourse. Based on this, the article builds a theoretical concept according to which the task of the philosophy of law as a philosophical type of thinking is the construction or explication of ontological, epistemological, axiological, phenomenological grounds for the formation and functioning of concrete scientific theoretical and legal and historical and legal constructions. To implement the task posed in the article, the key characteristics of both a theory of a philosophical type and ideals, norms and characteristics of scientific knowledge are examined in detail. The revealed difference is extrapolated to the relationship between the theory of law as a product of scientific creativity and the philosophy of law as a construction that sets basic philosophical meanings. As an example of the foundations of the scientific theories of progress, state, morality and law developed by the philosophy of law and the state, the author gives the views and thinkers of the West European philosophical classics T. Hobbes, J.-J. Russo, I. Kant, G.V.F. Hegel. It was their philosophical concepts that predetermined the images of theoretical and historical-legal doctrines of the XVIII, XIX, XX and even the beginning of the XXI centuries. Thus, the attitude of the philosophy of law and the theory of law is built along the «vertical»: from the ontological foundation to the construction of theoretical and historical and historical legal scientific constructions.

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Characteristics of Different Types of Childhood Violence and the Risk of Revictimization

Violence Against Women ◽

10.1177/1077801218818381 ◽

2019 ◽

Vol 25 (14) ◽

pp. 1696-1716 ◽

Cited By ~ 4

Author(s):

Ida Frugaard Stroem ◽

Helene Flood Aakvaag ◽

Tore Wentzel-Larsen

Keyword(s):

Childhood Abuse ◽

Telephone Survey ◽

Regression Analyses ◽

Multiple Forms ◽

Different Types ◽

Children And Young Adults ◽

Childhood Violence ◽

Forms Of Violence ◽

The Relationship

This study investigates the relationship between the characteristics of different types of childhood violence and adult victimization using two waves of data from a community telephone survey (T1) and a follow-up survey, including 505 cases and 506 controls, aged 17-35 years (T2). The logistic regression analyses showed that exposure to childhood abuse, regardless of type, was associated with adult victimization. Exposure to multiple types of abuse, victimization both in childhood and in young adulthood, and recency of abuse increased these odds. Our findings emphasize the importance of assessing multiple forms of violence when studying revictimization. Practitioners working with children and young adults should be attentive to the number of victimization types experienced and recent victimization to prevent further abuse.

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Endolysosomal Cation Channels and MITF in Melanocytes and Melanoma

Biomolecules ◽

10.3390/biom11071021 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1021

Author(s):

Carla Abrahamian ◽

Christian Grimm

Keyword(s):

Breast Cancer ◽

Gene Expression ◽

Transcription Factor ◽

Convincing Evidence ◽

Signaling Cascades ◽

Cation Channels ◽

Pore Channel ◽

Different Types ◽

Canonical Wnt ◽

The Relationship

Microphthalmia-associated transcription factor (MITF) is the principal transcription factor regulating pivotal processes in melanoma cell development, growth, survival, proliferation, differentiation and invasion. In recent years, convincing evidence has been provided attesting key roles of endolysosomal cation channels, specifically TPCs and TRPMLs, in cancer, including breast cancer, glioblastoma, bladder cancer, hepatocellular carcinoma and melanoma. In this review, we provide a gene expression profile of these channels in different types of cancers and decipher their roles, in particular the roles of two-pore channel 2 (TPC2) and TRPML1 in melanocytes and melanoma. We specifically discuss the signaling cascades regulating MITF and the relationship between endolysosomal cation channels, MAPK, canonical Wnt/GSK3 pathways and MITF.

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The Effect of Different Types of Internal Curing Liquid on the Properties of Alkali-Activated Slag (AAS) Mortar

Sustainability ◽

10.3390/su13042407 ◽

2021 ◽

Vol 13 (4) ◽

pp. 2407

Author(s):

Guang-Zhu Zhang ◽

Xiao-Yong Wang ◽

Tae-Wan Kim ◽

Jong-Yeon Lim ◽

Yi Han

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Deionized Water ◽

Internal Curing ◽

Control Group ◽

Alkali Activated Slag ◽

Different Types ◽

Naoh Solution ◽

Activated Slag ◽

Alkali Activated

This study shows the effect of different types of internal curing liquid on the properties of alkali-activated slag (AAS) mortar. NaOH solution and deionized water were used as the liquid internal curing agents and zeolite sand was the internal curing agent that replaced the standard sand at 15% and 30%, respectively. Experiments on the mechanical properties, hydration kinetics, autogenous shrinkage (AS), internal temperature, internal relative humidity, surface electrical resistivity, ultrasonic pulse velocity (UPV), and setting time were performed. The conclusions are as follows: (1) the setting times of AAS mortars with internal curing by water were longer than those of internal curing by NaOH solution. (2) NaOH solution more effectively reduces the AS of AAS mortars than water when used as an internal curing liquid. (3) The cumulative heat of the AAS mortar when using water for internal curing is substantially reduced compared to the control group. (4) For the AAS mortars with NaOH solution as an internal curing liquid, compared with the control specimen, the compressive strength results are increased. However, a decrease in compressive strength values occurs when water is used as an internal curing liquid in the AAS mortar. (5) The UPV decreases as the content of zeolite sand that replaces the standard sand increases. (6) When internal curing is carried out with water as the internal curing liquid, the surface resistivity values of the AAS mortar are higher than when the alkali solution is used as the internal curing liquid. To sum up, both NaOH and deionized water are effective as internal curing liquids, but the NaOH solution shows a better performance in terms of reducing shrinkage and improving mechanical properties than deionized water.

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More than a method: trusting relationships, productive tensions, and two-way learning as mechanisms of authentic co-production

Research Involvement and Engagement ◽

10.1186/s40900-021-00262-5 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Sarah E. Knowles ◽

Dawn Allen ◽

Ailsa Donnelly ◽

Jackie Flynn ◽

Kay Gallacher ◽

...

Keyword(s):

Patient Involvement ◽

Ways Of Knowing ◽

Knowledge Mobilisation ◽

Academic Knowledge ◽

Willingness To Change ◽

Different Types ◽

Hybrid Knowledge ◽

Key Issues ◽

Field Notes ◽

The Relationship

Abstract Background Knowledge mobilisation requires the effective elicitation and blending of different types of knowledge or ways of knowing, to produce hybrid knowledge outputs that are valuable to both knowledge producers (researchers) and knowledge users (health care stakeholders). Patients and service users are a neglected user group, and there is a need for transparent reporting and critical review of methods used to co-produce knowledge with patients. This study aimed to explore the potential of participatory codesign methods as a mechanism of supporting knowledge sharing, and to evaluate this from the perspective of both researchers and patients. Methods A knowledge mobilisation research project using participatory codesign workshops to explore patient involvement in using health data to improve services. To evaluate involvement in the project, multiple qualitative data sources were collected throughout, including a survey informed by the Generic Learning Outcomes framework, an evaluation focus group, and field notes. Analysis was a collective dialogic reflection on project processes and impacts, including comparing and contrasting the key issues from the researcher and contributor perspectives. Results Authentic involvement was seen as the result of “space to talk” and “space to change”. "Space to talk" refers to creating space for shared dialogue, including space for tension and disagreement, and recognising contributor and researcher expertise as equally valuable to the discussion. ‘Space to change’ refers to space to adapt in response to contributor feedback. These were partly facilitated by the use of codesign methods which emphasise visual and iterative working, but contributors emphasised that relational openness was more crucial, and that this needed to apply to the study overall (specifically, how contributors were reimbursed as a demonstration of how their input was valued) to build trust, not just to processes within the workshops. Conclusions Specific methods used within involvement are only one component of effective involvement practice. The relationship between researcher and contributors, and particularly researcher willingness to change their approach in response to feedback, were considered most important by contributors. Productive tension was emphasised as a key mechanism in leading to genuinely hybrid outputs that combined contributor insight and experience with academic knowledge and understanding.

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