scholarly journals A Review on Recent Advancements in Roller Compacted Concrete

2020 ◽  
Vol 5 (12) ◽  
pp. 1-8
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
Water Requirement ◽  
Partial Replacement ◽  
Roller Compacted Concrete ◽  
Glass Fibres ◽  
The World ◽  
To Come ◽  
Tax Savings ◽  
Main Attraction

Roller Compacted Concrete (RCC) is a durable material highly used for Pavements and Dams construction. In this regard being a high qualified material for its many advantages like Faster paving, Labor savings, Tax savings etc., researchers have produced many significant studies and derived the best results by various approaches. Some research includes the study of roller compacted concrete by partial replacement of cementitious minerals such as GGBS, admixtures like Glass fibres, Synthetic Fibres etc. With the help of locally available materials many tests have been conducted and results were shared to the world for further scope of study. Roller compacted concrete (RCC) has many advantages and the main attraction is its low water requirement with high workability and high compaction. This automatically results the outstanding compression strength. Current research has been focused on the improvement of mechanical properties and durability of the roller Compacted concrete incorporating different minerals and materials. In this paper, the Review of the papers have been presented in order to come to an overall understanding of the current progress for the Roller Compacted Concrete which is mainly being used for Roads, pavements, Parking lots and Dams

Experimental Analysis of Mechanical Properties on Concrete with Nano Silica Additive

2019 ◽  
Vol 57 ◽  
pp. 93-104 ◽  
Author(s):  
Usha Sivasankaran ◽  
Seetha Raman ◽  
S. Nallusamy
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fly Ash ◽  
Compression Strength ◽  
Experimental Analysis ◽  
Strength Properties ◽  
Concrete Mixture ◽  
Partial Replacement ◽  
Cement Particle ◽  
Nano Silica

In the current scenario nanotechnology and nanomaterials are emerging as key role in engineering and medical industries. The objective of this research is to increase the usage of fly ash in concrete to enhance the strength properties of concrete mixed with nano silica and to reduce the emission control caused by CO2discharged from cement manufacturing industries. The strength properties of concrete mixture is enhanced with nano size particles filled the voids amoung micron size cement particle, and hence a denser concrete mixture was being attained. Fly ash is used for partial replacement of cement to enhance the environmental sustainability and to reduce the cost. This research work focussed on preparation of nano silica mixed concrete with replacement of fly ash in concrete mixture. Nano silica was added in addition to the above by 1% and 2% to improve the overall strength properties. Different experimental analysis were carried out to obtained the results such as compression strength, ultimate divide tensile strength and elastic modulus of the enriched concrete mixture. From the observed results it was found that, compression strength was increased by adding 1% nano silica and 25% of fly ash and also increased the ultimate tensile strength by 28%. Scanning Electrom Microscope (SEM) results reveal that, the incorporation of the nano silica in concrete increases the mechanical properties and porosity was successfully minimized with enhancement of pore size distribution.

The Book of Tribulations: The Syrian Muslim Apocalyptic Tradition'

2017 ◽  
Author(s):  
David Cook ◽  
Nu'aym b. Hammad al-Marwazi
Keyword(s):  
Civil Wars ◽  
The World ◽  
End Of The World ◽  
To Come

“The Book of Tribulations by Nu`aym b. Hammad al-Marwazi (d. 844) is the earliest Muslim apocalyptic work to come down to us. Its contents focus upon the cataclysmic events to happen before the end of the world, the wars against the Byzantines, and the Turks, and the Muslim civil wars. There is extensive material about the Mahdi (messianic figure), the Muslim Antichrist and the return of Jesus, as well as descriptions of Gog and Magog. Much of the material in Nu`aym today is utilized by Salafi-jihadi groups fighting in Syria and Iraq.

LINGUACULTURAL ASPECT OF TEMPORAL NOMINATIONS

2020 ◽  
Vol 2020 (30) ◽  
pp. 200-213
Author(s):  
Anna Shapoval
Keyword(s):  
Sixteenth Century ◽  
Ottoman Empire ◽  
Experimental Analysis ◽  
Information Resource ◽  
Basic System ◽  
Scientific Publications ◽  
Lunar Calendar ◽  
Temporal System ◽  
The World ◽  
To Come

Analysis of linguocultural aspect of temporal nominations is impossible without involving the problems of hrononymic lexics. Chrononyms is an important information resource of a certain linguaculture, some distinctive peculiarities of conceptual picture of the world. The aim of the experimental analysis is a complex examination of the linguacultural aspect of temporal nominations that function in Chinese and Turkish languages reflecting the concepts of the world. The research was based on the material of the novels “Imperial woman” by Pearl Buck and “Roxolana” by Pavlo Zagrebelniy. The analysis of recent scientific publications allowed us to come to the conclusion that the investigation of hrononymic lexics can involve different theoretical and practical principles. Being guided by the existing classifications of chrononyms (N. Podolskaya, M. Torchinsky, S. Remmer) the linguocultural features of the following types of temporal chrononymic lexical units were identified and studied in the research: georthonyms, dynastic chrononyms, tumultonyms, parsonyms and mensonyms. The results of the research demonstrate that not all lexical units of temporal denotation chosen from the above mentioned novels refer to the class of chrononyms. The group under investigation includes the following lexemes: nominations of the lunar calendar, nominations of the solar calendar, nominations of mixed calendar and temporal slots denoting day and night. The basic system of chronology in the linguiacultures under analysis is the dominance of the lunar calendar nominations (Chinese picture of the world — 51,0 %, Turkish — 40,4 %). In the analyzed works the nominations of the solar calendar are used less often in the Chinese picture of the world; the usage of this unit reaches 20 %, and this phenomenon is historically conditioned. Mixed calendar nominations (21 % of temporal units) are rather common, solar calendar nominations are refined by the monthly calendar; it can be explained by the fact that the Chinese mind is conservative towards the new temporal system. In the Turkish picture of the world 45 % of temporal vocabulary belongs to the solar calendar since in the sixteenth century only a lunar calendar operated in the Ottoman Empire. It should be mentioned that significant place in the temporal vocabulary of “Roxolana” is conditioned by the influence of the linguistic personality of the author, who was a Ukrainian.

Effect of Titanium Carbide Particles on Mechanical Properties of Aluminum Matrix Composites

2017 ◽  
Vol 5 (2) ◽  
pp. 20-30
Author(s):  
Zaman Khalil Ibrahim
Keyword(s):  
Mechanical Properties ◽  
Titanium Carbide ◽  
Compression Strength ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Metallurgy Technique ◽  
Carbide Particles ◽  
Properties Of Composites

In this research aluminum matrix composites (AMCs) was reinforced by titanium carbide (TiC) particles and was produced. Powder metallurgy technique (PM) has been used to fabricate AMCs reinforced with various amounts (0%, 4%, 8%, 12%, 16% and 20% volume fraction) of TiC particles to study the effect of different volume fractions on mechanical properties of the Al-TiC composites. Measurements of compression strength and hardness showed that mechanical properties of composites increased with an increase in volume fraction of TiC Particles. Al-20 % vol. TiC composites exhibited the best properties with hardness value (97HRB) and compression strength value (275Mpa).

scholarly journals Current Understanding of Novel Coronavirus: Molecular Pathogenesis, Diagnosis, and Treatment Approaches

Immuno ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 30-66
Author(s):  
Niraj Kumar Jha ◽  
Madhan Jeyaraman ◽  
Mahesh Rachamalla ◽  
Shreesh Ojha ◽  
Kamal Dua ◽  
...  
Keyword(s):  
Paradigm Shift ◽  
Functional Outcomes ◽  
Cellular Therapy ◽  
Treatment Modalities ◽  
Unknown Etiology ◽  
Huge Number ◽  
The World ◽  
To Come ◽  
Novel Coronavirus ◽  
Nano Medicine

An outbreak of “Pneumonia of Unknown Etiology” occurred in Wuhan, China, in late December 2019. Later, the agent factor was identified and coined as SARS-CoV-2, and the disease was named coronavirus disease 2019 (COVID-19). In a shorter period, this newly emergent infection brought the world to a standstill. On 11 March 2020, the WHO declared COVID-19 as a pandemic. Researchers across the globe have joined their hands to investigate SARS-CoV-2 in terms of pathogenicity, transmissibility, and deduce therapeutics to subjugate this infection. The researchers and scholars practicing different arts of medicine are on an extensive quest to come up with safer ways to curb the pathological implications of this viral infection. A huge number of clinical trials are underway from the branch of allopathy and naturopathy. Besides, a paradigm shift on cellular therapy and nano-medicine protocols has to be optimized for better clinical and functional outcomes of COVID-19-affected individuals. This article unveils a comprehensive review of the pathogenesis mode of spread, and various treatment modalities to combat COVID-19 disease.

scholarly journals A Sense of Presence: Mediating an American Apocalypse

Religions ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 59
Author(s):  
Rachel Wagner
Keyword(s):  
Religious Practice ◽  
Religious Institutions ◽  
The Past ◽  
Sense Of Presence ◽  
The World ◽  
The Future ◽  
To Come

Here I build upon Robert Orsi’s work by arguing that we can see presence—and the longing for it—at work beyond the obvious spaces of religious practice. Presence, I propose, is alive and well in mediated apocalypticism, in the intense imagination of the future that preoccupies those who consume its narratives in film, games, and role plays. Presence is a way of bringing worlds beyond into tangible form, of touching them and letting them touch you. It is, in this sense, that Michael Hoelzl and Graham Ward observe the “re-emergence” of religion with a “new visibility” that is much more than “simple re-emergence of something that has been in decline in the past but is now manifesting itself once more.” I propose that the “new awareness of religion” they posit includes the mediated worlds that enchant and empower us via deeply immersive fandoms. Whereas religious institutions today may be suspicious of presence, it lives on in the thick of media fandoms and their material manifestations, especially those forms that make ultimate promises about the world to come.

scholarly journals Recent Attempts in the Design of Efficient PVC Plasticizers with Reduced Migration

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 844
Author(s):  
Joanna Czogała ◽  
Ewa Pankalla ◽  
Roman Turczyn
Keyword(s):  
Mechanical Properties ◽  
Partial Replacement ◽  
Total Replacement ◽  
Current Trends ◽  
Poly Vinyl Chloride ◽  
Wide Range ◽  
Migration Resistance ◽  
Secondary Plasticizer ◽  
New Compounds ◽  
Ethylhexyl Phthalate

This paper reviews the current trends in replacing commonly used plasticizers in poly(vinyl chloride), PVC, formulations by new compounds with reduced migration, leading to the enhancement in mechanical properties and better plasticizing efficiency. Novel plasticizers have been divided into three groups depending on the replacement strategy, i.e., total replacement, partial replacement, and internal plasticizers. Chemical and physical properties of PVC formulations containing a wide range of plasticizers have been compared, allowing observance of the improvements in polymer performance in comparison to PVC plasticized with conventionally applied bis(2-ethylhexyl) phthalate, di-n-octyl phthalate, bis(2-ethylhexyl) terephthalate and di-n-octyl terephthalate. Among a variety of newly developed plasticizers, we have indicated those presenting excellent migration resistance and advantageous mechanical properties, as well as those derived from natural sources. A separate chapter has been dedicated to the description of a synergistic effect of a mixture of two plasticizers, primary and secondary, that benefits in migration suppression when secondary plasticizer is added to PVC blend.

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