scholarly journals Towards the sustainable use of granite powder waste for manufacturing of cementitious composites

2020 ◽  
Vol 322 ◽  
pp. 01005
Author(s):  
Adrian Chajec
Keyword(s):  
Sustainable Use ◽  
Cementitious Material ◽  
Cementitious Composites ◽  
Cement Composites ◽  
Research Gaps ◽  
Supplementary Cementitious Material ◽  
Current State ◽  
Granite Powder ◽  
The Impact ◽  
Harmful Effects

The article is devoted to the description of the current state of knowledge about the possibilities of sustainable use of granite powder waste for manufacturing of cementitious composites. Granite powder waste is waste material resulting from the treatment of granite stone. In dry form, it is harmful to the environment and causes its degradation. One way to reduce its harmful effects is to use it for the sustainable production of cement composites and to use it as supplementary cementitious material (SCM). The results of researches carried out so far related to the impact of granite powder waste on the properties of fresh and hardened cementitious mixes are described. These results were compared and research gaps related to these studies were indicated. In summary, conclusions have been pointed out that indicate that granite powder waste can potentially be used as supplementary cementitious material, but comprehensive, comprehensive research related to this additive should also be carried out.

scholarly journals Wet-Treated MSWI Fly Ash Used as Supplementary Cementitious Material

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Martin Keppert ◽  
Jamal Akhter Siddique ◽  
Zbyšek Pavlík ◽  
Robert Černý
Keyword(s):  
Fly Ash ◽  
Waste Incineration ◽  
Cementitious Material ◽  
Mswi Fly Ash ◽  
Supplementary Cementitious Material ◽  
Before And After ◽  
Heavy Metal Immobilization ◽  
Common Technique ◽  
Strength And Durability ◽  
The Impact

Municipal solid waste incineration (MSWI) is a common technique in treatment of domestic waste. This technique annually produces approximately 25 Mt solid residues (i.e., bottom and fly ash) worldwide which is also a major issue in current research. In this research we are concerned with reusing the fly ash (FA) as supplementary cementitious material (SCM) in concrete. Such application solves the problem with heavy metal immobilization as well. To remove the high content of undesired soluble salts, number of washing treatments has been applied. Chemical composition of FA has been examined before and after treatments. The impact of cement substitution by FA in concrete was evaluated by measurement of its compressive strength and durability.

scholarly journals A review of the current state of research on China’s international image management

2019 ◽  
Vol 4 (1) ◽  
pp. 68-81
Author(s):  
Falk Hartig
Keyword(s):  
Knowledge Production ◽  
Mixed Methods Research ◽  
Management Practices ◽  
Image Management ◽  
Research Gaps ◽  
Communicative Practices ◽  
Current State ◽  
International Image ◽  
State Of Research ◽  
The Impact

Image Management is a crucial aspect of China’s engagement with the world, and the related scholarship has already produced high-quality learned analyses. This article, however, identifies a certain stagnation in knowledge production. This stagnation, I argue, is first due to a tendency to focus research on a few recurring themes and second due to three contested areas and related research gaps. These contestations concern (1) the question how to describe and conceptualize image management practices, (2) the question what instruments belong to image management practices, and (3) most importantly the question of audiences and how to measure the impact of these practices. By mapping out these areas, this article provides avenues for further research and argues in favor of interdisciplinary mixed-methods research in this field. Taking those contested areas and the existing research gaps more seriously into consideration is imperative to understand China’s communicative practices which increasingly become a major component of China’s overall behavior on the global stage.

Impact From Fly Ash as Additive to Concrete on the Radiation Exposure in Dwellings

2017 ◽  
Vol 3 (3) ◽  
Author(s):  
Govert de With
Keyword(s):  
Fly Ash ◽  
Radiation Dose ◽  
Radiation Exposure ◽  
Bulk Material ◽  
Cementitious Material ◽  
External Radiation ◽  
Supplementary Cementitious Material ◽  
Concrete Mixtures ◽  
Total Radiation Dose ◽  
The Impact

Fly ash is widely used as a supplementary cementitious material in the production of cement and concrete, and improves durability and strength of the concrete. However, as for all materials of mineral origin, fly ash is a source for natural radioactivity; hence, its need for responsible use. The aim of this study is to investigate the radiation impact from fly ash as an additive to concrete compared against concrete without fly ash. For this purpose, eight concrete mixtures are experimentally tested, followed by a computation of the radiation dose when used as bulk material in building constructions. The results demonstrate an increase in the total radiation dose from around 0.8 mSv with no fly ash up to 0.92 mSv when fly ash is used. The increase mostly comes from external radiation, while the radon exhalation factor is reduced and sometimes even reduces the radon dose despite the higher radium content. The work has demonstrated that the impact from fly ash on the radiation exposure is limited when applied as a supplementary cementitious material. At the same time, fly ash provides real benefits to the quality and durability of the concrete. For this reason, exemption strategies for such applications should be developed.

Sustainable use of palm oil fuel ash as a supplementary cementitious material: A comprehensive review

2021 ◽  
pp. 102286
Author(s):  
Hussein M. Hamada ◽  
Blessen Skariah Thomas ◽  
Fadzil M. Yahaya ◽  
Khairunisa Muthusamy ◽  
Jian Yang ◽  
...  
Keyword(s):  
Palm Oil ◽  
Sustainable Use ◽  
Cementitious Material ◽  
Palm Oil Fuel Ash ◽  
Supplementary Cementitious Material ◽  
Comprehensive Review ◽  
Fuel Ash ◽  
Oil Fuel

scholarly journals Non-autoclaved aerated concrete made of modified binding composition containing supplementary cementitious materials

2014 ◽  
Vol 13 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Oksana Poznyak ◽  
Andryy Melnyk
Keyword(s):  
Compressive Strength ◽  
Cementitious Materials ◽  
Cementitious Material ◽  
Supplementary Cementitious Materials ◽  
Polypropylene Fibers ◽  
Supplementary Cementitious Material ◽  
Autoclaved Aerated Concrete ◽  
Aerated Concrete ◽  
The Impact ◽  
Salt Waste

In this paper the impact of carbonate-containing and sulfate components, zeolite, polypropylene fibers on the properties of modified binding composition and non-autoclaved aerated concrete based on them is investigated. The aerated concrete based on the modified binding composition containing a supplementary cementitious material, that of carbonate-containing salt waste, reinforced with polypropylene fibers is characterized by the compressive strength of 2.7 MPa with the density of 650 kg/m3. The thickness of partitions between pores is 0.16 – 0.21 mm, and the number of pores with the size 0.2-1.0 mm is 76.4%.

Potentiality of Industrial Waste as Supplementary Cementitious Material in Concrete Production

2020 ◽  
Vol 11 (5) ◽  
pp. 214
Author(s):  
Sajjad Ali Mangi ◽  
Zubair Ahmed Memon ◽  
Shabir Hussain Khahro ◽  
Rizwan Ali Memon ◽  
Arshad Hussain Memon
Keyword(s):  
Industrial Waste ◽  
Cementitious Material ◽  
Supplementary Cementitious Material ◽  
Concrete Production

The Development of Agritourism in the Podkarpackie Voivodeship in the Light of International and National Conditions

2017 ◽  
Vol 13 ◽  
pp. 244-261
Author(s):  
Mariola Tracz ◽  
Małgorzata Bajgier-Kowalska ◽  
Radosław Uliszak
Keyword(s):  
Development Strategy ◽  
Current State ◽  
Central Statistical ◽  
Central Statistical Office ◽  
Tourism Resources ◽  
The One ◽  
The Impact ◽  
District Offices ◽  
Socio Economic Factors

Podkarpackie Voivodeship is one of the regions of Poland in which the number of agritourism entities is very high. Therefore tourism plays a significant role in its development strategy. The aim of the paper is to identify the current state of agritourism and the changes that have occurred in the region in the years 2000–2016. Specific objectives are to determine the distribution of agritourism farms and their offer, together with a comprehensive analysis of the environmental and socio-economic factors, as well as the impact of the Slovak-Ukrainian border. The report was developed on the statistical materials from the Polish Central Statistical Office, Podkarpackie Agricultural Advisory Centre in Boguchwała and data collected from municipalities and district offices that is published on their websites, as well as through interviews with 100 owners of agritourism farms in the Podkarpackie Voivodeship. The research has shown, on the one hand, the decline in the number of farms in the region and, on the other hand, the increase in the diversity of the tourist offer of these entities. Distribution of agritourism farms is closely linked to the attractiveness of natural environment and quality of secondary tourism resources. Traditional agritourism has not yet fully used its countryside, as well as cross-border advantages of its location.

Artificial Intelligence and Inequality in the Middle East

2020 ◽  
pp. 624-649 ◽  
Author(s):  
Nagla Rizk
Keyword(s):  
Artificial Intelligence ◽  
Human Resources ◽  
Young Population ◽  
Mena Region ◽  
Poor Countries ◽  
Current State ◽  
Resource Poor ◽  
Youth Entrepreneurship ◽  
The Arab Spring ◽  
The Impact

This chapter looks at the challenges, opportunities, and tensions facing the equitable development of artificial intelligence (AI) in the MENA region in the aftermath of the Arab Spring. While diverse in their natural and human resource endowments, countries of the region share a commonality in the predominance of a youthful population amid complex political and economic contexts. Rampant unemployment—especially among a growing young population—together with informality, gender, and digital inequalities, will likely shape the impact of AI technologies, especially in the region’s labor-abundant resource-poor countries. The chapter then analyzes issues related to data, legislative environment, infrastructure, and human resources as key inputs to AI technologies which in their current state may exacerbate existing inequalities. Ultimately, the promise for AI technologies for inclusion and helping mitigate inequalities lies in harnessing grounds-up youth entrepreneurship and innovation initiatives driven by data and AI, with a few hopeful signs coming from national policies.

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