Fly Ash the Status of Resource-Oriented Utilization in Construction Material

2013 ◽  
Vol 753-755 ◽  
pp. 628-631
Author(s):  
Zhi Xin Yue ◽  
Juan Nong Chen
Keyword(s):  
Fly Ash ◽  
Resource Utilization ◽  
Power Plants ◽  
Construction Material ◽  
Construction Materials ◽  
Status Quo ◽  
Solid Wastes ◽  
New Approaches ◽  
The Status ◽  
The Government

Fly ash is a large amount of solid wastes produced from power plants, use of its resources has always been a matter of the government and experts are concerned. Combining with the characteristics of the nature of the fly ash, introduces the fly ash resource utilization in construction materials using some new approaches and application of the status quo.

The removal of As(V) ions by lime-modified fly ash and reuse of the exhausted adsorbent as an additive for construction material

2020 ◽  
Author(s):  
Milica Karanac ◽  
Maja Đolić ◽  
Vladimir Pavićević ◽  
Aleksandar Marinković
Keyword(s):  
Fly Ash ◽  
Power Plants ◽  
Low Cost ◽  
Construction Material ◽  
Thermal Power ◽  
Construction Materials ◽  
Practical Applications ◽  
The Impact ◽  
By Products ◽  
Modified Fly Ash

<p>Coal thermal power plants (TPP) actively generate numerous solid combustion by-products, including fly ash and bottom ash. These TPP by-products have already found use in a variety of civil engineering applications, such as a substitute for sand and gravel in structures, as well as a binding component in certain types of cement (generally, concrete and masonry). Furthermore, such by-products have become a subject of increasing interest in environmental engineering as a low-cost and effective adsorbent for the removal of organic pollutants and heavy metals from wastewaters.</p><p>In order to minimize the impact of material cost, novel solutions for the development of a high capacity and long-term adsorbent have provided a high performance adsorbent for practical applications. This study is focused on the use of modified fly ash (MFA) activated by lime (Ca(OH)<sub>2</sub>) as an effective and low-cost adsorbent for the removal of As(V) ions. The adsorption capacity of the MFA adsorbent was found to be 35.40 mg g<sup>-1</sup>, while the kinetic and thermodynamic parameters indicated a spontaneous and endothermic process. Due to the low desorption potential of the exhausted adsorbent (MFA/As(V), their effective further material reuse was established to be feasible. The reuse of the exhausted adsorbent was obtained through pozzolanic MFA particles and Ca(OH)<sub>2, </sub>thereby formulating a construction material of a cementitious calcium-silicate hydrate. The toxicity leaching test (TCLP) and mechanical properties of the new construction material containing exhausted MFA (CM-MFA/As(V)) confirm its safe use in the laboratory as well as its semi-industrial application.</p><p>The specific objectives of this study have been: (i) to improve the adsorption performance of the MFA; (ii) to evaluate the material’s equilibrium, as well as the process’ kinetic and thermodynamic aspects, including  estimating its limiting step; and (iii) to investigate the possible reuse of the exhausted adsorbent in the production of construction materials. The kinetic data were successfully fitted by a pseudo-second-order equation and the Weber-Morris model. The metal-desorption experiments performed on the exhausted FA and MFA indicate a low recovery of the selected pollutants.</p><p>The major outcome of this study, indicates that double-valorization of fly ash opens new directions for waste management toward reuse in effective practical applications; i.e., for actual water –purification systems, as well as in the production of construction material.</p>

1848 and Parliamentary Reform

1988 ◽  
Vol 31 (4) ◽  
pp. 831-851 ◽  
Author(s):  
Roland Quinault
Keyword(s):  
Solid Support ◽  
Status Quo ◽  
Middle Classes ◽  
State Security ◽  
Property Owners ◽  
Parliamentary Reform ◽  
The Status ◽  
History Of ◽  
The Government ◽  
History Books

1848 has gone down in history – or rather in history books – as the year when England was different. In that year a wave of revolution on the Continent overthrew constitutions, premiers and even a dynasty but in England, by contrast, the middle classes rallied round the government and helped it preserve the status quo. This interpretation of 1848 has long been the established orthodoxy amongst historians. Asa Briggs took this view thirty years ago and it has lately been endorsed by F. B. Smith and Henry Weisser. Most recently, John Saville, in his book on 1848, has concluded that events in England ‘demonstrated beyond question and doubt, the complete and solid support of the middling strata to the defence of existing institutions’. He claims that ‘the outstanding feature of 1848 was the mass response to the call for special constables to assist the professional forces of state security’ which reflected a closing of ranks among all property owners. Although some historians, notably David Goodway, have recently stressed the vitality of Chartism in 1848 they have not challenged the traditional view that the movement failed to win concessions from the establishment and soon declined. Thus 1848 in England is generally regarded as a terminal date: the last chapter in the history of Chartism as a major movement. Thereafter Britain experienced a period of conservatism – described by one historian as ‘the mid-Victorian calm’–which lasted until the death of Palmerston in 1865.

scholarly journals Exploration of the Way out for Education Reform Based on the Status Quo of Chinese and Foreign Education Systems

2018 ◽  
Vol 2 (2) ◽  
pp. 37
Author(s):  
Yifan Wang
Keyword(s):  
Education Reform ◽  
Education System ◽  
Status Quo ◽  
New Era ◽  
The Status ◽  
Practical Reality ◽  
The Government ◽  
Foreign Education ◽  
Education In China ◽  
The Way

 Against the backdrop of growing national strength and rapid economic development, the government has placed more emphasis on education. In recent years, remarkable achievements have been registered in terms of education in China, which lays a solid foundation for cultivating comprehensive professionally-trained personnel in the new era. However, the current education system is ridden with many setbacks and problems. This paper conducts an analysis of the specific conditions of education both at home and abroad, status quo of education in China, makes some reflections on the direction and measures of China's education reform based on the practical reality of education in China. Measures should be taken to inject personalities into the traditional, exam-oriented education system, which keeps pace with the new era. As is known to all, it's important to strike a balance between public education and non-government funded education in a scientific and reasonable manner. The overhauling of traditional education policies will pave the way for China's educational renaissance and realize the great blueprint of the Chinese dream. 

Literature Review of the Domestic Research on Emission Trade

2012 ◽  
Vol 424-425 ◽  
pp. 179-183
Author(s):  
Li Ping Zhou
Keyword(s):  
Literature Review ◽  
Emission Trading ◽  
Field Research ◽  
Status Quo ◽  
Research Field ◽  
Theoretical Research ◽  
Research Orientation ◽  
Trading Market ◽  
The Status ◽  
The Government

Emission trading means that, on the premise that environment and resources belongs to the nation and the total amount of emission is under regulation, the government sells the permit of a certain amount of emission to the polluter by issuing tradable emission licences. This paper discusses the emission trading in China in the recent 30 years. By reviewing the research field,research orientation and the status quo, this paper aimed at do some fundamental theoretical research on the application of the emission trading theory and the establishment of the emission trading market in China

The United Arab Emirates will monitor internet closely

2016 ◽  
Keyword(s):  
Social Media ◽  
United Arab Emirates ◽  
Status Quo ◽  
Content Type ◽  
Global Brands ◽  
Low Profile ◽  
The Status ◽  
Social Media Platforms ◽  
The Government ◽  
In Transit

Subject Importance of social media in the United Arab Emirates. Significance The United Arab Emirates (UAE) is among the most connected countries in the Middle East, with one of the highest rates of social media penetration. Compared with Western countries, UAE consumers are more likely to engage with brands and to be less worried about issues of privacy and tracking. The government engages in extensive monitoring, surveillance and censorship of social media and apps. Impacts Both global brands and local businesses have additional scope to develop social media strategies to capitalise on rising usage. Content with the status quo and tight monitoring will prevent activists from leveraging social media platforms to bring about change. Extraterritorial aspects of the cybercrime law could be applied to non-residents and travellers in transit. Non-renewal of visas could become a more common, low-profile way to exclude expatriates who transgress on social media.

scholarly journals Increased fly ash utilization — value addition through forest road reconstruction

2017 ◽  
Vol 44 (3) ◽  
pp. 223-231 ◽  
Author(s):  
Tomi Kaakkurivaara ◽  
Heikki Korpunen
Keyword(s):  
Fly Ash ◽  
Construction Material ◽  
Construction Materials ◽  
Cost Calculation ◽  
Value Addition ◽  
Construction Costs ◽  
Forest Road ◽  
Uniform Layer ◽  
Cost Calculations ◽  
Fly Ash Utilization

Increasing forest bioenergy utilization is increasing the need to discover more applications for fly ash to avoid dumping charges. Our study concentrates on defining the work phases of reconstruction work and estimation of construction costs for a method using biomass based fly ash. Cost calculations were carried out for two mixed structures of fly ash and aggregate, two uniform structures of fly ash, and a conventional aggregate structure, where construction material volumes were calculated per kilometre for each structure. Our study defined suitable machines and their productivity per hour for different work phases. Cost calculation equations were formed for the used machines and the transportation of construction materials. Our study showed that building a 250 mm thick uniform layer of fly ash was the best alternative for minimizing construction costs. However, building a 500 mm thick uniform layer of fly ash was the best alternative for minimizing dumping charges.

scholarly journals Mud-Based Construction Material: Promising Properties of French Gravel Wash Mud Mixed with Byproducts, Seashells and Fly Ash as a Binder

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6216
Author(s):  
Yassine El Mendili ◽  
Manal Bouasria ◽  
Mohammed-Hichem Benzaama ◽  
Fouzia Khadraoui ◽  
Malo Le Guern ◽  
...  
Keyword(s):  
Fly Ash ◽  
Construction Material ◽  
Construction Materials ◽  
Pozzolanic Reaction ◽  
Good Opportunity ◽  
The Sustainable Development ◽  
Crepidula Fornicata ◽  
Earth Construction ◽  
Characterization Study ◽  
Development Goals

The French gravel industry produces approximatively 6.5 million tons of gravel wash mud each year. This material offers very promising properties which require an in-depth characterization study before its use as a construction material, otherwise it is removed from value cycles by disposal in landfills. We examined the suitability of gravel wash mud and seashells, with fly ash as a binder, as an unfired earth construction material. Thermal and mechanical characterizations of the smart mixture composed of gravel wash mud, Crepidula fornicata shells and fly ash are performed. The new specimens exhibit high compressive strengths compared to usual earth construction materials, which appears as a good opportunity for a reduction in the thickness of walls. The use of fly ash and Crepidula shells in addition to gravel wash mud provides high silica and calcium contents, which both react with clay, leading to the formation of tobermorite and Al-tobermorite as a result of a pozzolanic reaction. Considering the reduction in porosity and improvements in strength, these new materials are good candidates to contribute significantly to the Sustainable Development Goals (SDGs) and reduce carbon emissions.

scholarly journals INITIATING LAW REFORM IN INDONESIA (FROM THE DIGNIFIED JUSTICE PERSPECTIVE)

2020 ◽  
Vol 3 (1) ◽  
pp. 14-25
Author(s):  
Christina Maya Indah S ◽  
Teguh Prasetyo
Keyword(s):  
Legal System ◽  
Civil Law ◽  
Status Quo ◽  
Point Of View ◽  
Law Reform ◽  
Social Changes ◽  
Sociological Jurisprudence ◽  
Legislative Branch ◽  
The Status ◽  
The Government

It is argued in this article that a study on the law reform of a country is the study which related to understanding of a scientific paradigm which made up of the basic idea of a country’s legal system. The main argument in this article is that the basic idea ofma legalmrefom on a legal system must be build upon the enforcement of the juridical principles found and developed in the system. This is derived from a postulate of the Dignified Justice teory perspective.In this view legal virtues underpinning a legal system are examined together as one system of principles and rules or a legal system. Philosophically, or it is a theoretical and a paradigm that law is believed as inseparable from the legal science itself. This philosophy has been developed to make a correction to the sociological jurisprudence perspective, which mainly argued that each occurence of social changes in a legal system cannot be answered by regulation alone. The sociological jurisprudence point of view argues that law is confined to the status quo of a society. Many has argued that this sociological indicative has occurred in many civil law systems, in particular Indonesia, to be used as its best prototype. In the Indonesian legal system, law is positioned as rules and regulations made by the legislative branch of the government. In this perspective laws has been excluded from humanity almost altogether. This article argues that Pancasila as the Indonesia Legal System is the way to solve this problem. Since Pancasila is used as the basis of the State and the source of all legal sources. For this reason, it is interesting to examine how the Pancasila actually became a basis of values in initiating the project of law reform in Indonesia.

A study on industrial-scale waste utilization in construction material production: the use of fly ash in GRP composite pipe

2020 ◽  
Vol 70 (340) ◽  
pp. 234
Author(s):  
A. Beycioğlu ◽  
H. Mis ◽  
E. D. Güner ◽  
H. Güner ◽  
N. Gökçe
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Construction Material ◽  
Construction Materials ◽  
Waste Utilization ◽  
Industrial Wastes ◽  
Glass Fiber Reinforced ◽  
Axial Tensile ◽  
Long Term Performance ◽  
Term Performance

This study presents a new approach to the utilization of industrial by-products in construction materials by using fly ash (FA) in the production of glass fiber-reinforced polyester (GRP) pipe. The FA was substituted by 10% and 20% (by weight of sand) in the mixtures to produce GRP pipes of 350 mm in diameter and 6 m in length for testing. Stiffness modulus (SM), axial tensile strength (ATS), and hoop tensile strength (HTS) tests were conducted on the produced GRP pipes and their elasticity modulus (EM) values were also calculated. To observe the microstructure of the GRP pipes and the interfacial transition zone of the layers, SEM and microscopic analyses were performed. Furthermore, a strain-corrosion test was conducted to obtain information about long term-performance of samples. The results showed that the FA-filled GRP pipes were found to meet the requirements of the related standards, and that the use of FA in the GRP pipe industry may be an important alternative approach to the utilization of industrial wastes via effective recycling mechanisms.

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