scholarly journals Recycling of Waste Plastic into Fine-Grained Concrete Without Strength Reduction

2021 ◽  
Vol 915 (1) ◽  
pp. 012002
Author(s):  
M Chekanovich ◽  
S Romanenko ◽  
Ya Andriievska
Keyword(s):  
Negative Impact ◽  
Concrete Strength ◽  
Environmental Safety ◽  
Plastic Waste ◽  
Point Of View ◽  
Partial Replacement ◽  
Fine Grained ◽  
Concrete Production ◽  
Research Findings ◽  
The Impact

Abstract The problem of recycling plastic waste is quite acute both in Ukraine and for most countries of the world. The use of plastic processing products can be considered an urgent problem of society from the point of view of environmental protection and environmental safety. Today, developments are underway in the field of using polymers in one of the largest sectors of production – the construction industry. In recent years, the scientific community has been actively studying the issue of using plastic waste in the manufacture of reinforced concrete structures, that is, partial replacement of the filler with plastic particles. At the same time, in the short term, sufficient resources of plastic waste will be provided, which will come in value for collection and recycling. The use of plastic in concrete production technology will not only reduce the negative impact of waste on the environment, but also develop concrete of more sustainable quality and lower cost. The aim of the study is determining the amount of plastic waste that can be utilized through introducing it into concrete mix without reducing the strength of the concrete. Here we have considered the issue of the impact of the degree of plastic grinding on concrete strength. The research findings show that the introduction of plastic in an amount up to 3.5% of the volume of concrete as a substitute for the aggregate does not reduce its compressive or flexural strength.

scholarly journals An Overview of the Impact of Special Anti-Robbery Squad (SARS) In Nigeria

2018 ◽  
Vol 8 (4) ◽  
pp. 180
Author(s):  
Ogbette, Afamefuna Samuel ◽  
Idam, Macben Otu ◽  
Kareem, Akeem Olumide
Keyword(s):  
Negative Impact ◽  
Point Of View ◽  
Police Force ◽  
Control Measures ◽  
Secondary Source ◽  
Human Relations ◽  
Police Service ◽  
Service Commission ◽  
Hard Drugs ◽  
The Impact

This study examined the impact of Special Anti-Robbery Squad (SARS) in Nigeria. It solely depended on the secondary source for information. SARS is one of the Nigeria Police Force units that is saddled with the responsibility of fighting crime in the society; specifically, robbery and kidnapping. The impact was examined in two ways: Positive and Negative impact. From the positive point of view, SARS has been able to reduce robbery and kidnapping to an extent but unfortunately, people now use them as bodyguards to intimidate, suppress, and harass other people. From our findings, SARS tortures people mercilessly, extort, beat, kill and jail people who are not forthcoming with their demands. It was also discovered that, most of them lacks orientation on human relation which is a big gap the Nigeria Police Force need to cover by re-orienting them. Again, it was discovered that some of the personnel smoke and drink. They are often intoxicated while on duty, wielding sophisticated guns. From the study, the following recommendations were made: control measures should be put in place for SARS to be stopped from torturing people. They should equally be stopped from extorting, beating, killing (except in a battle ground) and framing people up just to be jailed. Investigative jobs as that of SARS should be exclusively for graduates in the Police Service. Again, the Nigeria Police Force and Nigeria Police Service Commission need to often re-orient these officers on human relations. Finally, officers caught drinking or smoking (especially hard drugs) on duty should be properly dealt with to serve as a deterrent to others.

scholarly journals Pengaruh Penambahan Limbah Plastik Jenis Thermosetting Terhadap Parameter Marshall Laston AC-WC

2019 ◽  
Vol 24 (2) ◽  
pp. 166
Author(s):  
Kusdiyono Kusdiyono ◽  
Supriyadi Supriyadi ◽  
Tedjo Mulyono ◽  
Sukoyo Sukoyo
Keyword(s):  
Asphalt Concrete ◽  
Plastic Waste ◽  
Concrete Mixture ◽  
Partial Replacement ◽  
Short Term ◽  
Road Pavement ◽  
Long Run ◽  
Plastic Bag ◽  
Marshall Stability ◽  
The Impact

At present, plastic is a material that is needed by the community at large, where the impact is also very extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry has implemented a paid plastic bag program in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden for the community to buy it. Based on the above problems, it is necessary to utilize this plastic waste to be made into road pavement materials such as in the manufacture of Asphal Concrette Wearing Course, by making 5 mixed variations ranging from (2 to 10)% of the weight of the aggregate . This research was initiated through a survey process, material procurement, testing of stacking materials, making test specimens, testing specimens. The results of the research can show that the type of Thermosetting plastic waste has a significant influence on the Asphalt Concrete mixture AC-WC heat mixture, including: Density, Marshall Stability, Flow, VIM, VMA, MQ and the remaining Marshall Stability tend to show an increase, moderate VFA and VIMrefusal Density values tend to show a decrease. Thus the plastic waste from the Thermosetting type can be used as a partial replacement of the aggregate for the Asphalt Concrete mixture AC-WC heat mixture with a plastic waste content is limited to a maximum of 10% and at an optimum asphalt content of 5.55%. Thus this research is expected to be of benefit to the industry and the people of Semarang in relation to the use of plastic waste for road pavement.

scholarly journals The Impact of Texting on Standard English: The Students’ Perspective

2019 ◽  
Author(s):  
Jamal Kaid Mohammed Ali ◽  
S. Imtiaz Hasnain ◽  
M. Salim Beg
Keyword(s):  
English Language ◽  
Negative Impact ◽  
Negative Attitude ◽  
Point Of View ◽  
Standard English ◽  
Perceptions And Attitudes ◽  
English Second Language ◽  
Esl Learners ◽  
The Impact ◽  
Academic Year

Overindulgence in social networking, in general, and texting, in particular, is much in practice. It is cutting across various population boundaries and has almost assumed an endemic proportion. Its consequential impact on the standard language has acquired greater importance. This paper aims to determine the perceptions and attitudes of English Second Language (ESL) learners at Aligarh Muslim University towards the consequences of texting on Standard English. The data were collected through a five-point scale questionnaire from ninety students who were enrolled at Aligarh Muslim University during the academic year 2010-2011. The respondents completed a 16-item questionnaire. The students from which the data were collected were grouped according to their levels. The results indicate the negative impact of this new usage of the language in breaking the rules of English language and influencing their literacy. Moreover, the questionnaire results from respondents' point of view show that regardless of their heavy use of texting, most respondents have a negative attitude towards texting and they viewed it as a threat to Standard English.

scholarly journals STRENGTH AND DURABILITY TEST (SULPHATE ATTACK) ON LIGHT WEIGHT CONCRETE BY PARTIAL REPLACEMENT OF VERMICULITE FOR FINE AGGREGATE AND SILICAFUME FOR CEMENT

2021 ◽  
Vol 5 (12) ◽  
Author(s):  
M. Preethi ◽  
Md. Hamraj ◽  
Ashveen Kumar
Keyword(s):  
Sulphuric Acid ◽  
Concrete Strength ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Sulphate Attack ◽  
Durability Test ◽  
Measuring Machine ◽  
Strength And Durability ◽  
The Impact ◽  
Current Report

The present study focuses on the preparation of M30 grade concrete by replacing fine aggregate with 0%,5%,10%,15%,20%,25% of vermiculite and cement with 0% and 10% of constant silica fume to improve the performance of concrete. Via experimentation, the impact of acid exposure on concrete strength and weight is investigated in the current report. Concrete cubes of different mixes(12no.’s) are casted and exposed to Sulphuric acid of (pH=3). Cubes with dimensions of 100mm x 100mm x 100mm are cast with M30 concrete and then immersed (cured) in water for 28 days. The cubes are then soaked in 4 percent concentrated Sulphuric acid for 7 days. The compressive strength of the cured cubes is then measured using a compressive measuring machine.

Forecasting the fiber penetration based on copper access regulation

Info ◽  
2014 ◽  
Vol 16 (1) ◽  
pp. 17-31
Author(s):  
François Jeanjean
Keyword(s):  
Negative Impact ◽  
Logistic Function ◽  
Point Of View ◽  
Cable Modem ◽  
Broadband Access ◽  
Content Type ◽  
Access Regulation ◽  
Access Charges ◽  
The Impact ◽  
Practical Implications

Purpose – This paper aims to investigate the impact of copper access regulation on broadband household adoption for each technology (xDSL on copper infrastructure, FTTx on fiber infrastructure and cable modem). It provides a forecast of the penetration rate of broadband access for each technology (copper xDSL, fiber, FTTx and cable modem) through 2020. Design/methodology/approach – This paper uses an empirical approach using a dataset covering 15 European countries. The dynamic of the adoption path is modeled by a logistic function. Copper access regulation is measured by two variables: copper access charge and copper wholesale access share, i.e. the ratio of copper wholesale access provided by the incumbent to alternative operators out of the total number of copper accesses. Findings – This paper shows that tough copper access regulation has a negative impact on fiber and cable modem adoption. Low copper prices decrease consumer adoption of other technologies. This reduces their profitability and thus the incentives to invest in alternative platforms. Practical implications – This paper highlights that an increase in copper access charges or a decrease in copper wholesale access shares could help to achieve the objectives of the Digital Agenda for Europe. Originality/value – This paper provides an empirical evidence of the impact of the copper access regulation on the fiber and ultra-fast broadband adoption from a dynamic point of view.

scholarly journals Regional Aspects of Demand and Supply Shocks: Economy of the Khabarovsk Territory During a Pandemic

2021 ◽  
Vol 17 (2) ◽  
pp. 165-181
Author(s):  
Artyom Isaev ◽  
Keyword(s):  
Negative Impact ◽  
Supply And Demand ◽  
Initial Period ◽  
Aggregate Demand ◽  
Point Of View ◽  
Retail Trade ◽  
Natural Rate ◽  
Regional Labor Market ◽  
Aggregate Supply ◽  
The Impact

The article provides an overview of the short-term dynamics of macroeconomic indicators for the Khabarovsk Territory during the COVID-19 pandemic after the introduction of temporary restrictive measures in April and May 2020. The impact of these measures extended both to the elements of regional aggregate demand and aggregate supply. From the point of view of the theory of short-run economic fluctuations, aggregate supply and demand shocks, such as those that occurred in the initial period of the pandemic, lead to a reduction in aggregate output followed by an increase in actual and natural rate of unemployment. Expectations have an additional negative impact since the growth of uncertainty gives rise to an increase in savings and an additional reduction in consumer activity. In the case of Khabarovsk Territory it is shown that the most affected industries of the economy were retail trade and services. Both industries experienced a negative shock in April, but while the former began recovery as early as May, the latter returned to the growth trajectory only in June. Residents changed their income usage patterns due to the restrictions on the consumer market, as well as to increased uncertainty about their future income. The share of net savings and cash balances increased with a corresponding decrease in the share of spending on goods and services. A negative supply shock contributed to a sharp rise in unemployment up to 24.5 thousand unemployed in the third quarter of 2020. Starting from the fourth quarter unemployment began to decline rapidly, but it had not reached pre-pandemic level of less than 7 thousand unemployed by the second quarter of 2021. It is shown that the permanent population outmigration, which increased in 2020, is a specific feature of the regional labor market. It has slowed down the return of the regional aggregate supply to its pre-pandemic positions after the restrictions were cancelled

scholarly journals The Risk of Long-Term Financing of Public Investments

2019 ◽  
Vol 2 (2) ◽  
pp. 42
Author(s):  
Krzysztof Jarosiński ◽  
Benedykt Opałka
Keyword(s):  
Public Debt ◽  
Negative Impact ◽  
Capital Expenditure ◽  
Public Investment ◽  
Point Of View ◽  
Risk Category ◽  
Investment Projects ◽  
The Public ◽  
Public Investments ◽  
The Impact

The risk of financing of public investments is a phenomenon that accompanies development processes in a permanent manner. Investments in the public sector are generally characterized by relatively long implementation cycles and involve significant capital expenditure and the necessity of often parallel running a large number of investment projects. In the processes of this type of investment a specific risk category of financing of this type of investment is quite often taken into account, given that such projects are financed mainly from budgetary resources: the state budget and self-government budgets. Economic practice indicates an importance of the proper selection of the method of the financing of new investments and taking into account new funds from various sources. This situation is often the result of a shortage of budgetary resources from which public investments could be financed. There may be difficulties in financing investments resulting from the emergence of a risk of budgetary deficit and the public debt. This risk may have a negative impact on investment decisions and may adversely affect the future course of ongoing investment projects. The purpose of the paper is to undertake studies on the conditions of financing investments from the point of view of the possibility of budget deficit and public debt and the impact of changes in the financial situation on the overall level of risk of public investment. The text is an invitation to undertake a broader discussion on financing public investments in conditions of limited public financial resources.

scholarly journals SOSIALISASI DAMPAK PENCEMARAN PLASTIK TERHADAP BIOTA LAUT KEPADA MASYARAKAT DI PANTAI LHOK BUBON ACEH BARAT

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Hayatun Nufus ◽  
Zuriat Zuriat
Keyword(s):  
Community Service ◽  
Negative Impact ◽  
Daily Life ◽  
Modern Society ◽  
Plastic Waste ◽  
Service Activities ◽  
The Impact

At present, the use of plastic is a general consumption in modern society, most of the consumption of plastic is only used once. As a result, a pile of plastic waste will pollute the environment and eventually the plastic waste will end up at sea. The high percentage of plastic waste contamination in the sea as one of the contaminants that can have a negative impact, not only on the environment, but can have an impact on biota that exist in that environment. The method of carrying out community service activities includes the socialization of the impact of plastic waste pollution on biota as well as techniques to minimize excessive use of plastic waste in daily life. The results achieved in the implementation of community service activities are an increase in knowledge and care for the environment.

scholarly journals Formation of ecological component of consumer properties of roads

2021 ◽  
Vol 2 (92) ◽  
pp. 92
Author(s):  
Natalia Arinushkina ◽  
Tamara Grishchenko
Keyword(s):  
Complex Analysis ◽  
Negative Impact ◽  
Noise Pollution ◽  
Environmental Safety ◽  
Information Support ◽  
Rolling Stock ◽  
Entire Area ◽  
The Road ◽  
Humus Layer ◽  
The Impact

Abstract. Problem. The issue of the impact of construction projects on the environment is extremely relevant and complex. Analysis of publications. The study of the negative impact of rolling stock, dust, noise, vibration, emissions during the operation of engines, as well as the impact of construction processes on the environment were engaged in such scientists as I.Ye. Evgeniev, RA Kizima, D.W. Зерка-лов, М.В. Немчинов, О.Л. Boychenko and others [1, 3, 4, 8, 9]. The aim is to assess the degree of impact of the road and transport on the environment. Presenting main material. Consumer properties of roads are a set of indicators that directly meet the needs of road users: safety, speed, continuity, comfort of traffic; road capacity, in particular the ability to pass cars and road trains with permitted axle loads, total weight and dimensions; ecological and aesthetic condition of the road; level of service and information support [2]. Ecological safety of the highway depends on the technical level, operational condition of the road and road structures, intensity and composition of traffic and characterizes the impact of the road on the environment within the limits of environmental standards, including harmful vehicle emissions, noise pollution, migration of animals, reptiles etc. [6]. Cars with gasoline engines are especially harmful in this regard. Diesel engines have a much lower level of toxicity and contain much less harmful substances. On the entire area of land occupied by the road and the construction of the road complex, on temporarily allotted land for reserves, quarries and other developments should be removed fertile layer of soil with bulldozers that cut and move the soil some distance. In the course of performance of this work the soil is exposed to mechanical disturbance. The construction area becomes a category of disturbed lands, which include lands with a removed or covered humus layer, not suitable for agricultural and forestry use without prior restoration of fertility [3, 7, 10, 11]. Conclusions. In order to protect the environment, many countries around the world are introducing laws designed to limit the negative impact of vehicles on the state of the biosphere, which requires the creation of modern environmental legislation and regulatory framework for environmental safety.

scholarly journals Utilization of Quarry Dust as a Partial Replacement of Sand in Concrete Making

2021 ◽  
Vol 5 (2) ◽  
pp. 582-591
Author(s):  
C.H. Aginam ◽  
C.M. Nwakaire ◽  
P.D. Onodagu ◽  
N.M. Ezema
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Dust Content ◽  
Partial Replacement ◽  
River Sand ◽  
Concrete Mixtures ◽  
A Value ◽  
River Bed ◽  
Concrete Production ◽  
Quarry Dust

The use of crushed quarry dust as a partial replacement of river sand in concrete production was investigated in this study. This is expedient as quarry dust can be available at some locations with insufficient river sand for construction purposes. The use of quarry dust is also in concrete is also a measure necessary for improvement of concrete strength. River sand was replaced with quarry dust for different mix designs of concrete for 0% to 25% replacement levels with 5% intervals. The physical properties of river sand and quarry dust were tested and reported and the workability as well as compressive strengths of the concrete mixtures were also tested. It was observed that the slump values increased with increase in percentage replacement of sand with quarry dust. The compressive strength of cubes at 28 day curing for control mixture of 1:3:6 at 0% partial replacement of river sand with quarry dust was 12.6N/mm2 but compressive strengths of 21.5 N/mm2 and 26.0 N/mm2 were gotten for 1:2:4 concrete and 1:1.5:3 concrete respectively. As the quarry dust content increased to 25%, the 28day compressive strength increased to 13.58 N/mm2 and 21.57 N/mm2 for the 1:3:6 and 1:2:4 mixes respectively. Compressive strength values decreased to a value of 25.72N/mm2 for the 1:1.5:3 concrete mix. The maximum compressive strength values were reached at 20% quarry dust content at the age of 28 days for the three concrete grades investigated. The increase in compressive strength with inclusion of quarry dust was attributed to the higher specific gravity of quarry dust above river sand. The compressive strength of quarry dust concrete continued to increase with age for all the percentages of quarry dust contents. Quarry dust was recommended as a suitable partial replacement for river bed sand in concrete production.

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