Comparative Study on Mechanical Strength Properties of Concrete by Using Demolished Concrete Waste

2019 ◽  
Vol 1 (6) ◽  
pp. 235-239
Author(s):  
Sabarinathan K ◽  
Ashwathi R
Keyword(s):  
Comparative Study ◽  
Mechanical Strength ◽  
Coarse Aggregate ◽  
Environmental Awareness ◽  
Strength Properties ◽  
Raw Material ◽  
Construction Waste ◽  
The World ◽  
Day By Day

The growing environmental awareness and Construction waste, is increasing day by day which in turn makes the world in seeking for examining the characteristics of Construction waste and obtaining a solution by using its reliable segments such that it can be used as a raw material and Conservation the natural recourses like Coarse aggregate

scholarly journals Experimental Study on Strength of Concrete Partially Replacing Chiton shell as Fine Aggregate

2018 ◽  
Vol 7 (3.34) ◽  
pp. 406
Author(s):  
J Madhan Kumar ◽  
R Kalaiselvan ◽  
Raghul Raj
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Natural Resources ◽  
Coarse Aggregate ◽  
Marine Organism ◽  
Raw Material ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Split Tensile Strength ◽  
The World

The most widely used material in the world is concrete, consequently there is a large requirement for raw material of concrete such as Fine Aggregate, Coarse Aggregate and cement. the huge extraction of the aggregate for manufacturing of concrete as serious effect on the environment due to depletion of natural resources and pollution. This affects the eco system to great extent. Hence the project deals with finding replacement for the existing raw material used in concrete by replacing the fine aggregate from river which is largely used in construction by chiton shell. Sea shell is the corpus of the marine organism. The sea shell has been grinded to 4.75mm and then replaced in the concrete. M20 mix was used and cubic specimen were casted for 5 different percentage of partial replacement as 0%, 5%, 10 %, 20%, and 25 %. All the specimens are tested for 7 & 28 days compressive, flexural and split tensile strength. it has been noted that the highest strength is obtained for 25% replacement of chiton shell. it was also observed that  addition of sea shell power in concrete reduced workability hence superplasticizer were added to improve the consistency. 

scholarly journals Mechanical Strength Properties of Geo Polymer Concrete incorporating Quarry Rock Dust and Recycled Coarse Aggregate

2019 ◽  
Vol 8 (4) ◽  
pp. 8414-8419
Keyword(s):  
Fly Ash ◽  
Mechanical Strength ◽  
Coarse Aggregate ◽  
Strength Properties ◽  
Source Material ◽  
Waste Materials ◽  
Polymer Concrete ◽  
Fine Aggregate ◽  
Recycled Coarse Aggregate ◽  
Rock Dust

Utilization of waste materials in concrete are increasing day by day. Ingredient replacements in concrete using waste materials are one of such threads which bind nature and concrete in a greener way to provide a better environment for the future. Reduction in environmental pollution, effective usage of waste management, the economic factor and quality of concrete are the predominant aspects by which the replacement materials are chosen.[1] Geopolymer Concrete has emerged as one of the possible alternatives to OPC, since 100% of fly ash is used instead of Portland Cement.. In this present study, the prime material which is used as the source material is fly-ash (ASTMC618) which completely replaces cement..Also fine aggregate has become very expensive and scarcity, quarry rock dust have been replaced for fine aggregate. Almost all the demolition and construction waste have been dumped without any usage which ultimately results in pollution.[2] This prime factor is considered to reutilize recycled coarse aggregate instead of coarse aggregate . A greener aided with natural friendly claim can be made only with the usage of the waste materials. To find the better combination mix, the GPC is categorized into four types as GPC-1, GPC-2, GPC-3 and GPC-4. In all the above combination of mixes fly ash is used as prime source material whereas QRD and RCA are replaced with different combinations. Thus this paper, particularly focuses on the effect of replacement of waste materials in combination of different mixes such as FA+CA, QRD+CA, FA+RCA, and QRD+RCA in GPC. The casted specimens are cured at ambient temperature and after three days of rest period, the casted specimens are tested to determine its mechanical strength properties using standard methodology.

scholarly journals Strength Properties of Concrete by using Flyash, Quarry Dust and Crumb Rubber

2019 ◽  
Vol 9 (1) ◽  
pp. 1290-1294
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Crumb Rubber ◽  
Strength Properties ◽  
Waste Materials ◽  
Fine Aggregate ◽  
Conventional Concrete ◽  
Cost Of Construction ◽  
Day By Day ◽  
Quarry Dust

As construction in India and other developing countries are increasing, the consumption of energy and resources are also increasing in same alarming way. Due to urbanization many industries are developed and the industrial wastage is also increasing day by day which is a serious concern to the environment. Many industries produce various end products, which may be used in construction industry at various places. So we focused on some of the waste materials which can be replaced in conventional concrete, and by then cost of construction can be reduced and is economical, also damage caused to the environment can also be reduced, at the same time landfills can also be reduced. So, we focused on reducing the virgin materials in concrete like cement, fine aggregate and coarse aggregate by replacing them with some waste materials which have same properties of cement, fine aggregate and coarse aggregate. The objective of the present work is to find out the effectiveness of fly ash, quarry dust and crumb rubber by replacing them in varied percentages. Here, cement is replaced by fly ash with percentages as 30%, 40%, 50%, 60% and quarry dust as fine aggregate with percentages of 20%, 30%, 40%, 50% along with crumb rubber as coarse aggregate with percentages as 5%, 10%, 15%, 20%. The results in this study have shown a gradual reduction of compressive strength as we kept on adding the crumbed rubber. Even though the strength obtained for 5% usage of crumbed rubber was quite satisfactory.

Experimental Research on the Separation and Recycle of Waste Concrete

2012 ◽  
Vol 450-451 ◽  
pp. 30-33
Author(s):  
Ri Hua Zhang
Keyword(s):  
Experimental Research ◽  
Building Materials ◽  
Coarse Aggregate ◽  
Environmental Issues ◽  
Ultrafine Powder ◽  
Fine Aggregate ◽  
Construction Waste ◽  
World Today ◽  
Waste Concrete ◽  
The World

Concrete is the largest amount of artificial building materials in the world today. According to incomplete statistics, the construction waste produced in china each year can reach about one hundred million tons, and it can reach hundreds of millions of tons due to the long accumulation, which has become a serious social and environmental issues. In this paper, the technology of separation and recycle of waste concrete is studied, and the components of waste concrete are separated effectively, which provides a technical guarantee for the recycling of waste concrete. The waste concrete is disposed through the process of crushing, shelling and sieving and so on, the coarse aggregate and fine aggregate are separated effectively, the properties of coarse aggregate are nearly the same as natural aggregate. When the shelled fines is milled into ultrafine powder and used as concrete admixture, the performance of concrete can be improved. These all provide a new effective way for the recycling of waste concrete.

1989 göçü sonrası Bulgaristan göçmenlerinin yemek kültüründeki değişim

2017 ◽  
Vol 4 (2) ◽  
pp. 227-245
Author(s):  
Cahit Kahraman ◽  
İlhan Güneş ◽  
Nanae Kahraman
Keyword(s):  
Eating Habits ◽  
Supply And Demand ◽  
Food Culture ◽  
Rapid Progress ◽  
Canned Food ◽  
Product Range ◽  
The World ◽  
Before And After ◽  
Day By Day ◽  
Made In

1989 göçü öncesi, dünyada eşzamanlı olarak gittikçe gelişen ve zenginleşen mutfak kültürü, Bulgaristan Türklerini de etkilemiştir. Pazardaki çeşitlilik arttıkça, yemek alışkanlıkları da değişime uğramıştır. Büyük göçten sadece 30-40 sene evvel kısıtlı imkânlar ile sınırlı sayıda yemek çeşidi üretilirken, alım gücünün artmasıyla yemek kültüründe de hızlı gelişmeler olmuştur. Artan ürün çeşitliliği yemeklere de yansımış, farklı lezzetler mutfaklara girmiştir. Göçmen yemekleri denilince hamur işleri, börek ve pideler akla gelir. Ayrıca, göçmenlerin çok zengin turşu, komposto ve konserve kültürüne sahip oldukları da bilinir. Bu çalışma, 1989 öncesi Bulgaristan’ın farklı bölgelerinde yaşayan Türklerin yemek alışkanlıklarına ışık tutmakla birlikte, göç sonrasında göçmen mutfak kültüründe bir değişiklik oluşup oluşmadığını konu almaktadır. Bu amaçla, 1989 yılında Türkiye’ye göç etmiş 50 kişiye 8 sorudan oluşan anket düzenlenmiştir. Bu verilerden yola çıkarak oluşan bulgular derlenmiş ve yeni tespitler yapılmıştır. Ayrıca, Türkiye’nin farklı bölgelerine yerleşen göçmenler, kendi göçmen pazarlarını kurmuşlardır. Bulgaristan’dan getirilen ürünlerin bu pazarlarda satılması böyle bir arz talebin hala devam ettiğine işaret etmektedir.ABSTRACT IN ENGLISHThe Diversity in Cuisine Culture of the Immigrants from Bulgaria After 1989 MigrationThe Cuisine culture that has been developing and getting rich day by day contemporaneously in the world before 1989 migration has also had an impact on Bulgarian Turks. By the increase in diversity in the market, eating habits have changed. While producing a limited number of food types with limited opportunities just some 30 or 40 years before the ‘Big Migration’, there has been a rapid progress in food culture by the help of the increase in purchase power. Enhancing product range has been reflected in food, and different tastes have entered the cuisines. When we say immigrant, the first things that come to our mind are pastry, flan and pitta bread. Moreover, it is also known that immigrants have a very rich cuisine culture of pickle, stewed fruit, and canned food. This study aims both to disclose the eating habits of Turks living in different regions of Bulgaria before 1989 and to determine whether there has been a difference in immigrant cuisine culture before and after the migration. For this purpose, a questionnaire consisting of 8 questions has been administered to 50 people who migrated to Turkey in 1989. The results gathered from these data have been compiled and new determinations have been made. In addition, immigrants that settled in different regions of Turkey have set their own immigrant markets. The fact that the products brought from Bulgaria are being sold in these markets shows that this kind of supply and demand still continues.

Awareness on Sustainability Perspective among Consumers’ of Tea

2019 ◽  
Vol 118 (7) ◽  
pp. 111-116
Author(s):  
Dr. M. Ayisha Millath ◽  
Dr. K. Malik Ali
Keyword(s):  
Sample Size ◽  
Positive Relationship ◽  
Health Benefits ◽  
High Price ◽  
Educational Qualification ◽  
Lack Of Information ◽  
The World ◽  
Correlation Result ◽  
Day By Day

Tea is an imperative beverage elsewhere in the world.  The need and demand for tea are increasing day by day.  Tea Association of USA expects continued growth in tea sales due to awareness on its health benefits. There are more than 3000 kinds of tea varieties are there but only four varieties are widely used. The authors investigated the opinion on sustainability perspectives and problems faced by them while they intend to buy. Willing Participants are included in survey with the sample size of 237.  The correlation result revealed that there is a positive relationship between educational qualification and sustainability perspectives of tea products among consumers. .  It is also found that lack of information and high price were the major problems faced by tea consumers while intend to buy sustainable tea. So the tea manufacturers and processors must throw light on these issues to improve its preference among consumers.

ASSESSMENT OF KIDNEY FUNCTIONAL RESERVE ON THE BACKGROUND OF ANTI-AGGREGATE THERAPY IN CHRONIC KIDNEY DISEASE II-III STAGE

2020 ◽  
Vol 6 (1) ◽  
pp. 49-54
Author(s):  
Khabib Barnoev ◽  
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Comparative Study ◽  
Early Stage ◽  
Raw Material ◽  
Functional Reserve ◽  
Functional Reserves ◽  
Term Administration ◽  
Antiaggregant Therapy

The article presents the results of a study to assess the functional reserve of the kidneys against the background of a comparative study of antiaggregant therapy dipyridamole and allthrombosepin in 50 patients with a relatively early stage of chronic kidney disease. Studies have shown that long-term administration of allthrombosepin to patients has resulted in better maintenance of kidney functional reserves. Therefore, our research has once again confirmed that diphtheridamol, which is widely used as an antiaggregant drug in chronic kidney disease, does not lag behind the domestic raw material allthrombosepin

Risk and Return of Retail Sukuk and Retail Bond in Indonesia Period 2008-2017 (Comparative Study)

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Rahma Yudi Astuti ◽  
Asad Arsya Brilliant Fani
Keyword(s):  
Standard Deviation ◽  
Comparative Study ◽  
Stock Exchange ◽  
Secondary Data ◽  
Bond Market ◽  
Bond Pricing ◽  
Risk And Return ◽  
Underlying Asset ◽  
The Real ◽  
The World

Sukuk and Bonds has differences and similarities. Fundamental differences between sukuk and bonds are first, underlying asset in every sukuk issuance, concept of profit loss sharing and the use of Islamic contracts. Whereas conducted research in practice of differences between sukuk and bonds are still an on-going discussion. This study aims to add the evidence in the discussion regarding whether there is differences between sukuk and bonds in the world of practice, provide investment preferences as well as educating investors in choosing sukuk or bonds as a sustainable and smooth instrument. The method used is Mann Whitney U-Test to test whether there is a different between yield to maturity (return) and standard deviation (risk) of both instruments. Using secondary data of Retail Sukuk (SR) and Retail Bonds (ORI) period 2008-2017 obtained from Indonesia Stock Exchange, Indonesia Bond Market Directory and Indonesia Bond Pricing Agency. The result shows that there is no significance difference of retail sukuk return and risk with retail bonds in Indonesia. Besides retail bonds are show higher return than retail sukuk because of higher coupon and longest mature date. While, retail sukuk is more stable rather than bonds as it backed up by the real underlying asset. Keywords: Retail Sukuk (SR), Retail Bonds (ORI), Yield to Maturity

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