Properties of Concrete Containing Scrap-Tire Chips

2011 ◽  
Vol 399-401 ◽  
pp. 1251-1256 ◽  
Author(s):  
Wai Ching Tang ◽  
Hong Zhi Cui ◽  
Yiu Lo
Keyword(s):  
Environmental Issues ◽  
Normal Weight ◽  
Scrap Tire ◽  
Scrap Tires ◽  
Bonding Agents ◽  
Normal Weight Concrete ◽  
Tire Chips ◽  
Increase With Increase ◽  
The World ◽  
Concrete Matrix

Nowadays, one of the most essential environmental issues around the world is to deal with the scrap tire problem. Tires that are used, rejected or unwanted are classified as scrap tires and need to be managed responsibly. In this paper, the scrap tires were shredded into pieces and used to mix with normal weight concrete. Extensive laboratory tests were carried out and the focus of this paper was to characterize the mechanical and permeability properties of concrete containing scrap tires. The main parameters studied were chipped tire content and size. The results showed that the scrap-tire chips without adding special bonding agents apparently showed an even distribution in the mortar and concrete matrix. The elastic modulus, compressive and tensile strengths of scrap tire concrete in general were found lower than that of the control concrete and the differences became significant when the content and size of chipped tires in the mix were increased. Besides, the coefficients of water permeability of concrete were found to increase with increase of chipped tires in the mix.

scholarly journals Ameliorating Precast Concrete Curbs Using Rubber and Nano Material

2017 ◽  
Vol 3 (2) ◽  
pp. 105-110
Author(s):  
Mohammad Ebrahim Komaki ◽  
Amirreza Ghodrati Dolatshamloo ◽  
Mahdi Eslami ◽  
Sahar Heydari
Keyword(s):  
Precast Concrete ◽  
Environmental Issues ◽  
Mix Design ◽  
Scrap Tire ◽  
Tire Rubber ◽  
The World ◽  
Nano Material ◽  
Waste Tire Rubber ◽  
Scrap Tire Rubber ◽  
Rubber Concrete

Disposal of waste tire rubber has become one of the major environmental issues in each part the World. One of the possible solutions to dispose of scrap tire rubber is using them into concrete curbs. This paper presents a new method to ameliorate the rubber concrete using a particular rubber size and Nano Material. Initially six mix designs were performed to determine the optimized size and percentage of rubber according to compressive strength. Afterwards, the major concrete curbs were made with the optimum mix design. Three different samples were made to determine the effects of rubber and Nano. One of which was made without rubber and Nano, the other was made with rubber and the last with rubber and Nano. Experiments were carried out to determine the durability and strength of specimens according to ISIRI-12728.

Utilizing of Crumb Rubber Derived Recycled Scrap Tires in Masonry Application: A Review

2021 ◽  
Vol 1030 ◽  
pp. 73-87
Author(s):  
Amin Al-Fakih ◽  
Bashar S. Mohammed ◽  
M.S. Liew ◽  
M.W.A. Wahab ◽  
Sani Haruna
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Manufacturing Process ◽  
Physical And Mechanical Properties ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Scrap Tire ◽  
Scrap Tires ◽  
Literature Research ◽  
The World

The Disposal of Scrap Tires has Resulted in Major Environmental Problems Worldwide. Therefore, Utilizing Scrap Tires as Crumb Rubber is being Used in Brick Production to Improve the Properties of the Bricks as well as to Provide Feasible Waste Management of Scrap Tires. this Study Presents the Literature Research on Utilizing Crumb Rubber in Bricks Manufacturing. the Review Summarized the Manufacturing Process of Producing Crumb Rubber and then Documented the Application of Crumb Rubber in Masonry. the Results Show that the Compressive Strength of Masonry Bricks Decreases with the Increased Percentage Substitution of Crumb Rubber as a Replacement of Fine Aggregate while the Water Absorption Increased. Moreover, the Addition of Crumb Rubber in Masonry Applications Reduce the Density which Produce Lightweight Masonry Products. Generally, the Findings Confirmed that the Masonry Bricks Incorporated Crumb Rubber Exhibit Good Physical and Mechanical Properties. the Usage of Crumb Rubber in Bricks Making Helps to Solve Problems Associated with Scrap Tire Management all over the World.

Use of Phosphatidylcholine in the Treatment of Localized Fat Deposits. Results and expectations

2017 ◽  
Vol 68 (7) ◽  
pp. 1438-1441 ◽  
Author(s):  
Sorin Berbece ◽  
Dan Iliescu ◽  
Valeriu Ardeleanu ◽  
Alexandru Nicolau ◽  
Radu Cristian Jecan
Keyword(s):  
World Health Organisation ◽  
Normal Weight ◽  
World Health ◽  
Basic Substance ◽  
Physical Exercises ◽  
Fat Deposits ◽  
The World ◽  
The Common ◽  
Global Health Problem ◽  
Over Time

Obesity represents a global health problem. According to the latest studies released by the World Health Organisation (WHO), 1.7 billion currently in excess of normal weight individuals, of which approx. 75% are overweight (body mass index - BMI 25 to 30). The common form of excess adipose tissue manifestation in overweight individuals is localized fat deposits with high (abdominal) or low (buttocks and thighs) disposition. Although the overweight can be corrected relatively easy by changing behavioral habits or food, a constant physical exercises program or following a diet food are not accessible to all through the efforts of will, financial and time involved. Several methods have been studied and tested over time to eliminate more or less invasive fat deposits with varying efficacy and adverse effects. Chemical lipolysis using phosphatidylcholine as the basic substance was initially used in hypercholesterolemia and its complications and was rapidly adopted in mesotherapy techniques for the treatment of fat deposits. This study reveals the results obtained using Dermastabilon on a sample of 16 patients, the time allocated to treatment and discomfort being minimal, and rapid and notable results. There were no side effects.

The Environmental Protection Consciousness and Countermeasures

2014 ◽  
Vol 962-965 ◽  
pp. 1509-1512
Author(s):  
Lin Liu ◽  
Pin Lv
Keyword(s):  
Economic Development ◽  
Environmental Protection ◽  
Natural Environment ◽  
Human Activities ◽  
Environmental Issues ◽  
The World ◽  
The Future ◽  
Environmental Concepts ◽  
Environment Sustainability ◽  
Development And Environment

There are various signs indicating that the Earth's natural environment is changing toward unfavorable direction for species, which is highly suspected to be connected with human activities. In the last century, people all over the world have realized the severity of environmental issues. In the long history, Chinese ancient had already development good rules and methods to reach balance between economic development and environment sustainability. This paper will discuss how environmental concepts forms and which methods could be applied in the future.

scholarly journals Efficiency factor and modulus of elasticity of lightweight concrete with expanded clay aggregate

2010 ◽  
Vol 3 (2) ◽  
pp. 195-204 ◽  
Author(s):  
W.G Moravia ◽  
A. G. Gumieri ◽  
W. L. Vasconcelos
Keyword(s):  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Large Scale ◽  
Lightweight Concrete ◽  
Weight Ratio ◽  
Lightweight Aggregate ◽  
Normal Weight ◽  
Lightweight Aggregate Concrete ◽  
Empirical Methods ◽  
Normal Weight Concrete

Nowadays lightweight concrete is used on a large scale for structural purposes and to reduce the self-weight of structures. Specific grav- ity, compressive strength, strength/weight ratio and modulus of elasticity are important factors in the mechanical behavior of structures. This work studies these properties in lightweight aggregate concrete (LWAC) and normal-weight concrete (NWC), comparing them. Spe- cific gravity was evaluated in the fresh and hardened states. Four mixture proportions were adopted to evaluate compressive strength. For each proposed mixture proportion of the two concretes, cylindrical specimens were molded and tested at ages of 3, 7 and 28 days. The modulus of elasticity of the NWC and LWAC was analyzed by static, dynamic and empirical methods. The results show a larger strength/ weight ratio for LWAC, although this concrete presented lower compressive strength.

scholarly journals Comparing climate change indices between a northern (arid) and a southern (humid) basin in Mexico during the last decades

2018 ◽  
Vol 15 ◽  
pp. 231-237 ◽  
Author(s):  
Martín José Montero-Martínez ◽  
Julio Sergio Santana-Sepúlveda ◽  
Naydú Isabel Pérez-Ortiz ◽  
Óscar Pita-Díaz ◽  
Salvador Castillo-Liñan
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Arid Region ◽  
Climate Changes ◽  
Previous Analysis ◽  
Environmental Issues ◽  
The Other ◽  
The World ◽  
Humid Area ◽  
Different Parts

Abstract. It is a matter of current study to determine potential climate changes in different parts of the world, especially in regions like a basin which has the potential to affect socioeconomic and environmental issues in a defined area. This study provides a comparison between several climate change indices trends of two very different basins in Mexico, one located in the northern arid region (the Conchos River basin) and the other in the southern humid area (the Usumacinta River basin). First, quality control, homogenization, and completion of the missing data were applied before calculating the climate change indices and their respective trends for the combined period 1961–1994. A clear warming signal was found for the two basins in addition to an increment in the DTR, in agreement with other studies in Mexico. Also, the Conchos River basin was found to be more humid and the Usumacinta River basin drier, in accordance to a supposed seesaw behavior indicated in previous analysis.

scholarly journals Conservation of Plants and Trees in the Light of Prophetic Teachings

2020 ◽  
Vol 5 (1) ◽  
pp. 65-84
Author(s):  
Sumaira Nawaz ◽  
Dr. Shah Moeen ud Din Hashmi
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Environmental Issues ◽  
Descriptive Study ◽  
Social Scientists ◽  
Environmental Behaviors ◽  
Environment Friendly ◽  
Human Behaviors ◽  
The World ◽  
Ecological Problems

Article endeavors to analyze the prophetic guiding principles regarding human behaviors related to plants and trees being an important component of our environment. The discussion mainly deals with the key environmental issues emphasizing plantation and its significance for balancing the equilibrium of the environment. Additionally, it thrashes out that humans are urged to seedling the plantation even the world is to be ended in Islam. The present study is delimited to the present ecological crises faced by society and a great challenge to the globe. The current ecological problems i.e global warming and climate change are interpreted just to analyze the environmental behaviors in Hadith literature. However, a profundity descriptive study has been conducted in the most influential way to examine the prophetic rules for human behaviors related to trees and plants being environment friendly. Furthermore, the existing practices of humans related to such an environmental sphere also been aptly figure out to highlight all possible ways in the light of prophetic guidance to deal with prevailing environmental issues. Inconsistency between religious teachings and human behaviors need the keen interest of religious scholars and social scientists to carefully harmonize both for maintaining the ecological balance in nature.

scholarly journals Calculating the carbon footprint of the artisanal common hake fishery (Merluccius gayi gayi) in Caleta Portales, Valparaíso, Chile

2021 ◽  
Vol 49 (4) ◽  
pp. 538-550
Author(s):  
Laura Naranjo ◽  
Jorge Castillo ◽  
Valesca Montes ◽  
Eleuterio Yáñez
Keyword(s):  
Life Cycle ◽  
Carbon Footprint ◽  
Positive Impact ◽  
Environmental Issues ◽  
Iso 14040 ◽  
Greenhouse Gasses ◽  
Consumption Data ◽  
The World ◽  
Source Of Information ◽  
Hake Fishery

Society's awareness of environmental issues increases every day. In this context, the concept of carbon footprint (CF) arises as a calculation tool that quantifies greenhouse gasses (GHG) emitted during the life cycle (LC) of a product. This calculation method is used in many productive sectors throughout the world; however, the Chilean fisheries sector has not notified the use of this tool or initiatives in that sense. This study performs a calculation of the CF of artisanal gillnet hake (Merluccius gayi gayi) fishery of the Caleta Portales, located in Valparaíso, Chile. The ISO 14040: 2006 methodology was used. The analysis was limited from the boat departure until the catch is landed, as a gate-to-gate life cycle assessment (LCA). The fuel consumption data and information related to the fleet were used as the main source of information. The Caleta Portales hake landings were 1,340.484 kg in 2011 and 703,411 kg in 2012. This fleet released into the atmosphere in 2011, 0.47 CO2 equivalent per kg of hake landed, and 0.58 kg CO2 eq, in 2012. It is the first result of CF reported in a Chilean fishery. This result can lead to an increase in the competitiveness of this hake fishery, as it can generate a positive impact on encouraging consumers to prefer the consumption from those places that have calculated the CF and are less than other food products.

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