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Journal ArticleDOI

Properties of concrete containing scrap-tire rubber--an overview.

01 Jan 2004-Waste Management (Pergamon)-Vol. 24, Iss: 6, pp 563-569
TL;DR: An overview of some of the research published regarding the use of scrap-tires in portland cement concrete and the benefits of using magnesium oxychloride cement as a binder for rubberized concrete mixtures are presented.
About: This article is published in Waste Management.The article was published on 2004-01-01. It has received 772 citations till now. The article focuses on the topics: Properties of concrete & Portland cement.
Citations
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Journal ArticleDOI
TL;DR: The effect of recycled and waste plastic on bulk density, air content, workability, compressive strength, splitting tensile strength, modulus of elasticity, impact resistance, permeability, and abrasion resistance is discussed in this paper.

804 citations


Cites background from "Properties of concrete containing s..."

  • ...Many researchers have reported the use of scrap tire/rubber in cement mortar and concrete, and Siddique and Naik (2004) have published a review paper, detailing the research on the use of scrap tire/rubber in concrete....

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Journal ArticleDOI
TL;DR: In this paper, a comprehensive review has been carried out in order to show the effects of the main process conditions (heating rate, temperature, pressure, carrier gas flow rate and type, volatiles residence time and pyrolysis time) on physicochemical properties and distributions of the resulting products (gas, liquid and solid fractions).
Abstract: This review deals with the state-of-the-art of waste tyre pyrolysis for the first time in literature. Pyrolysis has been addressed as an attractive thermochemical process to tackle the waste tyre disposal problem while allowing energy recovery. Pyrolysis enables the separation of carbon black from tyres and the volatile matter released (condensable and non-condensable compounds) has the potential of renewable energy recovery given the significant proportion of natural rubber present in the tyre. Given this waste-to-energy pathway, a comprehensive review has been carried out in order to show the effects of the main process conditions (heating rate, temperature, pressure, carrier gas flow rate and type, volatiles residence time and pyrolysis time) on the physicochemical properties and distributions of the resulting products (gas, liquid and solid fractions). It has also been reviewed the influence of the size and composition of the feedstock. All reported results have been framed regarding the type of reactor as well as the experimental conditions used to avoid contradictions among the large number of publications on the subject. It is shown that the occurrence of secondary reactions is very sensitive to the interaction of the aforementioned variables. Also, the main properties of the pyrolytic products are pointed out. The liquid and gaseous fractions obtained are a valuable fuel source; while the solid fraction (char) has the recovery potential of low- grade carbon black or as carbon adsorbent after applying an activation step. Special attention has been given to the liquid fraction, highlighting its properties as alternative fuel in compression ignition engines.

596 citations

Journal ArticleDOI
TL;DR: In this article, the performance of concrete mixtures incorporating 5%, 7.5% and 10% of discarded tyre rubber as aggregate and cement replacements was investigated, and the results showed that with up to 5% replacement, in each set, no major changes on concrete characteristics would occur, however, with further increase in replacement ratios considerable changes were observed.

591 citations


Cites background from "Properties of concrete containing s..."

  • ...Their results indicate that the size, proportion, and surface texture of rubber particles affect the strength of used tyre rubber contained in concrete [4-12]....

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Journal ArticleDOI
TL;DR: Ulasonic analysis reveals large reductions in the ultrasonic modulus and high sound absorption for tire-rubber concrete, and a significant decrease in the brittle behavior of concrete with increasing rubber content is also demonstrated using nonlinearity indices.

506 citations

Journal ArticleDOI
TL;DR: In this paper, the use of crumb rubber in asphalt paving mixture has long been proven successful due to good compatibility and interaction between rubber particles and asphalt binder, leading to various improved properties and performance of asphalt mixtures.

457 citations


Cites background from "Properties of concrete containing s..."

  • ...Rubber has much lower specific gravity than aggregates, so the replacement of aggregates with rubber consequently reduces the overall specific gravity of the rubber modified PCC [69]....

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References
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01 Jan 1982
TL;DR: Wu et al. as discussed by the authors published more than 1000 papers from TRR journals beginning with volume 2141 and more than 700 papers from the TRR journal volumes 2090 starting with volume 2090.
Abstract: 2010 Content Included are approximately 900 papers from TRR Journals beginning with volume 2141. This is a one-time fee. 2009 Content Included are more than 700 papers from TRR Journals beginning with volume 2090. This is a one-time fee. 2004 through 2008 Content Included are more than 3900 papers from TRR journal volumes 1862 through 2089. This is a one-time fee. TRB Affiliate Information For information on becoming a TRB Affiliate, contact Kelvin Jordan at 202-334-3216, e-mail: TRBAffiliates@nas.edu. TRR Print Only and Print and Online Pricing For pricing of print and print and online access, contact Jessica Wu at 202-334-3072, e-mail: TRBSales@nas.edu, or follow this link.

3,288 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examined strength and toughness properties of concrete in which different amounts of rubber-tire particles of several sizes were used as aggregate, and the concrete mixtures exhibited lower compressive and splitting-tensile strength than did normal concrete.
Abstract: Accumulations of worn‐out automobile tires create fire and health hazards. As a possible solution to the problem of scrap‐tire disposal, an experimental study was conducted to examine the potential of using tire chips and crumb rubber as aggregate in portland‐cement concrete. This paper examines strength and toughness properties of concrete in which different amounts of rubber‐tire particles of several sizes were used as aggregate. The concrete mixtures exhibited lower compressive and splitting‐tensile strength than did normal concrete. However, these mixtures did not demonstrate brittle failure, but rather a ductile, plastic failure, and had the ability to absorb a large amount of plastic energy under compressive and tensile loads. A mathematical model is used to describe the effects of rubber aggregate on the compressive and tensile strength reduction of concrete.

680 citations

Journal ArticleDOI
TL;DR: In this article, the use of recycled tire rubber in a portland cement concrete (PCC) mixture is investigated as a possible alternative for nonconventional PCC mixtures.
Abstract: The use of recycled tire rubber in a portland cement concrete (PCC) mixture is investigated as a possible alternative for nonconventional PCC mixtures. This study is focused on the determination of the practicality of producing such mixes and evaluating their engineering properties. An experimental program was developed to use two types of tire rubber (fine crumb rubber and coarse tire chips) in PCC mixtures. A control PCC mix is designed using American Concrete Institute mix design methods, and three groups of rubberized PCC mixes were developed by partially replacing the aggregate with rubber. Eight tire rubber contents were used in each group. Mixes were tested in compressive and flexural strength in accordance to ASTM standards. Results show that rubberized PCC mixes can be made and are workable to a certain degree with the tire rubber content being as much as 57% of the total aggregate volume. However, strength results show that large reductions in strength would prohibit the use of such a high rubber content. It is suggested that rubber contents should not exceed 20% of the total aggregate volume. A characteristic function that quantifies the reduction in strength for rubberized concrete mixes was developed that could be useful for mix design purposes. Rubberized concrete mixes may be suitable for nonstructural purposes such as lightweight concrete walls, building facades, and architectural units. They could also be used as cement aggregate bases under flexible pavements. Fire hazards are of major concern and need to be thoroughly investigated before recommendations for practical implementation are drawn.

636 citations

Journal ArticleDOI
TL;DR: In this article, the changes of the properties for the rubberized concretes were investigated in terms of both size and amount of the rubber chips, and it was observed that plastic energy capacities began to increase when the high elastic energy capacity of normal concrete was reduced by adding rubber.

537 citations

Journal ArticleDOI
TL;DR: In this paper, the surface modification of powdered tire rubber to increase its adhesion to cement paste was studied and the results of fracture energy and flexural and compressive strength showed that the addition of rubber particles improves the toughness and reduces the porosity of the specimens.

511 citations