Effect of age and waste crumb rubber aggregate proportions on flexural characteristics of self‐compacting rubberized concrete

2021 ◽  
Author(s):  
Dimuthu Wanasinghe ◽  
Farhad Aslani ◽  
Kunyou Dai
Keyword(s):  
Crumb Rubber ◽  
Rubberized Concrete ◽  
Effect Of Age ◽  
Waste Crumb Rubber

Durability Performance of Polymeric Waste Crumb Rubber as Fine Aggregates Replacement in Concrete

2015 ◽  
Vol 1129 ◽  
pp. 508-515
Author(s):  
D.S.Q. Abg Adenan ◽  
Kartini Kamaruddin
Keyword(s):  
Water Absorption ◽  
Water Permeability ◽  
Crumb Rubber ◽  
Waste Materials ◽  
Fine Aggregate ◽  
Rubberized Concrete ◽  
Fine Aggregates ◽  
Polymeric Waste ◽  
Durability Performance ◽  
Waste Crumb Rubber

This paper presents a study on durability performance of polymeric waste crumb rubber as partial fine aggregates replacement in concrete grade 30. The use of aggregates as constituent in concrete production commonly lead to a question about the sources of natural aggregates since concrete consumption has been increasing nowadays. Rubberized concrete has been introduced whereby natural fine aggregates are being replaced with crumb rubber in concrete since there are problems with availability of natural sand as fine aggregate material. Besides, polymeric waste materials production has been increasing. Crumb rubber used in this study was manufactured by special mill where scrap tire rubber is grinded and screened into smaller size of particles. Rubberized concrete is produced by mixing with different percentages of 10, 20 and 30% of crumb rubber as fine aggregates replacement. Water cement ratio of 0.53 and curing periods for 28 days and 60 days were considered in this study. The water absorption test was conducted to determine the percentages of water absorption, while water permeability test was conducted to determine the coefficient of permeability in concrete. Absorption and permeability are governed by the capillary pores in the cement paste. Pores that are too large resulted in high absorption and permeability, while pores that are small resulted in a low absorption and permeability. The durability performance in term of water absorption and water permeability in concrete was improved by introducing crumb rubber as polymeric waste materials to replace fine aggregates in concrete. The recycling and reusing of polymeric waste materials in concrete attract the interest worldwide which can promote sustainability and reduce the high environmental impact of the concrete technology.

Recycling of waste crumb rubber into a commercial materials

2021 ◽  
Author(s):  
S. Godwin Barnabas ◽  
K. Arun Vasantha Geethan ◽  
M. Venkatesh Perumal
Keyword(s):  
Crumb Rubber ◽  
Waste Crumb Rubber

EFFECT OF CRUMB RUBBER ON CONCRETE STRENGTH AND CHLORIDE ION PENETRATION RESISTANCE

2015 ◽  
Vol 77 (32) ◽  
Author(s):  
Nurazuwa Md Noor ◽  
H. Hamada ◽  
Y. Sagawa ◽  
D. Yamamoto
Keyword(s):  
Structural Strength ◽  
Salt Water ◽  
Chloride Ion ◽  
Crumb Rubber ◽  
Rubberized Concrete ◽  
Migration Test ◽  
Ion Diffusion ◽  
Steady State Condition ◽  
Chloride Ion Penetration ◽  
Chloride Ion Diffusion

This paper present the effect of crumb rubber on its ability to produce concrete with structural strength when it was used directly from the plant without any treatment process. Crumb rubber was added as fine aggregates at 0%, 10%, 15% and 20% of sand volume meanwhile silica fume was added at 10% by cement weight. Three main series of concrete namely rubberized concrete with water-to-cement ratio of 50% and 35% was design and development of compressive strength was observed from day 7 until 91 days. Also, effectiveness of crumb rubber under flexural strength and splitting tensile strength was studied at 28 days curing age. Effect of crumb rubber on durability performance was done on chloride ion penetration resistance performance by migration test and by immersion in salt water. Chloride ion diffusion in rubberized concrete by migration test was carried out under steady state condition using effective diffusion coefficient, De meanwhile, immersion test in salt water was conducted under non-steady state condition using apparent diffusion coefficient, Da. Results showed that compressive strength was decrease with the increasing of crumb rubber in the mixture.  Even though the strength were reducing with the inclusion of crumb rubber, the reduction were less than 50% and it achieved acceptable structural strength. Chloride transport characteristics were improved by increasing amount of CR and rubberized concrete with w/c = 0.35 gave better resistance against chloride ion compared to w/c = 0.50 with more than 50% difference. Silica fume provide slightly strength increment compared to normal rubberized concrete and the same behavior was observed during chloride ion diffusion test.

Engineering properties of rubberized concrete

1992 ◽  
Vol 19 (5) ◽  
pp. 912-923 ◽  
Author(s):  
Neil N. Eldin ◽  
Ahmed B. Senouci
Keyword(s):  
Plain Concrete ◽  
Crumb Rubber ◽  
Engineering Properties ◽  
Unit Weight ◽  
Rubberized Concrete ◽  
Portland Cement Concrete ◽  
Freezing And Thawing ◽  
Scrap Tire ◽  
Plastic Energy ◽  
Freezing And Thawing Cycles

Growing piles of discarded tires are potential sources of fire and health hazards. The current disposal methods are wasteful and costly. As a possible solution to the problem of scrap-tire disposal, an experimental study was conducted to examine the potential use of rubber aggregate (tire chips and crumb rubber) as mineral aggregate substitute in Portland cement concrete mixes. The research focused on determining the strength characteristics of rubberized concrete and examined the relationship between the size, percentage, and shape of rubber aggregate and the strength measured.Rubberized concrete was found to possess good esthetics, acceptable workability, and a smaller unit weight than plain concrete. However, it exhibited low compressive and tensile strengths and lower resistance to repeated freezing and thawing cycles than that of plain concrete. A statistical analysis of the experimental data suggested that only the percentage by volume of rubber in the mix has a significant effect on strength. The size and shape was found insignificant. Unlike plain concrete, rubberized concrete did not demonstrate the typical brittle failure. It exhibited a ductile, plastic failure, and showed the ability to absorb a large amount of plastic energy under compressive and tensile loads. Key words: rubberized concrete, concrete properties, compression, durability, failure, modulus of elasticity, slump, tension, toughness, workability.

scholarly journals Prediction Models for the Mechanical Properties of Self-Compacting Concrete with Recycled Rubber and Silica Fume

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1821 ◽  
Author(s):  
Robert Bušić ◽  
Mirta Benšić ◽  
Ivana Miličević ◽  
Kristina Strukar
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Silica Fume ◽  
Prediction Models ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Rubberized Concrete ◽  
Self Compacting Concrete ◽  
Recycled Rubber ◽  
European Standards

The paper aims to investigate the influence of waste tire rubber and silica fume on the fresh and hardened properties of self-compacting concrete (SCC) and to design multivariate regression models for the prediction of the mechanical properties of self-compacting rubberized concrete (SCRC). For this purpose, 21 concrete mixtures were designed. Crumb rubber derived from end-of-life tires (grain size 0.5–3.5 mm) was replaced fine aggregate by 0%, 5%, 10%, 15%, 20%, 25%, and 30% of total aggregate volume. Silica fume was replaced cement by 0%, 5%, and 10% of the total cement mass. The optimal replacement level of both materials was investigated in relation to the values of the fresh properties and mechanical properties of self-compacting concrete. Tests on fresh and hardened self-compacting concrete were performed according to the relevant European standards. Furthermore, models for predicting the values of the compressive strength, modulus of elasticity, and flexural strength of SCRC were designed and verified with the experimental results of 12 other studies. According to the obtained results, mixtures with up to 15% of recycled rubber and 5% of silica fume, with 28 days compressive strength above 30 MPa, were found to be optimal mixtures for the potential future investigation of reinforced self-compacting rubberized concrete structural elements.

Correlation of strength, rubber content, and water to cement ratio in rubberized concrete

2005 ◽  
Vol 32 (6) ◽  
pp. 1075-1081 ◽  
Author(s):  
Ashraf M Ghaly ◽  
James D Cahill IV
Keyword(s):  
Compressive Stress ◽  
Experimental Testing ◽  
Concrete Strength ◽  
Crumb Rubber ◽  
Test Results ◽  
Rubberized Concrete ◽  
Rubber Content ◽  
Research Project ◽  
Conventional Concrete ◽  
Cement Ratio

Waste rubber tires that cannot be processed for useful applications are numbered in the millions around the world. The build up of old rubber tires in landfills is commonly considered a major threat to the environment, and it is unquestionably a burden on landfill space. This research project was an investigation into the possibility of using fine rubber particles in concrete mixtures. The experimental testing program was designed to study the effect of the addition of crumb rubber, as replacement of a portion of fine aggregates (sand), on the strength of concrete. Rubber was added to concrete in quantities of 5%, 10%, and 15% by volume of the mixture. Three different water/cement ratios were used: 0.47, 0.54, and 0.61. A total of 180 concrete cubes were made. The cubes were tested in compression at 1, 7, 14, 21, and 28 d with the load continuously and automatically measured until failure. The load values were used to calculate compressive stress as related to different rubber contents and water/cement ratios. Compression test results were used to develop several plots relating rubber content and water/cement ratio to compressive stress of concrete. Test results gathered in this research project indicated that the addition of crumb rubber to concrete results in a reduced strength as compared with that of conventional concrete. Based on the experimental results, correlations have been developed to estimate the reduction in concrete strength as a function of the rubber content in the mix.Key words: compressive strength, concrete, crumb rubber, rubberized concrete.

A SHORT REVIEW ON USING CRUMB RUBBER AS MODIFICATION OF BITUMEN BINDER

2016 ◽  
Vol 78 (7-3) ◽  
Author(s):  
Md. Maniruzzaman A. Aziz ◽  
Zohair Ahmed Altieb ◽  
Khairul Anuar Bin Kassim ◽  
Hauwa Baffa Jibrin
Keyword(s):  
Heavy Traffic ◽  
Influencing Factor ◽  
Road Construction ◽  
Short Review ◽  
Crumb Rubber ◽  
High Viscosity ◽  
Wet Process ◽  
Physical Tests ◽  
On The Road ◽  
Waste Crumb Rubber

The increasing consumption of waste tire has generated many problems such as increasing landfill space, environmental pollution and causing health hazards. Parallel to this is the increasing of roads construction as a result of heavy traffic on roads. This study reviews to the use of crumb rubber (waste tires in powder form) in bitumen using the wet process. The study focuses on the crumb rubber as a replacement to the total weight of bitumen. The design or life span for all highways and urban roads is 10 – 20 years. Unfortunately, damages or distresses on pavements are still occurring before reaching the maximum period of the designed road serviceability. Among the major influencing factor that is contributing to this distress is the repeated heavy traffic loading on the road surfaces. Moreover, the use of waste crumb rubber in road construction as a pavement surface has a better skid resistance, fatigue crack resistance and increased rut resistance. The review includes physical tests that are used to determine the physical properties of bitumen and modified crumb rubber mix. The physical tests involve penetration test, softening point test and viscosity test. The second stage is rheological tests like rolling thin film oven test (RTFOT), pressure aging vessel (PAV) and dynamic shear rheometer (DSR) tests. The expectations from the study are to develop bitumen with waste crumb rubber that would minimize the costs of bitumen and providing better physical and rheological properties compared to the convention bitumen based on the tests that was conducted. Crumb rubber modifier as improved resistance to rutting due to high viscosity, Improved resistance to surface initiated, reduce fatigue/ reflection cracking, lower pavement maintenance costs, and saving in energy and natural resource.

Mechanical Properties of Surface Mortar with Waste Crumb Rubber

2014 ◽  
Vol 584-586 ◽  
pp. 917-920
Author(s):  
Gang Xue ◽  
Chun Feng Wu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Rubber Particle ◽  
Impact Resistance ◽  
Crumb Rubber ◽  
Application Performance ◽  
Waste Rubber ◽  
Aging Properties ◽  
Rubber Particles ◽  
Waste Crumb Rubber

Applying modified waste rubber particle to surface mortar can give full play of the unique characteristics to utilize the waste and decrease environmental pollution. In order to study the application performance of crumb rubber mortar, five different mortar proportions are selected to determine the compressive strength, flexural strength, impact strength and thermal aging strength. The results show that rubber particles mortar possess excellent toughness, impact resistance and heat aging properties.

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