Studies on Properties of Concrete Using Crumb Rubber as Fine Aggregate

In this study, the effect of using crumb rubber and recycled aggregates on the mechanical properties of concrete has been evaluated as areplacement of fine and coarse aggregates In order to add the admixtures and evaluate their combined effect, 20 different types of concrete mixture ratio were prepared. The results indicated that in those samples containing crumb rubber and recycled aggregates the compressive strength is reduced and adding fiber up to 0.1%. to these concrete samples can improve the compressive strength Also, the tensile strength of the samples mixed with crumb rubber and recycled aggregates were decreased, and with the addition of propylene fiber up to 0.4%. the tensile strength slightly increased Moreover by adding the crumb rubber to the samples the elasticity modulus was reduced but by adding fiber to samples about 0.1% and 0.2.% the modulus of elasticity of concrete in all samples were increased. According to the results, it can be said that using the combination of 5% of crumb rubber as a replacement of fine aggregate, and the combination of 35% of recycled aggregates as a replacement of coarse aggregate, and also by adding 0.1% polypropylene fiber in volumetric percentage of concrete along with adding 7% of micro silica as a replacement of cement led to the best effect on the mechanical properties of concrete.

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

Materials ◽

10.3390/ma13081821 ◽

2020 ◽

Vol 13 (8) ◽

pp. 1821 ◽

Cited By ~ 4

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.

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Experimental Study and Analysis on Strength Properties of Waste Crumb Rubber Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.815.227 ◽

2013 ◽

Vol 815 ◽

pp. 227-232

Author(s):

Jie Dai ◽

Jian Min Xiong ◽

Jin Zhi Zhou

Keyword(s):

Ductile Failure ◽

Crumb Rubber ◽

Strength Properties ◽

Fine Aggregate ◽

Strength Performance ◽

Positive Effects ◽

Four Point Bending ◽

Naoh Solution ◽

Crumb Rubber Concrete ◽

Rubber Concrete

The experiment program was carried out to investigate strength performance and flexural properties of concrete containing recycled crumb rubber. The rubber contents of 10,20,30 and 40% by volume were selected to partially replace the fine aggregate with crumb rubber of 20 mesh, and sodium hydroxide (NaOH) solution was employed to modify the rubber surface, enhancing adhesion between rubber particles and cement paste. Uniaxial compression and four point bending tests showed that both compressive and flexural strength reduced as crumb rubber inclusion increasing. It is notable that surface modification by NaOH solution have positive effects on strength properties of crumb rubber concrete, and the failure mode tends to become ductile failure due to the rubber inclusion rather than brittle failure of normal concrete.

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Influence of Crumb Rubber on Impact Energy of Steel Fiber Concrete Beams

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.802.196 ◽

2015 ◽

Vol 802 ◽

pp. 196-201

Author(s):

Ahmed Tareq Noaman ◽

Badorul Hisham Abu Bakar ◽

Hazizan Md. Akil

Keyword(s):

Impact Energy ◽

Steel Fiber ◽

Concrete Beams ◽

Impact Load ◽

Crumb Rubber ◽

Fine Aggregate ◽

Low Velocity ◽

Fiber Concrete ◽

Steel Fiber Concrete ◽

The Impact

This paper presents the impact energy of steel fiber concrete beams at first crack and failure with different replacement ratios of crumb rubber. The test was carried out using simple low velocity drop weight test rig for both normal concrete (NC) and steel fiber concrete (SFC). The crumb rubber with particle size of 1 – 2 mm was added with replacement ratios of 5%, 15%, and 25% by volume of fine aggregate. Six batches consisting of 6 beams (100x100x500 mm) containing 0.5% of hooked end steel fibers were tested under impact load in accordance with ACI Committee 544. The specimens were tested at the age 90 days after curing in water. The results show a reduction in the compressive strength for both NC and SFC with the incorporation of crumb rubber with greater reduction at higher crumb rubber content. However, the measured impact energy for both NC and SFC was foundincreasing with the crumb rubber replacement.

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Determination of Mechanical Properties of Rubberized Concrete in Marine Environment

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b3527.078219 ◽

2019 ◽

Vol 8 (2) ◽

pp. 5761-5765

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Marine Environment ◽

Concrete Specimen ◽

Crumb Rubber ◽

Fine Aggregate ◽

Test Results ◽

Rubberized Concrete ◽

Split Tensile Strength

With an objective of saving the environment by providing crumb rubber as an alternative to natural fine aggregate this paper presents a study carried out to find the mechanical properties of rubberized concrete. Rubberized concrete is made up of waste rubber from vehicle tyres and other rubber waste which otherwise is left out polluting the environment. In this paper, 7.5% of crumb rubber (obtained by shredding the vehicle tyres) as an alternative to fine aggregate and 7.5% of fly-ash as an alternative to cement is added with other ingredients of concrete to produce an eco-friendly concrete which can be used economically and effectively for construction along the coastal areas. Various properties like workability, compressive strength, split tensile strength, and flexural strength was carried out on concrete specimens exposed to the natural marine environment along the coast of Visakhapatnam, Andhra Pradesh. The total exposure of concrete specimen was about 150 days, and various specimens were tested at 7, 28, 90, 120 and 150 days, respectively. The test results showed that with a slight compromise in strength, the workability of concrete and resistance to the effect of seawater on the strength of concrete significantly improved with the addition of crumb rubber and fly-ash.

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Partial Replacement of Fine Aggregate Using Waste Materials in Concrete as Roof Tile: A Review

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1200/1/012008 ◽

2021 ◽

Vol 1200 (1) ◽

pp. 012008

Author(s):

K Supar ◽

F A A Rani ◽

N L Mazlan ◽

M K Musa

Keyword(s):

Water Absorption ◽

Crumb Rubber ◽

Waste Material ◽

Waste Materials ◽

Partial Replacement ◽

Fine Aggregate ◽

Coconut Fiber ◽

Roof Tile ◽

Fine Aggregates ◽

Stone Dust

Abstract The use of waste material as a partial replacement has become popular in concrete mixture studies. Many research has utilized waste materials like cement, fine aggregate, coarse aggregate, and reinforcing materials substitute. The current paper focuses on some of the waste elements that are utilized in a concrete mortar (use in roof tile) as a partial replacement for fine aggregates such as rubber ash, sawdust, seashells, crumb rubber, pistachio shells, cinder sand, stone dust, and copper slag. There are many variations of mix proportion and water-cement ratio for every waste material. Compressive strength was compared and found that stone dust and the combination of seashell and coconut fiber shows an incensement when used to replacing fine aggregate. The suitable replacement level for stone dust is 25% and 50%. While the suitable replacement levels for the combination of sea shell and coconut fiber are 20% and 30%. Material from the rubber families such as rubber crumb and rubber ash is only suitable for replacement levels. Rubber families especially rubber crumbs have shown low water absorption value which is good in the production of roofing products. As we know, the roof should have waterproof properties to prevent any leaks from happening when it rains. Most of the waste materials added as fine aggregates in concrete have increased the amount of water absorption and found that sawdust is the most abundant material with a high percentage of water absorption compared to the others. Research on the partial replacement of fine aggregates replaced with waste materials is needed more extensively to provide more confidence about their use in concrete mortars, especially on roof tiles.

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Utilization of Waste Rubber Tyres as an Ingredient in Concrete Mixes.

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.e2177.039520 ◽

2020 ◽

Vol 9 (5) ◽

pp. 149-154

Keyword(s):

Construction Industry ◽

Research Work ◽

Impact Resistance ◽

Crumb Rubber ◽

Waste Material ◽

Fine Aggregate ◽

Split Tensile Strength ◽

Volume Variation ◽

Waste Tyres ◽

Materials Used

Improvements in materials used for construction have an important impact on the Construction industry. Therefore many efforts have been made in the construction industry to put to use waste material products, e.g., worn-out tyres, into useful and Economical items. If this is achieved successfully it will contribute to the reduced quantity of waste material dumping problems by effective use of these waste materials in the building sector. The present research will concentrate on how to effectively put to use the rubber waste tyres in construction industry so as to reduce their impact on our precious environment and also using them effectively in the construction process. It will involve comprehensive laboratory tests on fresh and hardened rubberized concrete in order to study its strength behavior i.e. compressive and flexure strength, and its impact resistance with different volume of rubber in crumb state (fine aggregate). Volume variation of crumb rubber. The proposed research work will study the effect of volume variation of crumb rubber on the compressive strength, flexural strength, split tensile strength & workability in terms of Slump in mm of the concrete.

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Effect of Curing Methods on Carbonation Depth of Rubberised Fibre Mortar

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.802.124 ◽

2015 ◽

Vol 802 ◽

pp. 124-129

Author(s):

Mukaddas Ahmad Musa ◽

Farah Nora Aznieta Abdul Aziz ◽

Noor Azline Mohd Nasir

Keyword(s):

Oil Palm ◽

Crumb Rubber ◽

Partial Replacement ◽

Fine Aggregate ◽

Carbonation Depth ◽

Palm Fruit ◽

Cement Ratio ◽

Depth Measurement ◽

Major Threat ◽

Curing Methods

In Malaysia, more than 50,000 tons of used automobile tyres are stockpiled annually. This subsequently causes a major threat to the environment. This article focus on the durability of mortar with treated crumb rubber (TCR) as partial replacement for fine aggregate (FA) and addition of oil palm fruit fibre (OPFF) in the mix. For every 0.5% OPFF additions, there were 10% TCR replacements up to 30%, resulting in 16 different mixes with constant water cement ratio. The specimens were cured either by water ponding or water sprinkling for 28 days, after which they were preconditioned and subsequent carbonation depth measurement was made. The results showed that the carbonation depth lies between 2.5mm to 6.7mm. These confirmed that rubberised fibre mortar achieved carbonation depth of less than 15mm, the tolerable limit.

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