scholarly journals Mechanical Properties of Steel Fibers and Nanosilica Modified Crumb Rubber Concrete

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Yihong Wang ◽  
Jiawei Chen ◽  
Danying Gao ◽  
E. Huang
Keyword(s):  
Mechanical Properties ◽  
Steel Fiber ◽  
Crumb Rubber ◽  
Steel Fibers ◽  
Test Results ◽  
Environment Friendly ◽  
Modified Method ◽  
Concrete Mixtures ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

Crumb rubber concrete (CRC) is an environment-friendly material using crumb rubber as a composition of cement concrete. It provides an alternative method for recycling of waste tires scientifically. CRC exhibits numerous advantages compared to ordinary concrete. However, the application of CRC is limited due to its low compressive and tensile strengths. This paper puts forward a new modified method by adding steel fibers and nanosilica in CRC. Material properties’ testing of eighteen concrete mixtures was investigated, considering different strength grades of CRC and crumb rubber contents. In addition, four different steel fiber contents (0%, 0.5%, 1.0%, and 1.5%) and three different nanosilica content (0%, 1%, and 2%) were taken into consideration. The brittle failure of the CRC can be improved and the mechanical properties can be enhanced according to the test results. More importantly, the modified CRC with 1.0% steel fiber content has relatively high compressive and splitting tensile strengths. Furthermore, the noncompactness of CRC can be effectively improved by nanosilica, enhancing the efficiency of steel fibers simultaneously. Finally, the failure mechanism of the modified CRC is discussed in this paper.

scholarly journals Analysis and Prediction of Compressive Properties for Steel Fiber-and-Nanosilica-Reinforced Crumb Rubber Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Danying Gao ◽  
Tao Zhang ◽  
Yihong Wang ◽  
Yiming Kong ◽  
Dawei Li ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Volume Content ◽  
Steel Fiber ◽  
Crumb Rubber ◽  
Steel Fibers ◽  
Peak Strain ◽  
Compressive Properties ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

The disposal of waste tire rubber has gained more attention from the viewpoint of green, environmental protection, and sustainability. Numerous attempts have been stated on the properties of crumb rubber concrete (CRC) and observed that there is a large reduction of compressive strength and elastic modulus of CRC with the increase of the rubber substitution rate. Based on the CRC with the crumb rubber volume content of 5%, the steel fibers and nanosilica were added to CRC to make steel fiber-and-nanosilica-reinforced crumb rubber concrete (SFNS-CRC) in this paper. The effects of the steel fiber volume content and nanosilica content on the compressive properties of SFNS-CRC were studied, including compressive strength, elastic modulus, peak strain, compression toughness, and failure pattern. The test results indicated that the modulus of elasticity and compressive strength of SFNS-CRC have the increasing tendency with the addition of steel fibers and nanosilica. Moreover, the peak strains have a significant increase with the increase of the steel fiber content and nanosilica replacement ratio. The compressive stress-strain curves of SFNS-CRC gradually plump with the increase of the steel fibers and nanosilica. Finally, the prediction formulas for the compressive strength, elastic modulus, and peak strain of SFNS-CRC were set up. A simple predicted model of the stress-strain curve for SFNS-CRC was proposed, which considers the effect of steel fibers and nanosilica.

Mechanical Properties of Crumb Rubber Concrete

2014 ◽  
Vol 936 ◽  
pp. 1442-1445
Author(s):  
Jun Cai
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Crumb Rubber ◽  
Splitting Tensile Strength ◽  
Test Results ◽  
Flexural Toughness ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

This paper presents the results of a study on mechanical properties of crumb rubber concrete (CRC). The compressive strength, splitting tensile strength and flexural toughness of CRC were investigated. The effect of crumb rubber proportion on the mechanical properties was experimentally analyzed. The test results indicate that the addition of crumb rubber can significantly improve the ductility and flexural toughness of CRC.

Experimental Study on the Mechanical Properties of the Crumb Rubber Concrete Modified by Latex

2014 ◽  
Vol 941-944 ◽  
pp. 739-742
Author(s):  
Wei Li ◽  
Zhen Huang ◽  
Xiao Chu Wang ◽  
Jian Peng Zhang
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Test Results ◽  
Rubber Latex ◽  
Rubber Surface ◽  
Adhesive Ability ◽  
Styrene Butadiene ◽  
Rubber Concrete ◽  
Latex Rubber

Through modification of the rubber surface, the adhesive ability of rubber particles and cement based materials has increased, thus improving the mechanical properties of rubber concrete. Dosage of styrene butadiene latex was studied under the condition of 5% cement quality, the change regularity of different amount of rubber latex rubber modified concrete compressive, splitting, flexural strength and other mechanical properties. The test results prove that the latex rubber mixing can improve compressive, splitting and flexural strength of concrete.

Experimental Study on the Mechanical Properties of the Crumb Rubber Concrete

2013 ◽  
Vol 645 ◽  
pp. 172-175
Author(s):  
Wei Li ◽  
Xiao Chu Wang ◽  
Jun Wei Wang ◽  
Chuan Ji Wang
Keyword(s):  
Mechanical Properties ◽  
Deformation Property ◽  
Plain Concrete ◽  
Crumb Rubber ◽  
Ordinary Concrete ◽  
Testing Method ◽  
Fine Aggregates ◽  
Crumb Rubber Concrete ◽  
Tensile Splitting Strength ◽  
Rubber Concrete

The mechanical properties of concrete with composition of scrapped rubber tyre crumb replacing part of the fine aggregates were investigated. The testing method of the mechanical properties was executed according to . Many groups of crumb rubber concrete specimens are manufactured in different kinds of size and amount of rubber chips. The powder rubber and crumb rubber were mixed into C35 plain concrete, by the volume rations of 0%, 20%, 40 %, 60%, 80% and 100% of the fine aggregates, to investigate the influence of size and amount of rubber chips on the mechanical properties. The results of test indicate: the cubic compression strength, the tensile splitting strength and the strength of rupture decreased with the increase of rubber admixture. But there are some remarkable properties which is difficult to attain on ordinary concrete, such as better cracking resistance, better deformation property, minor density and so on.

scholarly journals Mechanical properties and durability of crumb rubber concrete

2017 ◽  
Vol 236 ◽  
pp. 012093 ◽  
Author(s):  
Roman Chylík ◽  
Tomáš Trtík ◽  
Josef Fládr ◽  
Petr Bílý
Keyword(s):  
Mechanical Properties ◽  
Crumb Rubber ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

Experimental Study on the Mechanical Properties of the Crumb Rubber Concrete Modified by Silica Fume

2014 ◽  
Vol 543-547 ◽  
pp. 4031-4034 ◽  
Author(s):  
Wei Li ◽  
Zhen Huang ◽  
Xiao Chu Wang ◽  
Zi Sheng Zang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Silica Fume ◽  
Mechanism Of Action ◽  
Crumb Rubber ◽  
Experimental Result ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete ◽  
The Way

For researching the way of modified and mechanism of action of the Crumb Rubber Concrete,we had researched the change regulation of Mechanical Properties and compressive strengthsplitting tensile strengthflexural strength of the Crumb Rubber Concrete Modified By Silica Fume with various quantity of rubber,in the condition of 10% silica fume.the experimental result make it clear that silica fume is propitious to heighten compressive strengthsplitting tensile strengthflexural strength of the Crumb Rubber Concrete,and compressive strengthsplitting tensile strengthflexural strength would be cut down when mix the Crumb rubber in Concrete.

AN INVESTIGATION INTO THE TECHNIQUES FOR IMPROVING THE PROPERTIES OF CRUMB RUBBER CONCRETE

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Stephanie Somerville ◽  
Remadevi Dhanasekar ◽  
Travis Frame ◽  
T.G. Suntharavadivel
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Motor Vehicle ◽  
Crumb Rubber ◽  
Test Results ◽  
Concrete Mix ◽  
Hardened Properties ◽  
Recycled Rubber ◽  
Materials Used ◽  
Rubber Concrete

Motor vehicle tires are discarded every year where the majority ends up in land fill. This poses a serious ecological threat as the tires contain many toxic components and contribute to a loss of biodiversity. From the economic and environmental perspectives, inclusion of recycled rubber in concrete would reduce costs as well as conserve the component materials used in concrete. Past studies have indicated poor-mechanical properties of concrete with the sole inclusion of recycled tire rubber. This paper presents an experimental investigation to improve the workability and hardened properties through sodium hydroxide surface treatment of recycled crumb rubber, and silica fume. Ten concrete mixes were prepared with the volumes of recycled rubber ranging from 10% to 30%. The test results were compared with a control concrete mix. The investigation indicated that favorable strength could be achieved with the addition of 10% treated rubber. Test results and analysis details are presented in the paper.

Analysis of Mechanical Performance of Crumb Rubber Concrete by Different Aggregate Shape under Uniaxial Compression on Mesoscopic

2011 ◽  
Vol 462-463 ◽  
pp. 219-222 ◽  
Author(s):  
Gen Quan Zhong ◽  
Yong Chang Guo ◽  
Li Juan Li ◽  
Feng Liu
Keyword(s):  
Mechanical Properties ◽  
Uniaxial Compression ◽  
Crumb Rubber ◽  
Aggregate Model ◽  
Stress Strain ◽  
Random Aggregate ◽  
Random Aggregate Model ◽  
Crumb Rubber Concrete ◽  
Aggregate Shape ◽  
Rubber Concrete

From micro perspective, crumb rubber concrete (CRC) is viewed as a composite consisting of mortar matrix, aggregates and rubber particle. In this paper, based on random aggregate model with different aggregate shape in planar, the mechanical properties of CRC using linear Mohr-coulomb constitutive relation are studied by nonlinear finite element method under uniaxial compression on mesoscopic. The number of random aggregates is calculated in two-dimension by Walraven formula. Circular random aggregate model, elliptic random aggregate model and polygonal random aggregate model are established. Stress-strain curves under varieties of conditions are derived and compared with the test results. The results show that the simulative stress-strain curve fit the reality very much. In the numerical analysis, the aggregate shape has little effect on the mechanical properties of CRC.

scholarly journals Compressive Behavior and Mechanical Characteristics and Their Application to Stress-Strain Relationship of Steel Fiber-Reinforced Reactive Powder Concrete

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Baek-Il Bae ◽  
Hyun-Ki Choi ◽  
Bong-Seop Lee ◽  
Chang-Hoon Bang
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
Steel Fiber ◽  
High Strength ◽  
Steel Fibers ◽  
Reactive Powder Concrete ◽  
Test Results ◽  
Strength Concrete ◽  
Estimation Equations ◽  
Reactive Powder

Although mechanical properties of concrete under uniaxial compression are important to design concrete structure, current design codes or other empirical equations have clear limitation on the prediction of mechanical properties. Various types of fiber-reinforced reactive powder concrete matrix were tested for making more usable and accurate estimation equations for mechanical properties for ultra high strength concrete. Investigated matrix has compressive strength ranged from 30 MPa to 200 MPa. Ultra high strength concrete was made by means of reactive powder concrete. Preventing brittle failure of this type of matrix, steel fibers were used. The volume fraction of steel fiber ranged from 0 to 2%. From the test results, steel fibers significantly increase the ductility, strength and stiffness of ultra high strength matrix. They are quantified with previously conducted researches about material properties of concrete under uniaxial loading. Applicability of estimation equations for mechanical properties of concrete was evaluated with test results of this study. From the evaluation, regression analysis was carried out, and new estimation equations were proposed. And these proposed equations were applied into stress-strain relation which was developed by previous research. Ascending part, which was affected by proposed equations of this study directly, well fitted into experimental results.

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