Mechanical properties and acoustic emission data analyses of crumb rubber concrete under biaxial compression stress states

2021 ◽  
Vol 298 ◽  
pp. 123778
Author(s):  
Jie Xu ◽  
Xianli Niu ◽  
Ziyi Yao
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Crumb Rubber ◽  
Biaxial Compression ◽  
Compression Stress ◽  
Emission Data ◽  
Data Analyses ◽  
Crumb Rubber Concrete ◽  
Stress States ◽  
Rubber Concrete

Acoustic emission data analyses based on crumb rubber concrete beam bending tests

2019 ◽  
Vol 210 ◽  
pp. 189-202 ◽  
Author(s):  
Qinghua Han ◽  
Guang Yang ◽  
Jie Xu ◽  
Zhengwu Fu ◽  
Giuseppe Lacidogna ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Concrete Beam ◽  
Crumb Rubber ◽  
Emission Data ◽  
Bending Tests ◽  
Data Analyses ◽  
Beam Bending ◽  
Crumb Rubber Concrete ◽  
Rubber 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

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.

Micro-cracking monitoring and fracture evaluation for crumb rubber concrete based on acoustic emission techniques

2017 ◽  
Vol 17 (4) ◽  
pp. 946-958 ◽  
Author(s):  
Jie Xu ◽  
Zhengwu Fu ◽  
Qinghua Han ◽  
Giuseppe Lacidogna ◽  
Alberto Carpinteri
Keyword(s):  
Acoustic Emission ◽  
Evaluation Method ◽  
Early Stage ◽  
Damping Ratio ◽  
Crumb Rubber ◽  
Acoustic Emission Technique ◽  
Statistical Parameters ◽  
Micro Cracks ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

A micro-cracking monitoring and fracture evaluation method for crumb rubber concrete based on the acoustic emission technique was developed. The precursory micro-cracking activity and fracture behavior of crumb rubber concrete with different rubber contents, 0%, 10%, and 15%, were analyzed. The various acoustic emission statistical parameters including cumulative event, frequency distribution, amplitude distribution, and b-value were used for the analysis. The general fracture process is similar for all normal and crumb rubber concretes and can be divided into three distinct stages of micro-crack activity, namely, early stage, main collapse stage, and post-fracture stage. The following conclusions were drawn from the analysis: (1) more micro-cracks initiated and grew at early stage in the normal concrete, while less micro-cracks in the crumb rubber concrete but with longer stage duration; (2) the duration and crack number are both increasing with the increase in the rubber contents in main collapse and post-fracture stages; (3) new crack types associated with the rubber particles were recorded due to the change of the peak frequencies; and (4) the amplitude of the cracks decrease with the increase in the rubber content due to the damping ratio and interface improvement by the mixed rubbers. The results obtained in this article demonstrate that the acoustic emission technique can provide valuable information for a better understanding of micro-cracking and fracture monitoring of crumb 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.

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.

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