Axial stress-strain behavior of macro-synthetic fiber reinforced recycled aggregate concrete

2019 ◽  
Vol 97 ◽  
pp. 341-356 ◽  
Author(s):  
Syed Minhaj Saleem Kazmi ◽  
Muhammad Junaid Munir ◽  
Yu-Fei Wu ◽  
Indubhushan Patnaikuni ◽  
Yingwu Zhou ◽  
...  
Keyword(s):  
Axial Stress ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Synthetic Fiber ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Strain Behavior

Compressive stress–strain behavior of steel fiber reinforced-recycled aggregate concrete

2014 ◽  
Vol 46 ◽  
pp. 65-72 ◽  
Author(s):  
Jodilson Amorim Carneiro ◽  
Paulo Roberto Lopes Lima ◽  
Mônica Batista Leite ◽  
Romildo Dias Toledo Filho
Keyword(s):  
Compressive Stress ◽  
Steel Fiber ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Fiber Reinforced ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Strain Behavior

Development of a unified model to predict the axial stress–strain behavior of recycled aggregate concrete confined through spiral reinforcement

2020 ◽  
Vol 218 ◽  
pp. 110851 ◽  
Author(s):  
Muhammad Junaid Munir ◽  
Syed Minhaj Saleem Kazmi ◽  
Yu-Fei Wu ◽  
Indubhushan Patnaikuni ◽  
Junfeng Wang ◽  
...  
Keyword(s):  
Axial Stress ◽  
Unified Model ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Strain Behavior

scholarly journals Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres

2021 ◽  
Vol 13 (10) ◽  
pp. 5741
Author(s):  
Muhammad Junaid Munir ◽  
Syed Minhaj Saleem Kazmi ◽  
Yu-Fei Wu ◽  
Xiaoshan Lin ◽  
Muhammad Riaz Ahmad
Keyword(s):  
Axial Stress ◽  
Peak Stress ◽  
Polypropylene Fibre ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Peak Strain ◽  
Stress Strain ◽  
Polypropylene Fibres ◽  
Aggregate Concrete

The addition of macro-polypropylene fibres improves the stress-strain performance of natural aggregate concrete (NAC). However, limited studies focus on the stress-strain performance of macro-polypropylene fibre-reinforced recycled aggregate concrete (RAC). Considering the variability of coarse recycled aggregates (CRA), more studies are needed to investigate the stress-strain performance of macro-polypropylene fibre-reinforced RAC. In this study, a new type of 48 mm long BarChip macro-polypropylene fibre with a continuously embossed surface texture is used to produce BarChip fibre-reinforced NAC (BFNAC) and RAC (BFRAC). The stress-strain performance of BFNAC and BFRAC is studied for varying dosages of BarChip fibres. Results show that the increase in energy dissipation capacity (i.e., area under the curve), peak stress, and peak strain of samples is observed with an increase in fibre dosage, indicating the positive effect of fibre addition on the stress-strain performance of concrete. The strength enhancement due to the addition of fibres is higher for BFRAC samples than BFNAC samples. The reduction in peak stress, ultimate strain, toughness and specific toughness of concrete samples due to the utilisation of CRA also reduces with the addition of fibres. Hence, the negative effect of CRA on the properties of concrete samples can be minimised by adding BarChip macro-polypropylene fibres. The applicability of the stress-strain model previously developed for macro-synthetic and steel fibre-reinforced NAC and RAC to BFNAC and BFRAC is also examined.

Stress-strain behavior of spirally confined recycled aggregate concrete: An approach towards sustainable design

2019 ◽  
Vol 146 ◽  
pp. 127-139 ◽  
Author(s):  
Muhammad Junaid Munir ◽  
Yu-Fei Wu ◽  
Syed Minhaj Saleem Kazmi ◽  
Indubhushan Patnaikuni ◽  
Yingwu Zhou ◽  
...  
Keyword(s):  
Sustainable Design ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Strain Behavior

scholarly journals Research on the Mechanical Properties of Recycled Aggregate Concrete under Uniaxial Compression Based on the Statistical Damage Model

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3765
Author(s):  
Weifeng Bai ◽  
Wenhao Li ◽  
Junfeng Guan ◽  
Jianyou Wang ◽  
Chenyang Yuan
Keyword(s):  
Uniaxial Compression ◽  
Recycled Aggregate Concrete ◽  
Local Failure ◽  
Recycled Aggregate ◽  
Replacement Rate ◽  
Stress Strain ◽  
Aggregate Concrete ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Strain Behavior

In this paper, uniaxial compression tests were carried out for recycled aggregate concrete with water cement ratios of 0.38, 0.49, and 0.66 and replacement ratios of 0%, 25%, 50%, 75%, and 100%, respectively. The influence of the replacement ratio of recycled aggregate and water cement ratio on the strength, elastic modulus, and deformation characteristics of concrete was discussed. The results show that the replacement rate of recycled aggregate has a significant effect on the macro stress–strain behavior of concrete. In the case of a constant water cement ratio, the peak nominal stress first decreases and then increases with the increase of the replacement rate; while the water cement ratios equal 0.38, 0.49, and 0.66, the corresponding transition states are 25%, 50%, and 50% of the replacement rate, respectively. The deformation and failure is characterized by two stages: distributed damage and local failure. Combined with the statistical damage mechanics, the influence of the aggregate replacement rate on the damage evolution mechanism of recycled concrete on a mesoscopic scale was explored. Two mesoscopic damage modes, fracture and yield, are considered. Their cumulative evolutions are assumed to follow triangular probability distributions, which could be characterized by four parameters. The peak nominal stress state and the critical state are distinguished, and the latter is defined as a precursor to local failure. With the increase of the replacement rate of recycled aggregate, the inhomogeneous evolution of mesoscopic damage shows obvious regular change, which is consistent with the internal chemical and physical mechanism and macro nonlinear stress–strain behavior.

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