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Wang, Peng
- Mechanical Properties of Fly Ash Concrete Composite Reinforced with Nano-SiO2 and Steel Fibre
Abstract Views :218 |
PDF Views:89
Authors
Affiliations
1 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
1 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
Source
Current Science, Vol 106, No 11 (2014), Pagination: 1529-1537Abstract
A parametric experimental study has been conducted to study the effect of nano-SiO2 particles and steel fibres on the mechanical properties of the concrete composite containing fly ash. Five different nano-SiO2 contents (1%, 3%, 5%, 7% and 9%) and five different steel fibre contents (0.5%, 1%, 1.5%, 2% and 2.5%) were used. The results indicate that addition of nano- SiO2 and steel fibres decreases the slump and slump flow of the fresh concrete composite containing fly ash, and both the slump and slump flow decrease gradually with the increase in nano-SiO2 and steel fibre content. The addition of nano-SiO2 improves the mechanical properties of concrete composites containing fly ash. There is an increase in the compressive strength and compressive modulus of elasticity with increase of nano-SiO2 content when it is below 5%, while they begin to decrease after the nano-SiO2 content is beyond 5%. Steel fibres help improve the mechanical properties of concrete composite containing fly ash and nano-particles. With the appropriate fibre content, the reinforcement of steel fibres on the compressive strength and compressive modulus of elasticity of the concrete composite becomes more obvious as the fibre content increases.Keywords
Fly Ash, Concrete Composite, Mechanical Property, Nano-SiO2, Steel Fibre.Full Text
- Fracture Properties of Steel Fibre Reinforced High-Performance Concrete Containing Nano-SiO2 and Fly Ash
Abstract Views :273 |
PDF Views:90
Authors
Affiliations
1 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
1 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
Source
Current Science, Vol 106, No 7 (2014), Pagination: 980-987Abstract
In this article, we study the effect of steel fibre on the fracture properties of high performance concrete (HPC) containing fly ash and nano-SiO2. The results reveal that the addition of appropriate content of steel fibre helps improve the fracture properties of HPC. Steel fibre improves the fracture parameters of initial fracture toughness, unstable fracture toughness, fracture energy and critical crack opening displacement of the beam specimen of HPC. The results also show that steel fibre has major effect on the fracture curves of the three-point bending beam specimen. The fracture toughness and fracture energy increase gradually, and the area under the fracture relational curve becomes larger when the steel fibre content increases from 0.5% to 2%. However, these fracture parameters begin to decrease and the area under the fracture relational curve becomes smaller when the steel fibre content exceeds 2%. This indicates that steel fibre helps improve the fracture properties of HPC containing nano-SiO2 and fly ash only when its fibre content does not exceed 2%.Keywords
Fly Ash, Fracture Properties, High Performance Concrete, Nano-SiO2, Steel Fibre.Full Text
- Effect of Nano-SiO2 Particles on Fracture Properties of Concrete Composite Containing Fly Ash
Abstract Views :227 |
PDF Views:126
Authors
Affiliations
1 Open Laboratory of Water Conservancy and Science of Key Disciplines in Henan Province, Zhengzhou University, Zhengzhou 450001, CN
2 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
1 Open Laboratory of Water Conservancy and Science of Key Disciplines in Henan Province, Zhengzhou University, Zhengzhou 450001, CN
2 School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou 450001, CN
Source
Current Science, Vol 108, No 11 (2015), Pagination: 2035-2043Abstract
A parametric experimental study has been conducted to investigate the effect of nano-SiO2 particles on fracture properties of concrete composite containing fly ash. Five different nano-SiO2 contents were used for this study. By means of three-point bending method, the fracture parameters of the effective crack length, initial fracture toughness, unstable fracture toughness, fracture energy, critical crack opening displacement, maximum crack opening displacement and maximum mid-span deflection of the beam specimen were measured. The results reveal that the addition of lower SiO2 content (<5%) nano-particles may help improve the fracture properties of concrete composite containing fly ash. Nano-SiO2 has a significant effect on the fracture relational curves of the three-point bending beam specimen. The fracture parameters increase gradually and the fracture relational curves become thicker as the nano-SiO2 content increases from 0% to 5%. However, the fracture parameters begin to decrease and the curves become thinner when the nano-SiO2 content exceeds 5%. These variation rules of fracture parameters and fracture relational curves indicate that nano-SiO2 contributes significantly to the improvement of fracture properties of concrete composite containing fly ash only when its content does not exceed 5%.Keywords
Three-Point Bending Method, Fracture Properties, Fly Ash Concrete, Nano-SiO2.Full Text
- A Bibliometric Profile of Current Science between 1961 and 2015
Abstract Views :301 |
PDF Views:79
Authors
Affiliations
1 Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, CN
2 Research Center of Science Technology and Society, Dalian University, Dalian Economic Technological Development Zone, Dalian City, Liaoning Province, CN
1 Dalian University of Technology, No. 2 Linggong Road, Ganjingzi District, Dalian City, Liaoning Province, CN
2 Research Center of Science Technology and Society, Dalian University, Dalian Economic Technological Development Zone, Dalian City, Liaoning Province, CN
Source
Current Science, Vol 113, No 03 (2017), Pagination: 386-392Abstract
A bibliometric analysis of 31,403 publications in Current Science between 1961 and 2015 revealed an unstable trend; the highest citations per publication appeared during 2003-2005. The impact factor of Current Science had an overall increasing trend and placed the journal in the quartile Q2 within 'Multidisciplinary sciences' category. The h-index of Current Science was 82 and 24 authors had more than one H-Classic articles. The most productive country was India and Current Science was dominated by contributions from Indian institutions. Analysis of author keywords showed 11 main research themes for the journal. These findings will help the readers to get a quick and intuitive overview of Current Science.Keywords
Bibliometrics, Citation Impact, Current Science, Research Theme, Scientific Journals Evaluation.Full Text
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