Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios
The effects of the addition of different nanosilica dosages (0.5%, 1%, and 1.5% with respect to cement) on compressive strength and durability properties of concrete with water/binder ratios 0.65, 0.55, and 0.5 were investigated. Water sorptivity, apparent chloride diffusion coefficient, electrical...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/8453567 |
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| author | Forood Torabian Isfahani Elena Redaelli Federica Lollini Weiwen Li Luca Bertolini |
| author_facet | Forood Torabian Isfahani Elena Redaelli Federica Lollini Weiwen Li Luca Bertolini |
| author_sort | Forood Torabian Isfahani |
| collection | DOAJ |
| description | The effects of the addition of different nanosilica dosages (0.5%, 1%, and 1.5% with respect to cement) on compressive strength and durability properties of concrete with water/binder ratios 0.65, 0.55, and 0.5 were investigated. Water sorptivity, apparent chloride diffusion coefficient, electrical resistivity, and carbonation coefficient of concrete were measured. The results showed that compressive strength significantly improved in case of water/binder = 0.65, while for water/binder = 0.5 no change was found. Increasing nanosilica content, the water sorptivity decreased only for water/binder = 0.55. The addition of 0.5% nanosilica decreased the apparent chloride diffusion coefficient for water/binder = 0.65 and 0.55; however, higher nanosilica dosages did not decrease it with respect to reference value. The resistivity was elevated by 0.5% nanosilica for all water/binder ratios and by 1.5% nanosilica only for water/binder = 0.5. The carbonation coefficient was not notably affected by increasing nanosilica dosages and even adverse effect was observed for water/binder = 0.65. Further information of microstructure was also provided through characterization techniques such as X-ray diffraction, thermal gravimetric analysis, mercury intrusion porosimetry, and scanning electron microscopy. The effectiveness of a certain nanosilica dosage addition into lower strength mixes was more noticeable, while, for the higher strength mix, the effectiveness was less. |
| format | Article |
| id | doaj-art-62b5235244da4acf8162ad9f347cb37a |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-62b5235244da4acf8162ad9f347cb37a2025-02-03T01:31:11ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/84535678453567Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder RatiosForood Torabian Isfahani0Elena Redaelli1Federica Lollini2Weiwen Li3Luca Bertolini4Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, ItalyDepartment of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, ItalyDepartment of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, ItalyCollege of Civil Engineering, Shenzhen University, Nanshan, Shenzhen 518060, ChinaDepartment of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, ItalyThe effects of the addition of different nanosilica dosages (0.5%, 1%, and 1.5% with respect to cement) on compressive strength and durability properties of concrete with water/binder ratios 0.65, 0.55, and 0.5 were investigated. Water sorptivity, apparent chloride diffusion coefficient, electrical resistivity, and carbonation coefficient of concrete were measured. The results showed that compressive strength significantly improved in case of water/binder = 0.65, while for water/binder = 0.5 no change was found. Increasing nanosilica content, the water sorptivity decreased only for water/binder = 0.55. The addition of 0.5% nanosilica decreased the apparent chloride diffusion coefficient for water/binder = 0.65 and 0.55; however, higher nanosilica dosages did not decrease it with respect to reference value. The resistivity was elevated by 0.5% nanosilica for all water/binder ratios and by 1.5% nanosilica only for water/binder = 0.5. The carbonation coefficient was not notably affected by increasing nanosilica dosages and even adverse effect was observed for water/binder = 0.65. Further information of microstructure was also provided through characterization techniques such as X-ray diffraction, thermal gravimetric analysis, mercury intrusion porosimetry, and scanning electron microscopy. The effectiveness of a certain nanosilica dosage addition into lower strength mixes was more noticeable, while, for the higher strength mix, the effectiveness was less.http://dx.doi.org/10.1155/2016/8453567 |
| spellingShingle | Forood Torabian Isfahani Elena Redaelli Federica Lollini Weiwen Li Luca Bertolini Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios Advances in Materials Science and Engineering |
| title | Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios |
| title_full | Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios |
| title_fullStr | Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios |
| title_full_unstemmed | Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios |
| title_short | Effects of Nanosilica on Compressive Strength and Durability Properties of Concrete with Different Water to Binder Ratios |
| title_sort | effects of nanosilica on compressive strength and durability properties of concrete with different water to binder ratios |
| url | http://dx.doi.org/10.1155/2016/8453567 |
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