Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials
Concrete with porous hydrophilic properties is easily attacked by corrosive ions, which seriously affects the durability of concrete structures. The incorporation of hydrophobic powder is beneficial to the durability of cementitious materials, but will reduce the mechanical properties. Based on this...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029594 |
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| author | Kangjie Zhang Weizhun Jin Yajun Lv Shuguang Li Xianlei Zhang Tengfei Xiang Changkuan Gu Weifeng Bai Caihong Song Jun Zhao |
| author_facet | Kangjie Zhang Weizhun Jin Yajun Lv Shuguang Li Xianlei Zhang Tengfei Xiang Changkuan Gu Weifeng Bai Caihong Song Jun Zhao |
| author_sort | Kangjie Zhang |
| collection | DOAJ |
| description | Concrete with porous hydrophilic properties is easily attacked by corrosive ions, which seriously affects the durability of concrete structures. The incorporation of hydrophobic powder is beneficial to the durability of cementitious materials, but will reduce the mechanical properties. Based on this, the effects of silica fume (SF), nano silica (NS), and nano calcium carbonate (NC) on the improvement of mechanical properties, hydrophobic, and corrosion resistance of methylsiloxan-based hydrophobic powder (MSHP) modified mortar were studied, and the hydration products, micromorphology, and pore structure of mortar were also characterized. The results show that the addition of MSHP can prolong the setting time of mortar, while micro-nano supplementary cementitious materials can shorten the setting time. The addition of NS helps to increase the compressive strength of mortar, and the compressive strength at 28 d increases by 9.4%, up to 60.4 MPa. Meanwhile, the addition of NC and SF helps to increase the compressive strength at early stage, but not conducive to the improvement of compressive strength at later stage. When 4% MSHP is added, the mortar mixed without supplementary cementitious materials and with SF and NS have superhydrophobic performance, and the water contact angle reaches 150.7°, 151.7°, and 152.4°, respectively, while the mortar mixed with NC cannot obtain the superhydrophobic performance and the water contact angle is only 139.7°. MSHP can significantly improve the corrosion resistance of mortar and the addition of SF and NS can further enhance this performance, while the addition of NC is not conducive to the improvement of corrosion resistance. |
| format | Article |
| id | doaj-art-581f65fff5db4b2598171186d1a66719 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-581f65fff5db4b2598171186d1a667192025-01-19T06:25:39ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013416541670Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materialsKangjie Zhang0Weizhun Jin1Yajun Lv2Shuguang Li3Xianlei Zhang4Tengfei Xiang5Changkuan Gu6Weifeng Bai7Caihong Song8Jun Zhao9School of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaSchool of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaSchool of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaState Key Laboratory of Watershed Water Cycle Simulation and Regulation, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; Corresponding author.School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaSchool of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, ChinaHenan Yudong Water Conservancy Guarantee Center, Kaifeng, Henan, 475000, ChinaSchool of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaSchool of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450046, ChinaSchool of Architecture, North China University of Water Resources and Electric Power, Zhengzhou, 450046, China; Corresponding author.Concrete with porous hydrophilic properties is easily attacked by corrosive ions, which seriously affects the durability of concrete structures. The incorporation of hydrophobic powder is beneficial to the durability of cementitious materials, but will reduce the mechanical properties. Based on this, the effects of silica fume (SF), nano silica (NS), and nano calcium carbonate (NC) on the improvement of mechanical properties, hydrophobic, and corrosion resistance of methylsiloxan-based hydrophobic powder (MSHP) modified mortar were studied, and the hydration products, micromorphology, and pore structure of mortar were also characterized. The results show that the addition of MSHP can prolong the setting time of mortar, while micro-nano supplementary cementitious materials can shorten the setting time. The addition of NS helps to increase the compressive strength of mortar, and the compressive strength at 28 d increases by 9.4%, up to 60.4 MPa. Meanwhile, the addition of NC and SF helps to increase the compressive strength at early stage, but not conducive to the improvement of compressive strength at later stage. When 4% MSHP is added, the mortar mixed without supplementary cementitious materials and with SF and NS have superhydrophobic performance, and the water contact angle reaches 150.7°, 151.7°, and 152.4°, respectively, while the mortar mixed with NC cannot obtain the superhydrophobic performance and the water contact angle is only 139.7°. MSHP can significantly improve the corrosion resistance of mortar and the addition of SF and NS can further enhance this performance, while the addition of NC is not conducive to the improvement of corrosion resistance.http://www.sciencedirect.com/science/article/pii/S2238785424029594Methylsiloxan-based hydrophobic mortarMicro-nano supplementary cementitious materialsMechanical strengthWater contact angleCorrosion resistance |
| spellingShingle | Kangjie Zhang Weizhun Jin Yajun Lv Shuguang Li Xianlei Zhang Tengfei Xiang Changkuan Gu Weifeng Bai Caihong Song Jun Zhao Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials Journal of Materials Research and Technology Methylsiloxan-based hydrophobic mortar Micro-nano supplementary cementitious materials Mechanical strength Water contact angle Corrosion resistance |
| title | Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials |
| title_full | Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials |
| title_fullStr | Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials |
| title_full_unstemmed | Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials |
| title_short | Study on mechanical, hydrophobic and corrosion resistant properties of methylsiloxan-based mortar modified by micro-nano supplementary cementitious materials |
| title_sort | study on mechanical hydrophobic and corrosion resistant properties of methylsiloxan based mortar modified by micro nano supplementary cementitious materials |
| topic | Methylsiloxan-based hydrophobic mortar Micro-nano supplementary cementitious materials Mechanical strength Water contact angle Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029594 |
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