Research on Freeze-thaw Resistance of High-strength Porous Concrete
Because porous concrete is feature with a large pore structure and porosity,the freezing of water enriched in the pores in winter will have a greater impact on the performance of porous concrete.This paper puts forward the test method and evaluation index of the freeze-thaw resistance of porous conc...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Pearl River
2021-01-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.01.009 |
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| author | NIE Qingnian YANG Yongmin LIU Xiaofei LI Haibo LYU Kai |
| author_facet | NIE Qingnian YANG Yongmin LIU Xiaofei LI Haibo LYU Kai |
| author_sort | NIE Qingnian |
| collection | DOAJ |
| description | Because porous concrete is feature with a large pore structure and porosity,the freezing of water enriched in the pores in winter will have a greater impact on the performance of porous concrete.This paper puts forward the test method and evaluation index of the freeze-thaw resistance of porous concrete with reference to those of ordinary concrete,and systematically studies the effect of fly ash,slag,silica fume,fine sand and crack-resistant fiber on the freeze-thaw resistance of porous concrete.The results show that:The compressive strength of the prepared porous concrete is about 30.2~35.6 MPa for 28 days.The addition of fly ash,fine sand and fiber alone has no effect on the freeze-thaw resistance of porous concrete.Silica fume is beneficial to improve the freeze-thaw resistance.After adding 10% silica fume,when the number of cycles reaches 60,the dynamic elastic modulus can reach 66.8%,the mass loss rate is only 0.35%,and the freeze-thaw resistance index is 12.58.The porous concrete contains more connected pores,but it may still be damaged by volume expansion after water freezes.However,after adding silica fume,the freeze-thaw resistance of slurry is improved by increasing the amount of C-S-H gel,enhancing the adhesion between the interface and strengthening the interface. |
| format | Article |
| id | doaj-art-bcb832b215064180ba55477c4cb85197 |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2021-01-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-bcb832b215064180ba55477c4cb851972025-01-15T02:30:41ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352021-01-014247650514Research on Freeze-thaw Resistance of High-strength Porous ConcreteNIE QingnianYANG YongminLIU XiaofeiLI HaiboLYU KaiBecause porous concrete is feature with a large pore structure and porosity,the freezing of water enriched in the pores in winter will have a greater impact on the performance of porous concrete.This paper puts forward the test method and evaluation index of the freeze-thaw resistance of porous concrete with reference to those of ordinary concrete,and systematically studies the effect of fly ash,slag,silica fume,fine sand and crack-resistant fiber on the freeze-thaw resistance of porous concrete.The results show that:The compressive strength of the prepared porous concrete is about 30.2~35.6 MPa for 28 days.The addition of fly ash,fine sand and fiber alone has no effect on the freeze-thaw resistance of porous concrete.Silica fume is beneficial to improve the freeze-thaw resistance.After adding 10% silica fume,when the number of cycles reaches 60,the dynamic elastic modulus can reach 66.8%,the mass loss rate is only 0.35%,and the freeze-thaw resistance index is 12.58.The porous concrete contains more connected pores,but it may still be damaged by volume expansion after water freezes.However,after adding silica fume,the freeze-thaw resistance of slurry is improved by increasing the amount of C-S-H gel,enhancing the adhesion between the interface and strengthening the interface.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.01.009porous concretefreeze-thaw resistancefreeze-thaw resistance index |
| spellingShingle | NIE Qingnian YANG Yongmin LIU Xiaofei LI Haibo LYU Kai Research on Freeze-thaw Resistance of High-strength Porous Concrete Renmin Zhujiang porous concrete freeze-thaw resistance freeze-thaw resistance index |
| title | Research on Freeze-thaw Resistance of High-strength Porous Concrete |
| title_full | Research on Freeze-thaw Resistance of High-strength Porous Concrete |
| title_fullStr | Research on Freeze-thaw Resistance of High-strength Porous Concrete |
| title_full_unstemmed | Research on Freeze-thaw Resistance of High-strength Porous Concrete |
| title_short | Research on Freeze-thaw Resistance of High-strength Porous Concrete |
| title_sort | research on freeze thaw resistance of high strength porous concrete |
| topic | porous concrete freeze-thaw resistance freeze-thaw resistance index |
| url | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.01.009 |
| work_keys_str_mv | AT nieqingnian researchonfreezethawresistanceofhighstrengthporousconcrete AT yangyongmin researchonfreezethawresistanceofhighstrengthporousconcrete AT liuxiaofei researchonfreezethawresistanceofhighstrengthporousconcrete AT lihaibo researchonfreezethawresistanceofhighstrengthporousconcrete AT lyukai researchonfreezethawresistanceofhighstrengthporousconcrete |