Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete
Modified polyester fiber reinforced concrete with different additions was prepared. The dispersivity of modified polyester fibers in concrete by five different mixing methods was studied by an image processing method. With a series of durability tests, the carbonation resistance, chloride penetratio...
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Science Press
2016-11-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.11.014 |
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| author | CHEN Jian-qiang JI Hong-guang LIU Juan-hong YANG Fang |
| author_facet | CHEN Jian-qiang JI Hong-guang LIU Juan-hong YANG Fang |
| author_sort | CHEN Jian-qiang |
| collection | DOAJ |
| description | Modified polyester fiber reinforced concrete with different additions was prepared. The dispersivity of modified polyester fibers in concrete by five different mixing methods was studied by an image processing method. With a series of durability tests, the carbonation resistance, chloride penetration resistance and frost resistance of the fiber reinforced concrete were also investigated. The results indicate that the image processing method can evaluate the dispersivity of the fiber reinforced concrete well. The mixing method of "aggregate and binding materials for 60 s + water for 60 s + fiber for 60 s" makes the best dispersivity of modified polyester fibers. It is in accord with direct observations by naked eyes. The compressive strength is increased by the addition of modified polyester fibers. After adding 1.1 kg·m-3 modified polyester fibers, the compressive strength of concrete increases by 14%; but with more modified polyester fibers, the compressive strength no longer increases. The existence of modified polyester fibers in concrete can slow down the diffusion of CO2, the carbonation rate of concrete decreases by 12.6% to 18.9%, and with more modified polyester fibers, the carbonation resistance became better. After the addition of modified polyester fibers, the chloride diffusion coefficient of concrete also decreases. The modified polyester fibers can reduce the surface spalling of concrete during freeze-thaw cycles, which improves the frost resistance of concrete significantly. |
| format | Article |
| id | doaj-art-a3e0806ef64b4aabb3b7dcf2cb4fbff9 |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2016-11-01 |
| publisher | Science Press |
| record_format | Article |
| series | 工程科学学报 |
| spelling | doaj-art-a3e0806ef64b4aabb3b7dcf2cb4fbff92025-08-20T01:47:51ZzhoScience Press工程科学学报2095-93892016-11-0138111603160910.13374/j.issn2095-9389.2016.11.014Dispersivity of modified polyester fibers in concrete and its influence on the durability of concreteCHEN Jian-qiangJI Hong-guang0LIU Juan-hong1YANG Fang21. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;Modified polyester fiber reinforced concrete with different additions was prepared. The dispersivity of modified polyester fibers in concrete by five different mixing methods was studied by an image processing method. With a series of durability tests, the carbonation resistance, chloride penetration resistance and frost resistance of the fiber reinforced concrete were also investigated. The results indicate that the image processing method can evaluate the dispersivity of the fiber reinforced concrete well. The mixing method of "aggregate and binding materials for 60 s + water for 60 s + fiber for 60 s" makes the best dispersivity of modified polyester fibers. It is in accord with direct observations by naked eyes. The compressive strength is increased by the addition of modified polyester fibers. After adding 1.1 kg·m-3 modified polyester fibers, the compressive strength of concrete increases by 14%; but with more modified polyester fibers, the compressive strength no longer increases. The existence of modified polyester fibers in concrete can slow down the diffusion of CO2, the carbonation rate of concrete decreases by 12.6% to 18.9%, and with more modified polyester fibers, the carbonation resistance became better. After the addition of modified polyester fibers, the chloride diffusion coefficient of concrete also decreases. The modified polyester fibers can reduce the surface spalling of concrete during freeze-thaw cycles, which improves the frost resistance of concrete significantly.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.11.014fiber reinforced concretepolyester fibersdispersivitydurability |
| spellingShingle | CHEN Jian-qiang JI Hong-guang LIU Juan-hong YANG Fang Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete 工程科学学报 fiber reinforced concrete polyester fibers dispersivity durability |
| title | Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| title_full | Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| title_fullStr | Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| title_full_unstemmed | Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| title_short | Dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| title_sort | dispersivity of modified polyester fibers in concrete and its influence on the durability of concrete |
| topic | fiber reinforced concrete polyester fibers dispersivity durability |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2016.11.014 |
| work_keys_str_mv | AT chenjianqiang dispersivityofmodifiedpolyesterfibersinconcreteanditsinfluenceonthedurabilityofconcrete AT jihongguang dispersivityofmodifiedpolyesterfibersinconcreteanditsinfluenceonthedurabilityofconcrete AT liujuanhong dispersivityofmodifiedpolyesterfibersinconcreteanditsinfluenceonthedurabilityofconcrete AT yangfang dispersivityofmodifiedpolyesterfibersinconcreteanditsinfluenceonthedurabilityofconcrete |