Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM)
To solve the problem of waste slag treatment of slurry shields, a reuse scheme in which waste shield mud is used to replace traditional karst cave grouting filling material which is proposed; thus, a new type of underwater cementitious filling material (NWC-FM) is developed. NWC-FM is convenient, in...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/2618478 |
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| author | Yanmei Ruan Xu Luo Shan Lin Xingkai Pei |
| author_facet | Yanmei Ruan Xu Luo Shan Lin Xingkai Pei |
| author_sort | Yanmei Ruan |
| collection | DOAJ |
| description | To solve the problem of waste slag treatment of slurry shields, a reuse scheme in which waste shield mud is used to replace traditional karst cave grouting filling material which is proposed; thus, a new type of underwater cementitious filling material (NWC-FM) is developed. NWC-FM is convenient, inexpensive, and environmentally friendly. Its mix proportion is designed, and its mechanical performance is tested. According to the characteristics of karst caves, a semiclosed and pressurized karst cave simulation box is designed and manufactured to simulate grouting filling processes at construction sites, and an NWC-FM grouting simulation test is carried out. The results show that the fluidity of the NWC-FM slurry is good, and the strengths of the samples in the three groups of designed mix proportions meet the requirements of field construction. The underwater poured NWC-FM shows good fluidity, cohesion, nondispersibility, self-leveling, and self-compacting. After each pouring of NWC-FM material, a 2∼3 cm isolation layer eventually forms on the surface due to the action of the additives, which can effectively block the contact between water and NWC-FM and ensure the flatness of the underwater poured surface of the NWC-FM material. The average compressive strength of the NWC-FM consolidated core samples at 7 d, 14 d, and 28 d are 0.56 MPa, 0.72 MPa, and 0.79 MPa, respectively, meeting the technical strength requirements of construction sites. NWC-FM has strong underwater nondispersibility and moderate strength, which can well meet the requirements of karst cave filling treatment during shield construction of urban subways. Additionally, as a low-cost and environmentally friendly material, NWC-FM will greatly reduce the project cost and minimize environmental pollution. |
| format | Article |
| id | doaj-art-9f889a18f20841cfa99cb1e15cf8c6ed |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-9f889a18f20841cfa99cb1e15cf8c6ed2025-08-20T03:38:30ZengWileyAdvances in Civil Engineering1687-80942022-01-01202210.1155/2022/2618478Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM)Yanmei Ruan0Xu Luo1Shan Lin2Xingkai Pei3Guangzhou Metro Design & Research Institute Co., Ltd.Guangzhou Metro Design & Research Institute Co., Ltd.Guangzhou Metro Design & Research Institute Co., Ltd.Guangzhou Metro Design & Research Institute Co., Ltd.To solve the problem of waste slag treatment of slurry shields, a reuse scheme in which waste shield mud is used to replace traditional karst cave grouting filling material which is proposed; thus, a new type of underwater cementitious filling material (NWC-FM) is developed. NWC-FM is convenient, inexpensive, and environmentally friendly. Its mix proportion is designed, and its mechanical performance is tested. According to the characteristics of karst caves, a semiclosed and pressurized karst cave simulation box is designed and manufactured to simulate grouting filling processes at construction sites, and an NWC-FM grouting simulation test is carried out. The results show that the fluidity of the NWC-FM slurry is good, and the strengths of the samples in the three groups of designed mix proportions meet the requirements of field construction. The underwater poured NWC-FM shows good fluidity, cohesion, nondispersibility, self-leveling, and self-compacting. After each pouring of NWC-FM material, a 2∼3 cm isolation layer eventually forms on the surface due to the action of the additives, which can effectively block the contact between water and NWC-FM and ensure the flatness of the underwater poured surface of the NWC-FM material. The average compressive strength of the NWC-FM consolidated core samples at 7 d, 14 d, and 28 d are 0.56 MPa, 0.72 MPa, and 0.79 MPa, respectively, meeting the technical strength requirements of construction sites. NWC-FM has strong underwater nondispersibility and moderate strength, which can well meet the requirements of karst cave filling treatment during shield construction of urban subways. Additionally, as a low-cost and environmentally friendly material, NWC-FM will greatly reduce the project cost and minimize environmental pollution.http://dx.doi.org/10.1155/2022/2618478 |
| spellingShingle | Yanmei Ruan Xu Luo Shan Lin Xingkai Pei Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) Advances in Civil Engineering |
| title | Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) |
| title_full | Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) |
| title_fullStr | Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) |
| title_full_unstemmed | Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) |
| title_short | Experimental Study on Simulation Filling of New Underwater Cementitious Filling Material (NWC-FM) |
| title_sort | experimental study on simulation filling of new underwater cementitious filling material nwc fm |
| url | http://dx.doi.org/10.1155/2022/2618478 |
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