Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads
The recent increase in blast/bombing incidents all over the world has pushed the development of effective strengthening approaches to enhance the blast resistance of existing civil infrastructures. Engineered geopolymer composite (EGC) is a promising material featured by eco-friendly, fast-setting a...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-02-01
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| Series: | Defence Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214914723001332 |
| _version_ | 1797272507997224960 |
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| author | Shan Liu Chunyuan Liu Yifei Hao Yi Zhang Li Chen Zhan Li |
| author_facet | Shan Liu Chunyuan Liu Yifei Hao Yi Zhang Li Chen Zhan Li |
| author_sort | Shan Liu |
| collection | DOAJ |
| description | The recent increase in blast/bombing incidents all over the world has pushed the development of effective strengthening approaches to enhance the blast resistance of existing civil infrastructures. Engineered geopolymer composite (EGC) is a promising material featured by eco-friendly, fast-setting and strain-hardening characteristics for emergent strengthening and construction. However, the fiber optimization for preparing EGC and its protective effect on structural elements under blast scenarios are uncertain. In this study, laboratory tests were firstly conducted to evaluate the effects of fiber types on the properties of EGC in terms of workability, dry shrinkage, and mechanical properties in compression, tension and flexure. The experimental results showed that EGC containing PE fiber exhibited suitable workability, acceptable dry shrinkage and superior mechanical properties compared with other types of fibers. After that, a series of field tests were carried out to evaluate the effectiveness of EGC retrofitting layer on the enhancement of blast performance of typical elements. The tests include autoclaved aerated concrete (AAC) masonry walls subjected to vented gas explosion, reinforced AAC panels subjected to TNT explosion and plain concrete slabs subjected to contact explosion. It was found that EGC could effectively enhance the blast resistance of structural elements in different scenarios. For AAC masonry walls and panels, with the existence of EGC, the integrity of specimens could be maintained, and their deflections and damage were significantly reduced. For plain concrete slabs, the EGC overlay could reduce the diameter and depth of the crater and spallation of specimens. |
| first_indexed | 2024-03-07T14:29:23Z |
| format | Article |
| id | doaj.art-b965aa2250074ed38451f643311bd9d3 |
| institution | Directory Open Access Journal |
| issn | 2214-9147 |
| language | English |
| last_indexed | 2024-03-07T14:29:23Z |
| publishDate | 2024-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Defence Technology |
| spelling | doaj.art-b965aa2250074ed38451f643311bd9d32024-03-06T05:27:02ZengKeAi Communications Co., Ltd.Defence Technology2214-91472024-02-0132496509Experimental investigation of engineered geopolymer composite for structural strengthening against blast loadsShan Liu0Chunyuan Liu1Yifei Hao2Yi Zhang3Li Chen4Zhan Li5Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, ChinaKey Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China; Corresponding author.Tianjin Key Laboratory of Prefabricated Buildings and Intelligent Construction, Hebei University of Technology, Tianjin 300400, China; Corresponding author.Institute of Defense Engineering, AMS, PLA, Beijing 100850, ChinaEngineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education, Southeast University, Nanjing 211189, Jiangsu, ChinaState Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of the PLA, Nanjing 210007, Jiangsu, ChinaThe recent increase in blast/bombing incidents all over the world has pushed the development of effective strengthening approaches to enhance the blast resistance of existing civil infrastructures. Engineered geopolymer composite (EGC) is a promising material featured by eco-friendly, fast-setting and strain-hardening characteristics for emergent strengthening and construction. However, the fiber optimization for preparing EGC and its protective effect on structural elements under blast scenarios are uncertain. In this study, laboratory tests were firstly conducted to evaluate the effects of fiber types on the properties of EGC in terms of workability, dry shrinkage, and mechanical properties in compression, tension and flexure. The experimental results showed that EGC containing PE fiber exhibited suitable workability, acceptable dry shrinkage and superior mechanical properties compared with other types of fibers. After that, a series of field tests were carried out to evaluate the effectiveness of EGC retrofitting layer on the enhancement of blast performance of typical elements. The tests include autoclaved aerated concrete (AAC) masonry walls subjected to vented gas explosion, reinforced AAC panels subjected to TNT explosion and plain concrete slabs subjected to contact explosion. It was found that EGC could effectively enhance the blast resistance of structural elements in different scenarios. For AAC masonry walls and panels, with the existence of EGC, the integrity of specimens could be maintained, and their deflections and damage were significantly reduced. For plain concrete slabs, the EGC overlay could reduce the diameter and depth of the crater and spallation of specimens.http://www.sciencedirect.com/science/article/pii/S2214914723001332Engineered geopolymer compositesFiber optimizationStrengthening materialBlast resistanceMasonry wallReinforced AAC panel |
| spellingShingle | Shan Liu Chunyuan Liu Yifei Hao Yi Zhang Li Chen Zhan Li Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads Defence Technology Engineered geopolymer composites Fiber optimization Strengthening material Blast resistance Masonry wall Reinforced AAC panel |
| title | Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| title_full | Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| title_fullStr | Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| title_full_unstemmed | Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| title_short | Experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| title_sort | experimental investigation of engineered geopolymer composite for structural strengthening against blast loads |
| topic | Engineered geopolymer composites Fiber optimization Strengthening material Blast resistance Masonry wall Reinforced AAC panel |
| url | http://www.sciencedirect.com/science/article/pii/S2214914723001332 |
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