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Low-energy impact behavior of ambient cured engineered geopolymer composites
Cai, Jingming1,2; Pan, Jinlong1; Han, Jinsheng1; Lin, Yuanzheng1,3; Sheng, Zhaoliang1
2022-04-01
Source PublicationCeramics International
ISSN0272-8842
Volume48Issue:7Pages:9378-9389
Abstract

Engineered geopolymer composite (EGC) is a new kind of fiber reinforced geopolymer composite with tensile strain-hardening behaviors. This paper was intended to investigate the low-energy impact behaviors of EGC. To further reduce the carbon footprint and material cost of EGC, the feasibility of developing ambient cured EGC with cheap local PVA fiber was discussed according to the micromechanics-based analytical models. The compressive, tensile and impact tests of EGC, engineered cementitious composites (ECC), pure geopolymeric matrix and cementitious matrix were conducted and compared. It was found that the EGC specimens have similar tensile behaviors with ECC and the ultimate tensile strain of EGC can be as high as 7.5%. Under impact load, it was found that the PVA fibers could effectively restrict the crushing and spalling of geopolymeric matrix. Also, the dissipated energy of pure geopolymeric matrix is 3.8 times higher than that of cementitious matrix, indicating that it is recommendable to develop impact-resistant material based on geopolymeric matrix. The influences of NaOH molarity on the impact behaviors of EGC and geopolymeric matrix were discussed. It was found that the impact-resistance of EGC improved with the increase of NaOH molarity, while the threshold of NaOH molarity for geopolymeric matrix was recommended as 12 mol/L. Even though the compressive strength of EGC is lower than ECC, it can be concluded that EGC could have comparable or even higher impact-resistance than ECC under different low-velocity impact conditions.

KeywordEngineered Geopolymer Composite Metakaolin Ambient-curing Local Pva Fiber Low-energy Impact
DOI10.1016/j.ceramint.2021.12.133
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000772735700003
Scopus ID2-s2.0-85121731988
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Citation statistics
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorPan, Jinlong
Affiliation1.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, China
2.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, China
3.Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education (ERCSPEIME), Southeast University, Nanjing, 211189, China
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Cai, Jingming,Pan, Jinlong,Han, Jinsheng,et al. Low-energy impact behavior of ambient cured engineered geopolymer composites[J]. Ceramics International, 2022, 48(7), 9378-9389.
APA Cai, Jingming., Pan, Jinlong., Han, Jinsheng., Lin, Yuanzheng., & Sheng, Zhaoliang (2022). Low-energy impact behavior of ambient cured engineered geopolymer composites. Ceramics International, 48(7), 9378-9389.
MLA Cai, Jingming,et al."Low-energy impact behavior of ambient cured engineered geopolymer composites".Ceramics International 48.7(2022):9378-9389.
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