Dynamic Mechanical Behavior of Fiber-Reinforced Seawater Coral Mortars
| Autor: | Yaocheng Wang, Hao-Dao Li, Qi-Ling Luo, Wu-Jian Long, Jiangsong Tang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Coral PVA fiber 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology lcsh:Technology Article 0201 civil engineering coral aggregate Brittleness 021105 building & construction General Materials Science Fiber Composite material lcsh:Microscopy Elastic modulus lcsh:QC120-168.85 Cement Aggregate (composite) lcsh:QH201-278.5 lcsh:T seawater coral mortar Dynamic mechanical analysis lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering dynamic mechanical behavior Mortar lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials Materials, Vol 13, Iss 1, p 118 (2019) Volume 13 Issue 1 |
| ISSN: | 1996-1944 |
| Popis: | Coral aggregate has been widely used for island construction because of its local availability. However, the addition of coral aggregate exaggerates the brittle nature of cement-based materials under dynamic loading. In this study, polyvinyl alcohol (PVA) fiber was used to improve dynamic mechanical behavior of seawater coral mortars (SCMs). The effects of coral aggregate and PVA fiber on the workability, static mechanical strengths, and dynamic mechanical behavior of fiber-reinforced SCMs were investigated. Results showed that the workability of the SCM decreased with increasing coral aggregate replacement rate and PVA fiber content. Mechanical strengths of the SCM increased with increasing PVA fiber content, but decreased with increasing coral aggregate replacement rate. Dynamic mechanical behavior at varying coral aggregate replacement rates was analyzed by combining dynamic mechanical analysis and micro-scale elastic modulus experiment. With increasing coral aggregate replacement rate, the storage modulus, loss factor, and elastic modulus of the interfacial transition zone in the SCM decreased. Nevertheless, with the incorporation of PVA fibers (1 vol.%), the storage modulus and loss factor were improved dramatically by 151.9 and 73.3%, respectively, compared with the reference group. Therefore, fiber-reinforced coral mortars have a great potential for use in island construction, owing to the excellent anti-vibrational performance. |
| Databáze: | OpenAIRE |
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