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Strengthening Effect of Graphene Oxide on Mechanical Properties of Interface Transition Zone of Recycled Concrete
- Source :
- Key Engineering Materials. 852:49-58
- Publication Year :
- 2020
- Publisher :
- Trans Tech Publications, Ltd., 2020.
-
Abstract
- The micro-mechanical properties and micro-structural characteristics of the interfacial transition zones of recycled concrete with graphene oxide were studied by using nanoindentor. The results showed that the average elastic modulus and width of the interfacial transition zone of recycled concrete with graphene oxide between new paste matrix and natural aggregate were about 20GPa and 30-35μm, respectively; The mean elastic modulus and transition zone width of the interfacial transition zone between new paste matrix and old paste matrix was about 35GPa and 25-30μm, respectively. By analyzing and calculating the probability distribution of hydration products, it was found that the graphene oxide template increased the proportion of calcium silicate hydrate in the hydrate and enhanced the content of calcium hydroxide crystal group. Compared with ordinary recycled concrete, the elastic modulus distribution in the interfacial transition zone was more uniform and the microstructure was more stable. It can be concluded that graphene oxide can enhance the mechanical properties and microstructure of the interfacial transition zone of recycled concrete so as to improve the macroscopic mechanical properties of recycled concrete.
- Subjects :
- Materials science
Interface (Java)
Graphene
Mechanical Engineering
0211 other engineering and technologies
Oxide
02 engineering and technology
021001 nanoscience & nanotechnology
Microstructure
law.invention
chemistry.chemical_compound
chemistry
Mechanics of Materials
law
021105 building & construction
Transition zone
General Materials Science
Composite material
0210 nano-technology
Subjects
Details
- ISSN :
- 16629795
- Volume :
- 852
- Database :
- OpenAIRE
- Journal :
- Key Engineering Materials
- Accession number :
- edsair.doi...........0357855d4e626dd7613e414a07292caf