Identification of transversely isotropy of calcium silicate hydrate using nanoindentation and finite element analysis

Vimonsatit, Vanissorn; Lee, Hyuk; Huen, Wai Yeong; Mendis, Priyan; Baduge, Shanaka Kristombu; Thilakarathna, Sadeep

doi:10.1016/j.conbuildmat.2020.119900

Cited by 5 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results show that the indentation modulus and hardness are directional dependant. The range of anisotropic mechanical properties, which are determined based on finite element simulation and artificial neural network 20 , agrees well with the results reported in the literature 47,48 . The results also show anisotropic behaviour in both the indentation modulus and hardness.…”

Section: Resultssupporting

confidence: 87%

“…A total of approximately 500 nanoindentation locations has been carried out. This work follows a similar approach from previous work 20 to model the coating as a transversely isotropic model with elasticity and plasticity properties as shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

“…1). More details of this approach are given in the authors' previous work 20 . At this point, it becomes evident that the theoretical homogenised indentation modulus and hardness cannot be solved deterministically because the local microporosity is unknown.…”

Section: Microporomechanics Methodologymentioning

confidence: 99%

See 2 more Smart Citations

Transversely isotropic elastic-plastic properties in thermal arc sprayed Al–Zn coating: a microporomechanics approach

Huen

Lee

Vimonsatit

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Transversely isotropic elastic-plastic properties in thermal arc sprayed Al–Zn coating: a microporomechanics approach

Huen

Lee

Vimonsatit

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although it is clear that the structural anisotropy strain under uniaxial loading should be considered, 50 the difference between isotropic and anisotropic analyses is negligible for metallic glasses 30,51 . In addition, it is still controversial whether C–S–H possesses intrinsically anisotropic properties or transversely isotropic properties owing to its imperfect structure 52 . Vimonsatit et al reported that the solid in the C–S–H phase exhibited an isotropic behavior, which was determined the nanoindentation technique and finite element analysis 52 .…”

Section: Resultsmentioning

confidence: 99%

“…In addition, it is still controversial whether C–S–H possesses intrinsically anisotropic properties or transversely isotropic properties owing to its imperfect structure 52 . Vimonsatit et al reported that the solid in the C–S–H phase exhibited an isotropic behavior, which was determined the nanoindentation technique and finite element analysis 52 . Thus, we analyzed the elastic strain of the C–S–H paste in reciprocal space and real space using an isotropic structure function.…”

Section: Resultsmentioning

confidence: 99%

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

Jee

Suh

et al. 2021

J Am Ceram Soc

View full text Add to dashboard Cite

This study aims to elucidate the effect of heating on the local atomic arrangements, structure, phase transformation, and mechanical properties of synthesized calcium–silicate–hydrate (C–S–H). The alteration in the atomic arrangement of the synthesized C–S–H (Ca/Si =0.8) and the formation of crystalline phases that occurred in three distinct transformation stages of dehydration (105°C–200°C), decomposition (300°C–600°C), and recrystallization (700°C–1000°C) were investigated via powder X‐ray diffraction, 29Si nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. Further, the deformation of the local atomic bonding environment and variations in mechanical properties during the three stages were assessed via pair distribution function analysis based on in‐situ total X‐ray scattering. The results revealed that the C–S–H paste before heating exhibited a lower elastic modulus in real space than that in the reciprocal space in the initial loading stage because water molecules acted as a lubricant in the interlayer. At the dehydration stage, the strain as a function of external loading exhibited irregular deformation owing to the formation of additional pores induced by the evaporation of free moisture. At the decomposition stage, the structural deformation of the main d‐spacing (d ≈ 3.0 Å) was similar to that of the real space before the propagation of microcracks. At the recrystallization stage, the elastic modulus increased to 48 GPa owing to the thermal phase transformation of C–S–H to crystalline β‐wollastonite. The results provide direct experimental evidence of the microstructural and nanostructural deformation behavior of C–S–H pastes after exposure to high temperature under external loading.

show abstract

The nanomechanical nature of cementitious calcium-(alumino)silicate-hydrate under ultra-low temperature attack: An intrinsic transition and the role of aluminum for bottom-up enhancement

Zhu

Ren

et al. 2022

Cement and Concrete Composites

View full text Add to dashboard Cite

Identification of transversely isotropy of calcium silicate hydrate using nanoindentation and finite element analysis

Cited by 5 publications

References 30 publications

Transversely isotropic elastic-plastic properties in thermal arc sprayed Al–Zn coating: a microporomechanics approach

Transversely isotropic elastic-plastic properties in thermal arc sprayed Al–Zn coating: a microporomechanics approach

Temperature effects on local structure, phase transformation, and mechanical properties of calcium silicate hydrates

The nanomechanical nature of cementitious calcium-(alumino)silicate-hydrate under ultra-low temperature attack: An intrinsic transition and the role of aluminum for bottom-up enhancement

Contact Info

Product

Resources

About