Numerical Simulation of Nanoindentation for the LD and HD Calcium Silicate Hydrates

ZHAO Jing-jing; ZHANG Qing; HUANG Dan; SHEN Feng

doi:10.3879/j.issn.1000-0887.2013.11.004

Volume 34 Issue 11

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ZHAO Jing-jing, ZHANG Qing, HUANG Dan, SHEN Feng. Numerical Simulation of Nanoindentation for the LD and HD Calcium Silicate Hydrates[J]. Applied Mathematics and Mechanics, 2013, 34(11): 1150-1156. doi: 10.3879/j.issn.1000-0887.2013.11.004

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Numerical Simulation of Nanoindentation for the LD and HD Calcium Silicate Hydrates

doi: 10.3879/j.issn.1000-0887.2013.11.004

¹State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University, Nanjing 210098, P.R.China;²Department of Engineering Mechanics, Hohai University, Nanjing 210098, P.R.China

Funds: The National Natural Science Foundation of China（51179064;11132003）

Received Date: 2013-07-08
Rev Recd Date: 2013-08-24
Publish Date: 2013-11-15

Abstract

Abstract

Calcium silicate hydrate(C-S-H) is the key component to determine the performance of the Portland cement based material C-S-H is a continuous solid material in hydration products. It accounts for 50%~60% of the hydrated cement slurry volume. C-S-H is the main ingredient to decide the hardened cement slurry’s physical structure and performance. At the same time, C-S-H is one of the important influential factors for concrete structure coherence and durability in macro view. Models became increasingly important to predict the bulk properties of cement and concrete, such as shrinkage, creep, permeability and cracking. Two numerical models were presented respectively for the low-density and high-density C-S-H gel phases in cement paste. C-S-H was introduced as an assemblage of discrete granular particles at nanoscale with realistic particle-level properties. With the molecular dynamics method, nanoindentation simulation was performed on each phase. Through control of particle volume fraction of C-S-H and with the other particle-level material properties kept constant, the results further show that the indentation modulus and hardness conform well to the law of the data from nanoindentation experiments in literature.
- C-S-H,
- molecular dynamics,
- numerical simulation,
- nanoindentation

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References(15)

References

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