Calcium Silicate Hydrate Colloid at Different Humidities Microstructure, Deformation Mechanism, and Mechanical Properties

2021 ◽  
Author(s):  
Chengyao Liang ◽  
Qi Zheng ◽  
Jinyang Jiang ◽  
Paulo JM Monteiro ◽  
Shaofan Li
Keyword(s):  
Mechanical Properties ◽  
Deformation Mechanism ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate

Mechanical Properties and Microstructure Characterization of Calcium Silicate Hydrate (C-S-H) Gel

2010 ◽  
Vol 650 ◽  
pp. 63-66 ◽  
Author(s):  
Ling Qiao ◽  
Li Guo ◽  
Jun Hong ◽  
Xiao Ming Guo
Keyword(s):  
Mechanical Properties ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Mechanical Response ◽  
Orientational Order ◽  
Atomic Scale ◽  
Physical Parameters ◽  
Layered Crystal ◽  
Nematic Order ◽  
Lamella Thickness

The complex behavior of concrete is largely related to the mechanical response of calcium silicate hydrate (C-S-H) gel. During the past two decades, a great deal of efforts has been devoted to the structure of C-S-H at the nanoscale level, including both experiment investigation and molecular simulation. The smallest C-S-H unit has a layered crystal structure at atomic scale, with a lamella thickness in the nm range. And moreover, ordered stacks of up to several tens or even hundreds of nano-lamellae have been observed experimentally. The key features of structure and morphology is remarkably the ubiquitous presence of an orientational order. Now we focus on the physical understanding on such orientational ordered C-S-H structures at mesoscale. In respect that there exists a high nematic order in the stacking C-S-H of nano-lamellae, by introducing some physical parameters, such as the magnitude of nematic order of the nano-lamellae, we try to predict the mechanical properties of the crystalline in terms of its micro-structure.

Insights into the influencing factors on the micro-mechanical properties of calcium-silicate-hydrate gel

2018 ◽  
Vol 102 (4) ◽  
pp. 1942-1952 ◽  
Author(s):  
Chuanlin Hu ◽  
Shun Yao ◽  
Fubing Zou ◽  
Shuai Nie ◽  
Zhichao Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Influencing Factors ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate

scholarly journals Influence of decalcification on structural and mechanical properties of synthetic calcium silicate hydrate (C-S-H)

2019 ◽  
Vol 123 ◽  
pp. 105793 ◽  
Author(s):  
Lin Liu ◽  
Can Sun ◽  
Guoqing Geng ◽  
Pan Feng ◽  
Jiaqi Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate

scholarly journals Effect of Water on the Dynamic Tensile Mechanical Properties of Calcium Silicate Hydrate: Based on Molecular Dynamics Simulation

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2837 ◽  
Author(s):  
Jikai Zhou ◽  
Yuanzhi Liang
Keyword(s):  
Mechanical Properties ◽  
Molecular Dynamics ◽  
Water Content ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Cementitious Materials ◽  
Constitutive Relationship ◽  
Degree Of Saturation ◽  
Strain Rates ◽  
Effect Of Water

To study the effect of water on the dynamic mechanical properties of calcium silicate hydrate (C–S–H) at the atomic scale, the molecular dynamics simulations were performed in uniaxial tension with different strain rates for C–S–H with a degree of saturation from 0% to 100%. Our calculations demonstrate that the dynamic tensile mechanical properties of C–S–H decrease with increasing water content and increase with increasing strain rates. With an increase in the degree of saturation, the strain rate sensitivity of C–S–H tends to increase. According to Morse potential function, the tensile stress-strain relationship curves of C–S–H are decomposed and fitted, and the dynamic tensile constitutive relationship of C–S–H considering the effect of water content is proposed. This reveals the strain rate effect of the cementitious materials with different water content from molecular insights, and the dynamic constitutive relationship obtained in this paper is necessary to the modelling of cementitious materials at the meso-scale.

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