New insights into the mechanism governing the elasticity of calcium silicate hydrate gels exposed to high temperature: A molecular dynamics study

• Published in: Cement and concrete research Vol. 141; no. C; p. 106333
• Main Authors: Zhang, Yao, Zhou, Qi, Ju, J. Woody, Bauchy, Mathieu
• Format: Journal Article
• Language: English
• Published: Elmsford Elsevier Ltd 01.03.2021; Elsevier BV; Elsevier
• Subjects: Amorphization; Calcium silicate hydrate; Chemical composition; Dehydration; Exposure; Fire exposure; Gels; High temperature; High-temperature effects; Mechanical properties; Molecular dynamics; Nanoindentation; Packing density; Porosity; Silicon; Stiffening; Stiffness; Temperature effects; Thermal damage; Thermal response; Molecular dynamics; Stiffness; Thermal damage; Calcium–silicate–hydrate; High-temperature effects

When exposed to fire, the integrity of cement-based materials is governed by thermally-induced changes in the mechanical properties of their binding phase, i.e., the calcium–silicate–hydrate (C–S–H) gel. However, the effect of temperature on the structure, density, and mechanical properties of C–S–H...