Temperature Effects on Tensile and Compressive Mechanical Behaviors of C-S-H Structure via Atomic Simulation

Hao Xin (1) , Weihui Lin (1) , Jia Fu (2) , Wu Li (1) , Zhihua Wang (1)

1 Taiyuan University of Technology
2 LGCGM - Laboratoire de Génie Civil et Génie Mécanique

An atomic scale model of amorphous calcium silicate hydrate (C-S-H) with Ca/Si ratio of 1.67 is constructed. Effects of temperature on mechanical properties of C-S-H structure under tensile and compressive loading in the layered direction are investigated via molecular dynamics simulations. Results from present simulations show that (1) the tensile strength and Young's modulus of C-S-H structure significantly decrease with the increase of the temperature; (2) the water layer plays an important role in the mechanical properties of C-S-H structure; (3) the compressive strength is stronger than tensile strength, which corresponds with the characteristic of cement paste.

Domaines: Génie civil; Mécanique [physics.med-ph]

Hao Xin, Weihui Lin, Jia Fu, Wu Li, Zhihua Wang. Temperature Effects on Tensile and Compressive Mechanical Behaviors of C-S-H Structure via Atomic Simulation. Journal of Nanomaterials, 2017, 2017, pp.8476258. ⟨10.1155/2017/8476258⟩. ⟨hal-01685559⟩