Orthotropic modelling of alkali-aggregate reaction in concrete structures: numerical simulations

Multiscale hydro-thermo-chemo-mechanical coupling: Application to alkali–silica reaction

“…Macroscale Mechanical [19][20][21][22][23] Extensive work has been carried out to identify the expansion strain as a function of the stress tensor Macroscale Chemo-mechanical [24][25][26]15,27] A nonlinear relation between the expansion strain of concrete and the chemical extent was adopted to construct a model at the structural level Macroscale Hydro-thermochemo-mechanical [3,[28][29][30][31][32] Temperature and relative humidity contributed to the chemical extent of ASR and the expansion strain, leading to the failure of the concrete structure Mesoscale Chemo-mechanical [16,[33][34][35][36][37] Randomly distributed aggregates were embedded in the matrix to represent the mesoscale of the concrete. The formation and expansion of ASR gel are described at the level of each individual aggregate.…”

Modelling of the mechanical behavior of concrete affected by alkali-aggregate reaction

“…Alkali-Aggregate Reactions (AAR) are chemical processes involving alkalis present in Portland cement, siliceous minerals found in some kinds of aggregates and water (Capra and Sellier, 2001), having as main consequences on concrete the formation of an hygroscopic expansive gel, swelling and cracking. Bridges, pavements and dams are examples of structures susceptible to this deleterious reaction, which only occurs in the presence of water.…”

A multiscale micromechanical approach to model the deteriorating impact of alkali-silica reaction on concrete

“…Their development followed a phenomenological approach; thermodynamic concepts were introduced to describe the thermo-chemo-mechanical coupling (Ulm et al, 2000;Capra and Sellier, 2003; Bangert et al, 2004;Saouma and Perotti, 2006). Thanks to the technological advancement in microscopic investigation, the attention moved to the aggregate level.…”