Controlling factors of reaction-induced stress and strain during hydration reactions: Experimental investigation in CaSO₄–H₂O system

Abstract

To investigate the controlling factors of reaction-induced stress and strain during hydration reactions, the reaction-induced stress and strain were directly measured in CaSO₄–H₂O system. The results show that reaction-induced stress and strain are primarily controlled by the competitions between reaction rate and deformation rate. This competition determines fracture generations and permeability enhancement, and thus can contribute to the fluid distribution within the wedge mantle and crust.