Characterizing and Quantifying the Shrinkage Resistance of Alkali-Activated (Cement Free) Concrete and Evaluating Potential Methods for Reducing Early-Age Cracking in Pavements and Bridges
This report summarizes the findings of an experimental investigation into shrinkage, and the mitigation thereof, in alkaliactivated fly ash and slag binders and concrete. The early-age (chemical and autogenous) and later-age (drying and carbonation) shrinkage of sodium silicate-activated fly ash and slag binders was evaluated in accordance with relevant specifications. The influence of activator concentration and water content on the resulting shrinkage was investigated. The shrinkage behavior of alkali-activated binders and concrete was compared to that of ordinary portland cement.