Title: Autogenous Shrinkage of Cementitious Paste—State-of-the-Art
Author(s): H. Justnes
Publication: Symposium Paper
Appears on pages(s): 199-214
Keywords: additives; admixtures; autogenous shrinkage; cement paste
This state-of-the-art starts out with a short discussion of the methods for measuring autogenous deformation of cementitious paste and how influence of artifacts (e.g. segregation forming bleed water) can be avoided. The influence of all components of cementitious paste on autogenous shrinkage is reviewed; water-cement ratio, cement type, additives like silica fume and fly ash (including the pozzolanic reaction itself), and ad-mixtures like lignosulphonate and super-plasticizers. The mechanism of autogenous shrinkage is discussed, with emphasis on it's relation to setting time and pore pressure. Finally, remedies to reduce the amount of autogenous shrinkage are briefly mentioned in terms of mechanisms and effects.