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Mechanical properties of alkali-activated materials, State-of-the-Art Report of the RILEM Technical Committee 294-MPA: Autogenous Shrinkage of Alkali-Activated Materials

par Li, Zhenming Z. L.;Benboudjema, Farid;Delsaute, Brice ;Ducman, Vilma;Hu, Zhangli;Lacante, Maïté ;Li, Ning;Lu, Tianshi;Lv, Yang;Ma, Yuwei;Qu, Zhengyao;Rodriguez-Sanchez, Jesus;Staquet, Stéphanie ;Vafaei, Babak;Ye, Guang;Ye, Hailong;Yin, Kangting;Zhang, Zuhua;Zhu, Xiaohong;Zibret, Lea
Référence Vol. 46
Publication Publié, 2026-01-02

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Résumé :

Alkali-activated materials (AAMs), as eco-friendly alternatives to Port-land cement (PC), have attracted increasing attention of researchers and users in thepast decades. Despite the eco-friendly nature of AAMs, doubts about these materialsas an essential ingredient of concrete exist, regarding, for example, their volumestability. One possible volume change concerns autogenous shrinkage. Autogenous shrinkage is the self-created volume reduction of materials due to chemical reactionswithout the need for substance or heat exchange with the environment. If the autoge-nous shrinkage of a binder material is too large, cracking might happen, which willseriously impair the durability of concrete. The aim of this chapter is to provide astate-of-the-art review on the autogenous shrinkage of AAMs. The different charac-teristics and mechanisms of autogenous shrinkage of different AAMs are reported.Corresponding shrinkage-mitigating strategies are summarized. Existing models tosimulate and predict the autogenous shrinkage of AAMs are reviewed. Remarksare then given on testing methods of autogenous shrinkage, which link back to thedetermination of the magnitude of autogenous shrinkage of AAMs. Connectionsbetween autogenous shrinkage and other deformations such as drying shrinkage,thermal deformation and creep are also discussed. Research gaps and outlook onfuture research in this field are given in the end.