Internal curing is a practical way of supplying additional curing water throughout the concrete mixture thereby enhancing conventional surface curing. This is done by using water absorbed in the inclusions of prewetted ESCS lightweight aggregate that is drawn-out during the hydration process. This is commonly referred to as “curing concrete from the inside out.” Extensive research has shown that internal curing reduces autogenous shrinkage, drying shrinkage, plastic shrinkage and the cracking associated with all three. Research has also shown that internally cured concrete has lower restrained shrinkage cracking, reduced fluid absorption, improve compressive strength and reduced ion diffusion, all of which improves the concrete’s service life.
Bentz DP (2009) Influence of internal curing using lightweight aggregates on interfacial transition zone percolation and chloride ingress in mortars. Cem Concr Compos 31:285–289. doi: 10.1016/j.cemconcomp.2009.03.001
Cusson D, Lounis Z, Daigle L (2010) Benefits of internal curing on service life and life-cycle cost of high performance concrete bridge decks – A case study. Cem Concr Compos 32:339–350. doi:10.1016/j.cemconcomp.2010.02.007
Henkensiefken R, Bentz D, Nantung T, Weiss J (2009) Volume change and cracking in internally cured mixtures made with saturated lightweight aggregate under sealed and unsealed conditions. Cem Concr Compos: 427–437. doi: 10.1016/j.cemconcomp.2009.04.003
Lopez M, Kahn LF, Kurtis KE (2009) Characterization of elastic and time-dependent deformations in high performance lightweight concrete by image analysis. Cem Concr Res 39:610–619. doi: 10.1016/j.cemconres.2009.03.015
Radlinska A, Pease B, Weiss J (2006) A preliminary numerical investigation on the influence of material variability in the early-age cracking behavior of restrained concrete. Mater Struct 40:375–386. doi:10.1617/s11527-006-9118-8