Autogenous shrinkage of high performance concrete
Autogenous shrinkage is a major concern in early age cracking of high performance concrete. Low water-to-binder ratio and incorporation of supplementary cementitious materials can remarkably increase the shrinkage in the matrix.
Major influential factors in autogenous shrinkage are pore structure, relative humidity, self-stress, degree of hydration, and interface structure.
Discussion of influential factors
In this review, the mechanism of autogenous shrinkage of high performance concrete (HPC) and influential factors in its development are discussed. In general, autogenous shrinkage is more pronounced in HPC, albeit, using low heat cement, fly ash, shrinkage reducing agents, lightweight aggregates, and fibers can effectively reduce it. The effects of supplementary cementitious materials (SCMs) on autogenous shrinkage, relationship between different types of shrinkage and autogenous shrinkage as well as the effect of internal curing on autogenous shrinkage need to be further studied.
The study is published in: Construction and Building Materials, Volume 149, 15 September 2017, Pages 62–75
