Influence of pre-wetted mortar particles on the early-aged autogenous shrinkage of high-strength concrete
CHEN Peiyuan
MA Honghao
WANG Yuxuan
Abstract：Early-age pre-wetted mortar particles with W/C of 0.5 were used as internal curing agent to investigate the influence on the early-age autogenous shrinkage,compressive strength and microstructure of high-strength concrete. Results showed that mortar particles as internal curing agent could mitigate the autogenous shrinkage of high-strength concrete,higher amount of added pre-wetted mortar particles could lead to more reduction of autogenous shrinkage. Proper amount of pre-wetted mortar particles would not significantly reduce the compressive strength,and 12% substitution ratio of sand by mortar particles could reduce 46.6%of the average autogenous shrinkage,which led to a reduction of the 28 day compressive strength at only 6.7%. Mortar particles are reactive internal curing agent,which allows further hydration reaction within concrete,thus,refining the porosity and strengthening the microstructure of cement paste surrounding mortar particles.
Keywords：internal curingpre-wetted mortar particlesautogenous shrinkagehigh-strength concrete
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 1-4 )