Effect of shrinkage reducing agents on the volume stability and pore structure of activated powder concrete
CHEN Yanwen
LIU Luxiao
Abstract：Making use of the volume stability of active powder concrete,SBT-SRA(1)concrete shrinkage reducer was selected in the experiment to study the effect of shrinkage reducer dosage on the pore structure,volume shrinkage rate,and mechanical prop-erties of active powder concrete.Research has shown that shrinkage reducing agents can increase the number of harmless pores be-low 100nm in active powder concrete,reduce pore volume,optimize pore structure,slow down the rate of water loss during the hard-ening process of active powder concrete,reduce the surface tension of the liquid in its internal capillaries,and achieve the effect of reducing shrinkage.As the dosage of shrinkage reducing agent increases from 1.2%to 2.0%,the shrinkage rate gradually decreases,and the early strength decreases significantly,but the later strength does not decrease significantly.
Keywords：shrinkage reducing agentRPCshrinkage rateporosity
Publication Date：2025-08-25
Online Publishing Date：2025-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 79-83 )