Effect of a complex nanomodifier on the shrinkage of fine-grained concrete

The article discusses the effect of a complex nano modifier on shrinkage deformations of cement-sand concrete. It is indicated that the introduction of a certain number of cellulose nanofibers into the mixture inhibits the deformation of the cement matrix and, thus, significantly reduces shrinkage, but at the same time can lead to a decrease in the strength of the composite at an early age. In order to compensate for the negative effects, the possibility of using a complex modifying system, including a superplasticizer, nanocellulose and a modifier consisting of nanoparticles of various nature, has been studied. The results of studies of the effect of the composition of a complex nanomodifier on shrinkage and strength of fine-grained concrete are presented. A rational combination of components has been established to reduce shrinkage deformations while maintaining the strength characteristics of the material.

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