Mixture of adjuvant, useful for modification of rheology for self compacting concrete, comprises combination of agent e.g. modified hydroxypropyl guar to increase shear threshold of concrete and viscosing agent e.g. polyethylene oxide

摘要

Mixture of adjuvant for modification of rheology for self compacting concrete, comprises a combination of a first agent significantly increasing the shear threshold of the concrete in fluid state and a second viscosing agent significantly increasing the viscosity of the concrete in fluid state to limit or to prevent the dynamic segregation of aggregates in concrete during its implementation. Independent claims are included for: (1) a cement composition for self compacting concrete comprising cement and a super plasticizer, comprising the mixture of adjuvant and devoid of filler; and (2) a self compacting concrete, comprising the cement composition or the mixture.