Abstract
In this study, the rheo-viscoelastic behaviors of calcium sulphoaluminate (CSA) modified Portland cement (PC) pastes were investigated. The shear stress, apparent viscosity, frequency sweep and time sweep curves of composite pastes with different PC and CSA volume fractions were analyzed, and the minimum apparent viscosity (ηmin) of PC-CSA pastes were predicted. Results show that with the increase of PC and CSA volume fractions, ηmin, critical strain and flow strain of pastes increase at both 5 min and 60 min resting time, and the phase angle varies under different time spots. The accuracy of viscosity prediction models for 5 min and 60 min are both relatively high. Meanwhile, the reason why the prediction accuracy of 5 min is higher than 60 min is that with the prolongation of resting time, the relationships between particle volume fractions and rheological properties are affected by early microstructure formed by flocs and hydration products, thus affecting their original functional relationship at 5 min.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
