Abstract
Electrical conductivity (EC), pH, spreadability, viscosity, and temperature measurements were used to evaluate the impact of superplasticiser (SP) (lignosulphonates (A),polyacrylates (B), polycarboxylates (C)) on the cement paste with CNTs properties.Compared to the pure paste’s viscosity,SP(A), characterised with high EC values, causes the rise in the paste temperature and viscosity, but SP(C) and SP(B), with lower EC values, reduce the specified parameters. While interacting with CNTs, SP(C), SP(B) and SP(C + B) blend, lowers paste initial temperature, longer structure formation and hydration process. When SP(A)is used, the aforementioned processes take place in an opposite way. By interaction with CNTs and SP(A), more of ettringite and less of portlandite than in the other samples is formed. DTA/TGstudy confirmed that at least 2.4% of portlandite is formed in a sample with SP(A), more than 3.1% and 3.4% in samples with SP(C) and SP(B), and4.1%in sample withSP(C + B).In the samples with a blend of SP and CNTs, the gain of compressive strength was achieved - up to 20%after 28 days of curing, in comparison to the samples with separately used SP’s, this could be related to the interaction effect between the CNTs and the blend of SP.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.