Enhancing thixotropy and structural build-up of alkali-activated slag/fly ash pastes with nano clay
Materials and Structures/Materiaux et Constructions, vol.54, no.4, 2021 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 54 Issue: 4
- Publication Date: 2021
- Doi Number: 10.1617/s11527-021-01760-4
- Journal Name: Materials and Structures/Materiaux et Constructions
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Communication Abstracts, Compendex, ICONDA Bibliographic, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
- Keywords: Thixotropy, Ground blast-furnace slag, Fly ash, Nano clay, Structural build-up
- Dokuz Eylül University Affiliated: Yes
Abstract
© 2021, RILEM.This study investigates the influence of nano clay on the rheological properties of alkali-activated cement pastes having different GGBFS/FA ratios. The thixotropic index, structural build-up, dynamic yield stress and heat evolution of fresh AAC pastes with addition of nano clay are studied. Test results showed that nano clay had a strong influence on the thixotropy/structural build-up and dynamic yield stress of AAC pastes depending on the GGBFS/FA ratio of the mixture. It was found that the pastes with lower GGBFS/FA ratio exhibited higher thixotropic index, but lower dynamic yield stress in the presence of nano clay. This study reveals the importance of GGBFS/FA ratio in the presence of nano clay for obtaining AAC mixtures with low dynamic yield stress for a better flowability and high thixotropy/structural build-up for stability.