Influence of accelerator type on the volume stability of shotcrete and the establishment of shrinkage model
Source abstract
Abstract
The characteristics of shotcrete can lead to significant shrinkage deformation, presenting potential threats to tunnel structure safety. To research this concern, in this study the effects of three accelerators on the volume stability of cement paste, cement mortar and concrete were investigated. The correlation equations of the shrinkage deformation of cement paste, cement mortar and concrete were established, and the drying shrinkage prediction model of cement mortar with accelerator was constructed by combining the ACI 209 model and the GL2000 model. Findings from this study show that the liquid alkali accelerator AR had the greatest autogenous shrinkage and drying shrinkage, with the highest mass loss under drying conditions. The study demonstrated that there exists a good linear relationship between the shrinkage deformation of cement paste, cement mortar and concrete with accelerator. Finally, the proposed prediction model for drying shrinkage of cement mortar exhibits strong predictive capabilities.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Concrete Properties and Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
PhD student, College of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi, PR China (corresponding author: )
Professor, College of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi, PR China (co-corresponding author: )
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