Study on Slipform Paving of Concrete with Alkali-Free Accelerators
Author Information
Author(s): Deng Yongjing, Ma Guanguo, Sun Zhenjiao, Gao Kang, Ma Hui, Song Tingting, Jia Wenfeng
Primary Institution: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, China
Hypothesis
Can alkali-free accelerators improve the performance of concrete in roadway floor paving?
Conclusion
The FSA-AF alkali-free liquid accelerator significantly enhances the performance of concrete in roadway floor paving, reducing issues like edge collapse and deformation.
Supporting Evidence
- The FSA-AF accelerator showed better performance than the J85 powder accelerator in terms of initial setting time and slump.
- Concrete with 7% FSA-AF accelerator had the highest compressive strength and retention rate.
- The optimal water-cement ratio was determined to be 0.4 with a 9% dosage of the FSA-AF accelerator.
- The study proposed a formula for estimating the width of side concrete, which was found to be 14 cm.
Takeaway
This study found that adding a special liquid to concrete helps it set faster and stay strong, making it better for paving roads without falling apart.
Methodology
The study used mechanical analysis, single factor experiments, orthogonal experiments, and polynomial fitting to determine the optimal parameters for concrete paving.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website