How Freeze-Thaw Cycles Affect Concrete Carbonation
Author Information
Author(s): Zhang Shuhua, Tan Guangrong, Qi Zhiqiang, Tian Bin, Cao Jijun, Chen Bofu, de Borst René
Primary Institution: The Seventh Geological Brigade of Hubei Geological Bureau
Hypothesis
The carbonation depth of concrete is influenced by freeze-thaw cycles and its microstructure.
Conclusion
Freeze-thaw cycles increase the carbonation depth of concrete, while carbonation improves its compressive strength.
Supporting Evidence
- The carbonation depth of concrete increases with the number of freeze-thaw cycles.
- Carbonization improves the relative dynamic elastic modulus of concrete.
- Concrete with higher water-binder ratios shows greater carbonation depth.
- Carbonization products fill pores in concrete, enhancing its strength.
Takeaway
When concrete freezes and thaws, it can get damaged, but if it also absorbs carbon dioxide, it can become stronger.
Methodology
The study involved accelerated carbonation experiments on concrete subjected to freeze-thaw cycles, measuring carbonation depth, compressive strength, and porosity.
Limitations
The study primarily focuses on the effects of freeze-thaw cycles and carbonation without considering other environmental factors.
Digital Object Identifier (DOI)
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