Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11001030 | Construction and Building Materials | 2018 | 9 Pages |
Abstract
Frost resistance is an important factor that can affect the durability of structural concrete. This paper reviews previous studies on freeze-thaw resistance of concrete from the mechanism viewpoint. Observations have revealed that concrete additives can be utilized via different mechanisms to enhance concrete freeze-thaw durability. There are four mechanisms contributing frost resistance: (a) providing extra space for ice expansion in concrete using air bubbles, (b) reducing the porosity of concrete using pozzolans and fillers, (c) containing crack propagation using microfibers, nanotubes and nanosheets, and (d) decreasing water absorption using hydrophobic agents. Each mechanism has been discussed profoundly. However, future investigations are needed to provide a better insight into the grey areas, especially in nanoscale additives and hydrophobic concrete. Researchers should devote more investigations to integrate experiments and extract optimum conditions and dosages for the discussed additives.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Khashayar Ebrahimi, Mohammad Javad Daiezadeh, Mohammad Zakertabrizi, Farhad Zahmatkesh, Asghar Habibnejad Korayem,