Evaluation of Frost Resistance of Concrete Considering Real Environment
By Kensaku Hattori, Masutaka Imai, Takuro Nakamura and Takashi Horiguchi
Concrete Research and Technology
Vol.20, No.3, Sep. 2009 (Issue 51)
- Synopsis:
- This research attempts the improvement of frost-resistance-evaluation with using modified JIS A1148 freezing and thawing test. The major modifications of the test are ; 1) insertion of the dry or wet conditions of room temperature between freezing and thawing cycles in consideration of actual environment, 2) using salt water as well as the ordinary fresh water for the test liquid. This research also investigates the applicability of the scaling evaluation with the JIS freezing and thawing test comparing this with the result of RILEM CIF/CDF test which is the typical scaling in Europe. From these results, frost damege was greatly influenced by the environmental condition and the test liquid. The insertion of the wet conditions of room temperature between freezing and thawing cycles caused severe frost damage. On the other hand, that of the dry condition improved the frost resistance. When the mass loss is less than 5%, test results showed clear relationship between the amount of scaling of JIS freezing and thawing test using salt water and RILEM CDF test. This indicates the applicability of the scaling evaluation by JIS freezing and thawing test.
- Keywords:
- Frost damage, JIS A 1148 A method, dry/wet condition, RILEM CIF/CDF, salt water, scaling
