10060 2017 - Gost

The concrete is considered to have passed the test for its assigned grade if:

Freezing in a 5% NaCl solution and thawing in the same solution. Structures exposed to de-icing salts or seawater. Freezing in air at lower temperatures (down to -50∘Cnegative 50 raised to the composed with power C ) to speed up results. Urgent quality control or high-grade concrete. Accelerated Method 2 gost 10060 2017

: Once the target number of cycles (the "F" grade) is reached, test the "main group" for compressive strength. 5. Evaluation Criteria The concrete is considered to have passed the

: Freezing usually occurs at temperatures between -16∘Cnegative 16 raised to the composed with power C -20∘Cnegative 20 raised to the composed with power C , while thawing occurs in water at +18∘Cpositive 18 raised to the composed with power C +22∘Cpositive 22 raised to the composed with power C 3. Methods of Testing Urgent quality control or high-grade concrete

: Concrete is assigned a frost resistance grade (e.g., F100, F200), where the number represents the minimum number of freeze-thaw cycles the concrete can survive while meeting specific strength and mass loss criteria. 2. General Testing Requirements

: The average compressive strength of the frozen/thawed specimens has not decreased by more than 5% compared to the control specimens.