What is PD CEN/TS 12390-9 - Freeze-thaw scaling resistance of concrete about?
PD CEN/TS 12390 is a series of international standards on concrete used for building construction that have the capacity to bear the structural as well as service loads that are applied to it.
PD CEN/TS 12390-9 is the ninth part of the PD CEN/TS 12390 series of documents that describes the testing of the freeze-thaw scaling resistance of concrete both with water and with sodium chloride solution.
PD CEN/TS 12390-9 can be used either to compare new constituents or new concrete compositions against a constituent or a concrete composition that is known to give adequate performance in the local environment or to assess the test results against some absolute numerical values based on local experiences.
Extrapolation of test results to assess different concretes, i.e., new constituents or new concrete compositions require an expert evaluation.
There is no established correlation between the results obtained by the three test methods. All tests will clearly identify poor and good behaviour, but they differ in their assessment of marginal behaviour.
The application of different acceptance limits for test results enables assessment for different degrees of exposure severity.
Who is PD CEN/TS 12390-9 - Freeze-thaw scaling resistance of concrete for?
PD CEN/TS 12390-9 on testing hardened concrete is useful for:
- Builders and architects
- Civil engineers
- Manufacturers of concrete and concrete products
Why should you use PD CEN/TS 12390-9 - Freeze-thaw scaling resistance of concrete?
Concrete structures exposed to the effects of freezing and thawing need to be durable to have adequate resistance to this action and, in cases such as road construction, to freezing and thawing in the presence of de-icing agents.
PD CEN/TS 12390-9 navigates you through the making of test specimens of concrete that require vibration for compaction is compacted on a vibrating table.
PD CEN/TS 12390-9 provides principle, equipment, preparation, test procedure, expression of results and test report of test specimens of concrete for:
- Slab test (reference method)
- Cube test (alternative method)
- CF/CDF-test (alternative method)
The functional relation between scaling and repeatability and reproducibility of coefficient of variation (scaling with 3 %-sodium chloride solution) and precision data for appropriate scaling level are set out in PD CEN/TS 12390-9.
PD CEN/TS 12390-9 provides the guideline for the selection of brush and their quantitative specifications regarding stiffness and hardness of brush hair.
Overall, PD CEN/TS 12390-9 aids you in the manufacture of concrete for building structures by measuring freeze-thaw scaling resistance to prevent expansion and cracking, scaling, and crumbling.
As a result, concrete testing is critical for analysing the strength, durability, and increased compressive strength of various cement formulations during freeze-thaw testing.
What’s changed since the last update?
PD CEN/TS 12390-9:2016 supersedes DD CEN/TS 12390-9:2006. PD CEN/TS 12390-9:2016 includes some technical changes with respect to DD CEN/TS 12390-9:2006. These include:
- The normative references have been updated
- A prescription measuring the CO2 content of the air in the storage room has been introduced
- The alternative applications have been strictly specified
- Technical specification has been introduced.