GB/T 328.11-2007 in English

Test methods for building sheets for waterproofing — Part 11: Bitumen sheets for waterproofing-flow resistance at elevated temperature

1 Scope

This part of GB/T 328 specifies the determination of flow resistance of bitumen sheets at elevated temperature. The test is carried out on both the upper face and lower face of the sheet either at a specified temperature or consecutively at different temperatures in order to determine the flow resistance limit.

Therefore the test can be used to provide proof of the flow resistance required for a product or to determine the flow resistance limit specific to the product, e.g. in order to establish the change in this behavior as a result of artificial aging.

The test is not applicable to bitumen sheets without reinforcement.

2 Normative references

The following documents contain provisions which, through reference in this part of GB/T 328, constitute provisions of this part. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 328.1 Test methods for building sheets for waterproofing — Part 1: Bitumen, plastic and rubber sheets for waterproofing-rules for sampling
GB/T 6379.2 Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method (ISO 5725-2:1994, IDT)

3 Terms and definitions

For the purposes of the Method A in this part of GB/T 328, the following terms and definitions apply.

3.1
flow resistance
the ability of bitumen sheet test specimens to be suspended vertically under specified temperature conditions without its coating moving by more than 2 mm compared to the reinforcement 3.2
flow resistance limit (F)
the temperature at which the coating of a vertically suspended bitumen sheet test specimen moves under specified conditions by 2 mm compared to the reinforcement (see Figure 2)

3.3
flow
the maximum distance between the bottom edges of mark 1 and mark 2 on the faces of the sheet test specimens due to the displacement of the coating (see Figure 1)

4 Method A

4.1 Principle

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Method A
5 Method B
6 Test report
Annex A (Informative) Comparison between this part and EN 1110:1999 in clause/subclause number