ISO 16938-2:2019 建物および土木工事—接合部に使用されるシーラントによる多孔質基材の汚れの測定—パート2：圧縮なしのテスト | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 59, Buildings and civil engineering works, Subcommittee SC 8, Sealants.

This second edition cancels and replaces the first edition (ISO 16938-2:2008), which has been technically revised.

The main changes compared to the previous edition are as follows:

• the title of the document has been modified;
• the figures have been modified and notes have been added to provide further explanation;
• Figure 4 has been replaced by Table 1.

A list of all parts in the ISO 16938 series can be found on the ISO website.

1 Scope

This document specifies a method for determining the staining of porous substrates (e.g. marble, limestone, sandstone, or granite) by sealants used in building construction. The method evaluates the likelihood of a sealant causing an early stain on a porous substrate due to exudation of materials from the sealant. The outcome of the test is specific to the tested sealant and tested substrate and cannot be extrapolated to other sealant formulations or other porous substrates. During this accelerated test, if the sealant does not stain or discolour the substrates, it does not mean that the tested sealant will not stain or discolour the tested porous substrate over a longer time period.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6927 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses: