Ammonia Release Limit For Concrete Admixtures

scope
This standard specifies the limits for ammonia release from concrete admixtures.
This standard is applicable to all types of ammonia-releasing concrete admixtures for construction with indoor use. It is not applicable to concrete admixtures for bridges, highways and other outdoor projects.
normative citation
The provisions in the following documents become provisions of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest edition applies to this standard.
GB /T 8 075 Classification, naming and definition of concrete admixtures
Terms and definitions
The terms and definitions established in GB/T 8075 and below apply to this standard.
concrete admixturesconcrete admixtures
Substances added during the concrete making process to improve the properties of concrete.
Require
The amount of ammonia released from concrete admixtures is ≤ 0.10% (mass fraction).
experiment method
5.1 Sampling and retaining samples
Randomly select 1kg sample from the admixture of the same number, mix it evenly, and divide it into two parts. One part shall be sealed and stored for three months, and the other part shall be used as a test sample.
5.2 Test methods
Follow Appendix A.