TB/T 2922.5-2002Railway Concrete Accelerated Mortar Bar aggregate alkali reactivity test methods for (English PDF)

Foreword

This Standard was prepared according to ASTM C 1260-94 Standard Test Method for Potential Alkalization of Cement-Aggregate Mixture (Mortar-Rod Method) of American Society for Testing and Materials (ASTM), and combined with China's laboratory conditions and levels; its major technical content is equivalent to the ASTM C 1260-94;

but the test procedures and methods are appropriately modified. Therefore, this Standard is the modification and adoption of ASTM C 1260-94.

The serial standards that are relevant to this Standard include.

TB/T 2922.1 Test Methods for Alkali Reactivity of Aggregates for Railway Concrete –Petrographic Facies Method TB/T 2922.2 Test Methods for Alkali Reactivity of Aggregates for Railway Concrete –Chemical Method TB/T 2922.3 Test Methods for Alkali Reactivity of Aggregates for Railway Concrete –Mortar Bar Method TB/T 2922.4 Test Methods for Alkali Reactivity of Aggregates for Railway Concrete –Rock Column Method the specific operating procedures of different test methods in these serial standards are independent; but the evaluation of the test results is interrelated; the users shall select appropriate method to test and evaluate according to the actual situations.

This Standard was proposed and under the jurisdiction of Research Institute of Standards and Measurement, Ministry of Railways.

Drafting organizations of this Standard. Railway Engineering Research Institute of China Academy of Railway Sciences.

Chief drafting staffs of this Standard. Xie Yongjiang, Wang Jiawei, and Pan Tingyu.

This Standard was entrusted to the Railway Engineering Research Institute of China Academy of Railway Sciences to explain.

This Standard was first-time published in May 2002.

Test Method for Alkali Reactivity of Aggregates for Railway Concrete – Rapid Mortar-Bar Method

1 Scope

This Standard specifies the sampling method, apparatus, test procedures, result treatment method, etc. of using the rapid mortar bar method to inspect the alkali reactivity of aggregate for railway concrete.

This Standard is applicable to evaluate the alkali-silicate reactivity of siliceous aggregate; it is also applicable to the alkali-silicate reactivity of components in the carbonate aggregate.

2 Normative References

The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards.

GB/T 17671-1999 Method of Test Cements – Determination of Strength JC/T 681-1997 Mixer for Mixing Mortars JGJ 52-1992 Standard for Technical Requirements and Test Method of Sand and Crushed Stone (or Gravel) for Ordinary Concrete JGJ 53-1992 Quality Standard and Test Method of Gravel and Crushed Stone for Ordinary Concrete TB/T 2922.3-1998 Test Methods for Alkali Reactivity of Aggregates for Railway Concrete - Mortar Bar Method

3 Terms