Chemical Testing

Written By MTE

Introduction to EN 1744-1 - Tests for chemical properties of aggregates

The EN 1744-1 standard serves as a definitive guideline for conducting chemical tests on aggregates, ensuring quality, safety, and efficacy in various applications. Spanning a comprehensive array of procedures, this standard delves into intricate methodologies, from determining water-soluble chloride salts to assessing the unsoundness of blast-furnace and steel slags. The method references the following tests:

7. Determination of Water-Soluble Chloride Salts Using the Volhard Method (Reference Method)

  • Principle

  • Sampling

  • Preparation of test specimens

  • Preparation of extracts

  • Procedure for the determination of chloride content of the extracts

  • Calculation and expression of results

8. Determination of Water-Soluble Chloride Salts by Potentiometry (Alternative Method)

9. Determination of Water-Soluble Chloride Salts Using the Mohr Method (Alternative Method)

10. Determination of Water-Soluble Sulfates

  • In natural and manufactured aggregates

  • In recycled aggregates

11. Determination of Total Sulfur Content

  • By acid digestion (Reference Method)

  • By high temperature combustion (Alternative Method)

12. Determination of Acid Soluble Sulfates

13. Determination of Acid Soluble Sulfides

14. Determination of Components Affecting the Surface Finish of Concrete

15. Determination of Organic Components Affecting the Setting and the Hardening of Cement

16. Determination of Water Solubility

17. Determination of Loss on Ignition

18. Determination of Free Lime in Steel Slag

19. Determination of Unsoundness of Blast-Furnace and Steel Slags

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