The presence of organic matter and certain chemicals can have a considerable influence on the strength and durability of concrete. The ability of aggregates to resist excessive changes in volume due to physical changees in the environment is also of importance. Knowledge of these potentially harmful factors will ensure that precautions can be taken at the mix design stage of a project.

Chloride Content: Rapid Method

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Quantab chloride titrators can be used for estimating the chloride content of aqueous solutions. They are suitable for site testing and quality control of aggregates requiring less than 30 minutes to obtain a result.

Model No. Range
42-2950 30 - 600
42-2952 300 - 6000

Organic Impurities in Fine Aggregate

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If aggregate contains organic impurities it may not be suitable for inclusion in concrete. Organic impurities, usually tannic acid and its derivatives, may interfere with the chemical reactions of hydration. Impurities are more likely to be found in fine (sand) aggregate.

Model No. Desc
42-3000 Glass Bottle
42-3040 Colour Standard

If aggregate contains organic impurities it may not be suitable for inclusion in concrete. Organic impurities, usually tannic acid and its derivatives, may interfere with the chemical reactions of hydration. Impurities are more likely to be found in fine (sand) aggregate.

Sodium Hydroxide Solution

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• Pre-mixed working solution - ready to use.
• Prepared in accordance with ASTM and AASHTO specifications.

Supplied in one pint bottles, this pre-mixed working solution is used in the organic impurities test method for cement mortar or concrete.

Model No. Desc
42-3050 Sodium Hydroxide Solution

Organic Impurities Test

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• Meets ASTM and AASHTO specifications.
• Includes all items necessary to perform test.

The Organic Impurities Test is used to determine the presence of injurious organic compounds in sand to be used in cement mortar or concrete. The test serves as a warning that further tests of the sands are necessary before they are approved for use.

Model No. Desc
42-3050 Sodium Hydroxide Solution
42-3000A Round Graduated Bottle
42-3040 Colour Standard

Color Standard Chart

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The Color Standard Chart consists of five permanent glass color standards mounted on a pocket size plate.

Model No. Desc
42-3040 Colour Standard