Civil Engineering Testing Laboratory ¡¤ SANAS T1018
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Public test guide

Organic impurities in fine aggregate

Screens sand for organic matter that may interfere with cement hydration or concrete performance.

Plain-language explanation

What the test tells you.

The project specification controls the exact method and acceptance requirement.

01

What it is

Fine aggregate is mixed with the specified solution and the developed colour is compared with a standard.

02

What is used

Fine aggregate, test bottle, specified solution and colour reference.

03

What it determines

Whether the colour response exceeds the method’s screening reference.

04

Why it matters

Identifies material that may require further assessment before use in concrete or mortar.

Typical test sequence

From sample
to result.

  1. 01

    Prepare the sand and solution in the test container

  2. 02

    Shake and allow the mixture to stand

  3. 03

    Compare the colour with the prescribed reference

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Need organic impurities in fine aggregate?

Send the project, sample quantity, location and required completion date.
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