🧪 SIEVE ANALYSIS — HOW DO ENGINEERS DETERMINE AGGREGATE PARTICLE SIZE?

Sieve analysis is a laboratory test used to determine the particle-size distribution of granular materials such as sand and coarse aggregates.
The results help engineers understand whether an aggregate meets the specified grading requirements.

🔹 Basic Test Procedure

1️⃣ Obtain a representative aggregate sample.
2️⃣ Dry and prepare the sample according to the applicable standard.
3️⃣ Arrange a series of sieves with specified openings.
4️⃣ Place the sample on the sieve stack.
5️⃣ Sieve the material using the prescribed procedure.
6️⃣ Weigh the material retained on each sieve.
7️⃣ Calculate the percentage retained and percentage passing.

🔹 Why Is It Important?

✅ Helps assess aggregate grading.
✅ Supports concrete mix design.
✅ Helps identify grading problems.
✅ Provides information for quality control.

📌 Aggregate grading influences workability, packing, and the proportions required in a mix.

However, sieve analysis alone does not determine overall aggregate quality.

📘CONSTRUCTION MATERIALS TESTING MANUAL

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✅ ለCivil እና Material Engineers
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✅ ለ COTEM እና Civil Engineering Students

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