Canadian Council of Independent Laboratories (CCIL) Practice Exam 2025 - Free CCIL Practice Questions and Study Guide

Question: 1 / 400

What sieve size must cementing materials pass through to reject lumps?

1.0mm or finer

1.25mm or finer

Cementing materials must pass through a sieve size of 1.25mm or finer to effectively reject lumps. This sieve size is crucial because it ensures that any agglomerated particles that may affect the quality of the material are eliminated. The presence of lumps can lead to inconsistent mixing or poor performance in various applications, such as in concrete or other construction materials. By using a sieve with a 1.25mm opening, the material is screened adequately to maintain the desired consistency and ensure that the remaining cementing materials are of a suitable size for optimal performance. This standard helps to uphold the integrity and quality of the final product in construction practices.

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1.5mm or finer

2.0mm or finer

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