Water Content

UKAS Accredited

Standard(s): BS 1377-2:2022
Lab Test
The water content test determines the amount of moisture present within an aggregate sample. Conducted in accordance with BS EN 1097-5:2008, the test measures the percentage of water relative to the dry mass of the aggregate. Understanding the moisture content is essential for controlling concrete and asphalt mix designs, as excess or insufficient moisture can significantly affect material performance.

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The Process

A representative aggregate sample is weighed and then dried in a controlled oven until it reaches a constant mass. The sample is weighed again after drying. The difference between the wet mass and dry mass is used to calculate the water content as a percentage of the dry mass of the aggregate.

The Reason

Aggregate moisture content influences the amount of water required in concrete or asphalt mixtures. If the moisture content is not accurately accounted for, it can lead to incorrect water-to-cement ratios, affecting strength, durability, and workability. Testing ensures accurate mix adjustments and consistent material performance.

The Application

Water content testing is commonly carried out for aggregates used in concrete production, asphalt mixtures, and general construction materials. The results allow contractors, batching plants, and engineers to adjust mix designs and maintain compliance with project specifications and quality requirements.

Frequently Asked Questions

Where can I get aggregate water content testing in the UK?

Amtest provides professional aggregate water content testing in accordance with BS EN 1097-5:2008. Samples can be delivered to our laboratory or arranged through site sampling services depending on project requirements.

How do I arrange aggregate water content testing with Amtest?

You can contact Amtest to arrange sample delivery or site collection. Our team will advise on sample quantities, testing requirements, and turnaround times to support your project schedule.

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Water Content

The Water Content test (BS EN 1097-5:2008) determines the amount of moisture present in aggregate materials. This aggregate testing method is essential for assessing material quality, ensuring accurate mix design, and maintaining consistency in concrete and asphalt production.

The test involves weighing a sample of aggregate before and after controlled drying to calculate the percentage of water it contains. Understanding the moisture content helps engineers and technicians adjust water–cement ratios, achieve the desired workability and strength, and ensure compliance with project specifications.

At Amtest UK, our laboratory performs Water Content testing to BS EN 1097-5:2008 as part of comprehensive aggregate quality control. The results provide reliable data for construction materials testing, mix proportioning, and on-site quality assurance, helping ensure durable and consistent performance in every project.

BS 1377-2:2022