The collection of materials does need to be cleaned under specific circumstances. The main purpose of cleaning the collected material samples is to remove surface impurities, dust, oil stains, etc., to ensure the accuracy and reliability of the test results. Here are some scenarios and corresponding cleaning methods for cleaning collected material samples:

First, use a 4.75mm aperture sieve to sieve the aggregate, and take a standard mass sample using the quartering method.

Place the sample in water for rinsing, being careful to avoid loss of aggregate particles. If the aggregate particles are large, they can be wiped individually. After rinsing, dry the sample to constant weight before proceeding with further tests.

Place the test sample in a drying oven at 105℃±5℃ until constant weight, and weigh the total mass of the dried aggregate sample.

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