Electric Sand Equivalent Tester Fine Aggregate Cleanliness 90/30s Piston Method

Product Features & Attributes
This electric sand equivalent tester is used to determine the clay or impurity content in fine aggregates (natural sand, manufactured sand, stone dust, particle size ≤4.75mm) to evaluate aggregate cleanliness. It is important testing equipment for asphalt mixture and concrete sand quality control.

Working Principle: After mixing the sample with flushing solution, electric oscillation separates clay and fine impurities from aggregate surfaces, suspending them in the solution. After settling, the piston measures sediment height (h2) and total flocculent height (h1), calculating the sand equivalent value (SE = h2/h1 × 100%). Higher SE values indicate cleaner aggregates.

Structure:

• Electric oscillator: 90 times/30s, amplitude 203mm, automatic timing

• Weighted piston: 1kg±5g for sediment height measurement

• Plastic cylinder: ID Φ32±0.25mm, height 420±0.25mm

• Rinsing tube: OD Φ6±0.25mm, ID Φ4±0.2mm

• Fixed test tube rack

Technical Features:

• Electric oscillation with stable frequency and accurate timing (30s/time)

• Precision weighted piston (1kg±5g) for reliable results

• Precise cylinder dimensions meeting requirements

• Easy operation with automatic timing control

• Suitable for natural sand, manufactured sand, stone dust and other fine aggregates

Test Environment Requirements:

• Testing must be performed on a vibration-free level platform

• Rinsing solution temperature maintained at 20±2℃

• Avoid direct sunlight exposure to plastic cylinder

Applications:

• Fine aggregate quality testing for asphalt mixtures

• Sand cleanliness evaluation for concrete

• Highway engineering aggregate testing

• Building material quality inspection

Available in different specifications: different oscillation frequencies (90/30s, custom), different amplitudes (203mm, custom), and different cylinder sizes to suit various fine aggregate types and testing standards.

Mainly used in highway engineering testing institutions, asphalt mixture laboratories, concrete batching plants, building material testing institutions, research universities, and more for fine aggregate sand equivalent testing.