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LBTL-2 Fine Aggregate Methylene Blue Tester

This instrument is a specialized device designed in accordance with the Ministry of Transport’s T0349-2005 standard, “Methylene Blue Test for Fine Aggregates.” It incorporates advanced frequency‑modulation and CNC technologies, enhancing both the accuracy and speed of testing. It is an essential piece of equipment for laboratory use. This method is applicable to determining the presence of expansive clay minerals in fine aggregates and to quantifying their content, thereby assessing the cleanliness of the aggregate; the result is expressed as the methylene blue value (MBV). The method is suitable for fine aggregates passing through 2.36 mm or 0.15 mm sieves and can also be used for quality control of mineral fillers. When the percentage of material passing the 0.075‑mm sieve is less than 3%, this test may be waived, and the aggregate shall be considered compliant.

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Pavement, Subgrade, and Aggregate Testing Equipment

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lbt@lbt.ltd

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LBTL-2 Fine Aggregate Methylene Blue Tester

Description

Product Introduction:

This method is applicable for determining the presence of expansive clay minerals in fine aggregates and for quantifying their content, thereby assessing the cleanliness of the aggregate, as expressed by the methylene blue value (MBV).

This method is applicable to fine aggregates with particle sizes less than 2.36 mm or less than 0.15 mm, and may also be used for the quality inspection of mineral fines. When the percentage of material passing the 0.075‑mm sieve in the fine aggregate is less than 3%, this test need not be performed, and the material may be deemed acceptable.

Technical Specifications:

Parameter item	Specific information
Power supply voltage	220V
Maximum rotational speed	600 rpm ± 10 rpm
Minimum rotational speed	400 rpm ± 10 rpm
Impeller diameter	75mm±10mm
Number of impellers	3 pieces
Beaker volume	1000mL
External dimensions	500×330×320mm
Instrument net weight	20kg

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FAQs

Do you supply full-set testing instruments for asphalt and geotechnical engineering projects?

We offer complete lab solutions including asphalt viscosity tester, asphalt rutting tester, geotextile permeability tester, low-temperature flexibility tester and concrete/cement test equipment, covering raw material detection for road, water conservancy and construction engineering projects

Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

We provide non-standard customization of test equipment and customized fixture clamps according to customers’ specimen size and test standards. All our testing machines enjoy 12-month factory warranty; overseas customers get remote online debugging guidance, spare parts supply and technical operation training. Our products have been exported to over 70 countries globally

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Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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LBTL-2 Fine Aggregate Methylene Blue Tester

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