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LBT-1B29 Liquid Crystal Asphalt Mixture Theoretical Maximum Relative Density Tester

It is applicable to the vacuum method for determining the theoretical maximum relative density of asphalt mixtures, and is used in asphalt mixture gradation design, pavement condition surveys, or pavement construction quality management to calculate voids content, compaction degree, and other parameters.

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Asphalt Mixture Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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LBT-1B29 Liquid Crystal Asphalt Mixture Theoretical Maximum Relative Density Tester

Description

L Product Introduction:

This instrument is designed and manufactured in accordance with the requirements specified in T0711‑2025, “Test for Theoretical Maximum Relative Density of Asphalt Mixtures (Vacuum Method),” as outlined in JTG 3410‑2025, “Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering,” issued by the Ministry of Transport of the People’s Republic of China. It is suitable for determining the theoretical maximum relative density of asphalt mixtures using the vacuum method, and is employed in asphalt mixture gradation design, pavement condition surveys, and quality management during pavement construction to calculate void content, compaction degree, and other parameters. However, it is not applicable to asphalt mixtures containing porous aggregates with an absorption rate exceeding 3%. The instrument can simultaneously perform parallel tests on two specimens, featuring a well‑thought‑out design, ease of operation, and high efficiency.

Product Features:

1. Utilizing microcontroller-based control technology, processes such as vacuuming, vibration, gas replenishment, and pressure relief are all performed automatically.

2. An absolute pressure sensor is employed, enabling the instrument’s negative-pressure chamber to achieve a vacuum of up to 3.7 kPa ± 0.3 kPa.

3. Equipped with a vacuum gauge, it can directly indicate the operating status of the vacuum pump.

4. Equipped with a water‑accumulation buffer device to prevent water from the negative‑pressure vessel from entering the vacuum pump.

5. It can simultaneously perform parallel tests on two samples, featuring a well‑designed structure, ease of use, and high efficiency.

Technical Specifications:

Parameter item	Parameter value
Power supply voltage	220V±10% 50Hz
Input power	Vacuum pump 160W, vibrator 30W
Negative pressure inside the vacuum vessel	3.7 kPa (27.75 mmHg), with an allowable deviation of ±0.3 kPa.
Work style	LCD screen control
Container volume	4000 ml × 2 pieces
Vibration mode	Continuous vibration
External dimensions	50×50×36cm
Weight	32kg

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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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Does your pipe pressure burst testing machine control test temperature automatically? What’s its main application?

Yes, the constant-temperature circulating system keeps stable test environment during long-time hydrostatic resistance and instant burst pressure measurement of thermoplastic pipes. It complies with GB6111 standard and serves raw material inspection, new product R&D for plastic pipe manufacturers, third-party testing labs and university laboratories.

What kinds of pipes fit your ring stiffness tester? Can it do long-term creep testing?

This equipment is designed for HDPE, PVC corrugated pipes, plastic drainage pipes and various plastic tubular products. Apart from ring stiffness, ring flexibility and flattening tests, it supports continuous long-term creep tests up to 1000 hours (42 days) as required by industry specifications, widely used for pipe factories and construction quality inspection institutes.

What test items can your WDW series computer-controlled electronic universal testing machine complete? Which international standards can it meet?

Our WDW universal tester is applicable for tension, compression, bending, shearing and peeling tests of metal, plastic, rubber and composite materials. It supports test procedures in accordance with GB, ISO, ASTM, DIN, JIS multiple domestic and global standards. Equipped with high-precision servo drive and dedicated test software, it automatically collects, calculates and exports test data including tensile strength, elongation at break and elastic modulus.

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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LBT-1B29 Liquid Crystal Asphalt Mixture Theoretical Maximum Relative Density Tester

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