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LBLJ-1520 Electric Impact Toughness Testing Machine (for ballast and aggregates)

Name: LBLJ-1520 Electric Impact Toughness Testing Machine (for ballast and aggregates)
Brand: Laibote (Tianjin) Testing Machinery
Availability: InStock

This instrument is used to determine the impact value of coarse aggregates for pavement, such as crushed stone and gravel, thereby assessing the aggregate’s ability to resist sudden impacts or collisions. Structure: The ballast impact toughness testing machine consists primarily of the following components: a release button; an adjustment button; a handle; a hook; an impact hammer; a vertical column; an impact cup; and a base.

Category:

Pavement, Subgrade, and Aggregate Testing Equipment

Keywords:

E-mail:

lbt@lbt.ltd

WhatsApp:

+86-15102211717

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LBLJ-1520 Electric Impact Toughness Testing Machine (for ballast and aggregates)

Description

Product Introduction:

This instrument is used to determine the impact value of coarse aggregates for pavement, such as crushed stone and gravel, in order to assess their ability to resist sudden impacts or impacts.

Structure:

The ballast impact toughness testing machine consists primarily of the following components: a release button, an adjustment button, a handle, a hook, an impact hammer, a vertical column, an impact cup, and a base.

Technical Specifications:

Part Name	Specifications and Parameters
Graduated cylinder	Inner diameter 76 mm, inner height 51 mm, wall thickness 3 mm.
Impact rod	A circular steel cylinder with an inner diameter of 102 mm and an inner height of 50 mm, whose inner surface has undergone tempering treatment.
Tamping rod	Steel rod, diameter 10 mm, length 23 mm, with hemispherical ends.
Impact hammer	Weight: 14.0–13.5 kg; lower cylindrical section diameter: 100 mm; bottom edge chamfered at 1.5 mm; surface hardened.
Drop height of the impact hammer	380±5mm
Power supply	380V 50Hz

Test method:

1. Sample preparation: Sieve 1 kg of aggregate to retain particles passing through a 15 mm sieve but retained on a 10 mm sieve; air-dry or oven-dry the sample at a temperature not exceeding 100°C for no more than 4 hours.

2. Filling the specimen: Use a scoop to transfer one-third of the aggregate into the cylinder, ensuring the material is loaded no more than 50 mm below the cylinder’s top. Compact the aggregate 25 times using the rounded end of the tamping rod, allowing each tamp to fall freely from a height not exceeding 50 mm above the cylinder’s top, with the point of impact evenly distributed across the aggregate surface. Repeat this procedure three times, remove any excess aggregate, and add additional aggregate to fill any remaining voids.

3. Weighing: Pour the aggregate completely filled in the graduated cylinder onto the balance to determine its mass (mass m, recorded to 0.1 g); use the same mass for the second test.

4. Pouring the material: Transfer the aggregate from the graduated cylinder into the metal cup mounted on the machine base, and compact it by striking it 25 times with the tamping rod to ensure proper compaction.

5. Hammering: Allow the hammer to fall freely from a height of 380 ± 5 mm onto the aggregate, and perform 15 consecutive blows. The interval between each blow shall be no less than 1 second. *After hammering, the specified drop height shall not be adjusted further.

6. Sieving and Weighing: Transfer the crushed aggregate from the cup onto a clean tray, then tap the outside of the metal cup with a rubber hammer and brush the inner surface with a stiff-bristled brush until all fine particles have fallen onto the tray. Pour the crushed aggregate onto a 2.5 mm sieve and sieve it until no further significant increase in weight is observed within one minute. Weigh the material passing through the 2.5 mm sieve and the material retained on the 2.5 mm sieve on an analytical balance to the nearest 0.1 g, denoting these weights as m1 (under‑sieve) and m2 (on‑sieve), respectively. If m1 + m2 exceeds m + 1 g, the results shall be deemed invalid.

7. Re‑testing: Use another sample of the same quality as in the first test and repeat the entire procedure.

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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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It measures heat deflection temperature and Vicat softening temperature of plastics, hard rubber, nylon, insulating materials and fiber-reinforced thermosetting composites. Intelligent temperature control guarantees precise heating rate, ideal for plastic raw material incoming inspection and formula development in plastic factories.

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

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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.”

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

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

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“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.”

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.”

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