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Materials Testing

Asphalt & Bitumen

We ensure the integrity and longevity of roads and highways nationwide.

Our accredited facilities perform full Marshall control testing, MMLS and a wide range of asphalt, bitumen and road-readiness service according to any standard you require.

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Asphalt & Bitumen

Asphalt & Bitumen

SERVICE OFFERING

01


Marshall Stability, Flow and Quotient

Used to determine the stability and flow of compacted asphalt briquettes with an electronic plotter.

02


Bulk density and void content

Known as BRD, this test determines the density of the hot mix asphalt mix after compaction.

03


Gyratory Compaction

Used for precision compaction of asphalt samples to a specific target mixture or void content for determining mixture compatibility and mixture design properties.

04


Walking profilometer

A test to evaluate the surface condition of pavement at true walking speed. Measures surface roughness, texture and transition irregularities and surface rutting.

05


Falling Weight Deflectometer (FWD)

The Falling Weight Deflectometer (FWD) is currently the most practical system for accurately measuring a pavement’s deflection response when it is subject to a dynamic load.

06


International Roughness Index (IRI)

This test uses 3D laser sensors to measure surface roughness, texture and rutting. These values can be used to calculate ride comfort, surface friction and surface noise generation to international standards.

07


Model Mobile Load Simulator (MMLS 3)

By applying realistic rolling wheel contact stress in the laboratory, we can simulate traffic, moisture and temperature effects on a pavement layer, recreating real-life stresses.

08


Hamburg Abrasion Testing

Laboratory specimens or field samples can be tested under simulated conditions to determine their susceptibility to rutting and moisture against different load, temperature and moisture settings.

09


Rolling straight edge

This method is used to determine the rideability of a specific road surface area and measure the transition between where processed sections join.

10


Theoretical Maximum Specific Gravity

A hot mix asphalt sample is placed into a pycnometer and a vacuum pump removes all air from the sample to determine the mix density.

11


Soluble binder content and particle size analysis

Used to determine the percentage of binder in the hot mix asphalt sample. Sample is washed and processed to ensure no aggregate material is lost.

12


Bitumen content of asphalt mix

Used to determine the percentage of binder in the hot mix asphalt sample. Bitumen is burned off and the subsequent weight is then compared to the starting weight to determine the loss.

13


Binder content of mixtures

This method is used to accurately determine the net bitumen content of a slurry mixture.

14


Low- temperature and dynamic viscosity

Viscosity is the measure of resistance of flow or shear of a fluid. This test is used to determine the shear-rate and apparent viscosity of bitumen.

15


Rolling thin film oven

Measures the effects of heat and air on bitumen, simulating the hardening properties of bituminous binders during the mixing, transportation and compacting process.

16


Elastic recovery

This test method is used to determine the elastic properties of a polymer modified bituminous binder.

17


Ball penetration and resilience

This test measures the relative hardness or consistency of bitumen rubber blends.

18


Compression recovery

Used to measure the contribution made by the rubber crumbs to the bitumen rubber blend’s ability to return to its original shape after compression.

19


Flow test

This test is used to measure the flow properties of bitumen at high temperatures.

20


Ball penetration test

The ball penetration test is used to simulate the embedment of stone chips that occurs during construction and under traffic loading.

21


Texture depth measurement

This test is used to determine the texture of a road surface, also known as the roughness.

22


Marvil test

The permeability of a bituminous layer provides an indication of the interconnectivity of the voids in the layer, giving an indication of the material’s susceptibility to the ingress of water.

23


Certification of a binder distributor

Certification of a binder distributor (BT 20), validation of binder distributor dipstick (BT 21), power and speed indicator test (BT 22), pump system performance (BT23) and transverse distribution (bucket test) (BT 24).

24


Penetration of bituminous materials

The needle penetration test is used as a measure of the consistency of bituminous materials. Higher values of penetration indicate softer consistency.

25


Softening point of bitumen

Bitumen is without sharply defined melting points. The softening point is useful in the classification of bitumen as one element in establishing the uniformity of receiving shipments of binder.

26


Water content

This test method measures the amount of water present in the emulsified asphalt as distinguished from either bitumen or petroleum solvent.

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