pavement material and construction

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Pavement & Materials Overview

Pavement management is focussed on the optimisation of expenditure on the road pavement to meet budgetary requirements and user expectations. This requires a detailed knowledge of pavement behaviour throughout the pavement life-cycle.

In addition to our skills in pavement construction and design, and knowledge of pavement materials you can benefit from our extensive research and understanding of pavement deterioration processes (see ALF - the Accelerated Loading Facility), and our road asset data collection services.

Pavement and materials consulting services include:

optimum use of pavement materials
assessment of alternative materials
laboratory assessment of material performance
impact of heavy vehicles on pavement performance
accelerated pavement testing using the Accelerated Loading Facility (ALF)
new materials test procedures and guidelines.
Our expertise includes not only traditional asphalt pavements in urban environments but also low-cost unbound and spray seal pavements.

We can assist your organisation in the following pavement management areas:

implementation and development of pavement management systems (PMS)
pavement analysis and program development
implementation and application of HDM-4.
For more information on ARRB's long term pavement performance research, please visit arrb.com.au/ltpp/

Technical and strategic research program

Pavement technology research continues to focus on improving understanding of the response of flexible pavements to changing vehicle loads and new-generation heavy vehicles. Emphasis is being placed on unbound granular pavement materials.

Materials testing laboratories

ARRB Group have NATA accredited laboratories and equipment for testing the properties of materials in road pavements and concrete structures. We have facilities to test:

bitumen and binders
asphalt
concrete and structures
unbound materials
stabilised and recycled materials.

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Aggregate crushing test:
The aggregate crushing value provides a relative measure of resistance to crushing under
gradually applied crushing load. The test consists of subjecting the specimen of aggregate in
standard mould to a compression test under standard load conditions (Figure 1). Dry aggregates
passing through 12.5 mm sieves and retained 10 mm sieves are filled in a cylindrical measure of
11.5 mm diameter and 18 cm height in three layers. Each layer is tampered 25 times with at
standard tamping rod. The test sample is weighed and placed in the test cylinder in three layers
each layer being tampered again. The specimen is subjected to a compressive load of 40 tonnes
gradually applied at the rate of 4 tonnes per minute. Then crushed aggregates are then sieved
through 2.36 mm sieve and weight of passing material (W2) is expressed as percentage of the
weight of the total sample (W1) which is the aggregate crushing value.
A value less than 10 signifies an exceptionally strong aggregate while above 35 would normally
be regarded as weak aggregates.

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