Blacktop Materials Engineering provides NATA accredited aggregate testing throughout Geraldton, the Midwest and regional Western Australia. Our experienced laboratory performs aggregate grading, particle shape testing, bulk density testing, moisture testing and aggregate compliance testing in accordance with Australian Standards and Main Roads Western Australia test methods.
Our laboratory has been assisting Western Australian construction projects since 2000, with over 40 years of management experience, and provides independent testing for projects ranging from local subdivisions through to major civil infrastructure.
Our aggregate testing services support:
- Civil contractors
- Local Government
- Main Roads projects
- Mining companies
- Consulting engineers
- Developers
- Earthworks contractors
- Concrete contractors
Supporting projects including:
- Civil construction
- Road construction
- Local government infrastructure
- Mining projects
- Industrial developments
- Commercial developments
- Residential subdivisions
- Remote construction projects
We provide aggregate testing throughout:
- Geraldton
- Midwest WA
- Pilbara
- Gascoyne
- Wheatbelt
- Goldfields
- Regional Western Australia
Our aggregate testing services support projects involving:
- Roadbase
- Subbase
- Crushed rock
- Sealing aggregates
- Concrete aggregates
- Drainage aggregates
- Railway ballast
Our NATA accredited aggregate testing services include:
Sampling of Aggregates – Representative sampling of aggregates in accordance with Australian Standards and Main Roads WA procedures to ensure test results accurately represent the source material.
WA 200.1 / AS 1141.3.1
Bulk Density Tests – Determines the bulk density and void characteristics of aggregates for production control, pavement design and material compliance.
AS 1141.4
Particle Size Distribution – Assesses aggregate grading to verify compliance with project specifications, Australian Standards and Main Roads WA requirements
WA 210.1 / AS 1141.11.1, AS 1141.12
Average Least Dimension (ALD) – Determines the average least dimension of aggregate particles for pavement design and sprayed sealing applications.
WA 215.1 / AS 1141.20.1, AS 1141.20.2
Flakiness Index – Measures the proportion of thin or flaky aggregate particles that may affect pavement performance and durability.
WA 216.1 / AS 1141.15
Moisture Content – Measures the moisture content of aggregates for production control, stockpile management and mix design.
WA 212.1, WA 212.2
Clay and fine Silt (settling method) – Determines the amount of clay and fine silt associated with aggregate materials that may affect construction performance.
AS 1141.33
Organic Impurities (Other Than Sugar) – Detects harmful organic contamination that may adversely affect aggregate performance in construction applications.
AS 1141.34
Can’t find the aggregate testing service you’re looking for? Contact our experienced team to discuss your project requirements or view our complete Scope of Accreditation.

Flakiness Index

Average Least Dimension

Particle Size Distribution

