IANZ accredited labs specialising in concrete, aggregates and civil engineering applications.

Testing Services


Our labs offer testing for both fresh and hardened ready-mixed concrete as well as onsite sampling and trial batch mixing. We use the latest in automatic concrete test machines, delivering greater consistency in test results. Our test frames can accommodate a large range of sizes and shapes.

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Because we’re quarry operators we understand your challenges. We can provide you with advice on what specifications you need to conform to, the testing you need to do, and how you need to do it. We know how to package up your quality control and advise you on how to go about ensuring your products are tested and compliant ready for sale.

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We provide testing for civil engineering applications including soil testing, earthworks compaction control, and masonry and segmental paver testing. Whatever your testing requirements, our team can help with an IANZ accredited solution.

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Our Team

We have an experienced team who have been part of the aggregates and concrete sector for decades. We’re committed to innovation and the industry, and we work to support the aggregates sector. We represent Stevenson on a range of organisations including the Aggregate and Quarry Association (AQA) and various transport infrastructure committees.

IANZ Accreditation

Our expertise is backed by over 40 years of proven industry experience. In 1975, we obtained IANZ accreditation (formally known as TELARC), and became one of the first non-Government owned certified civil engineering testing laboratories in New Zealand.

IANZ accreditation is formal recognition that our laboratory and its staff have been independently assessed and are deemed capable of performing tests to the requirements of national and international standards for which it is registered. For a copy of our IANZ Scope of Accreditation click here.



AQA announces new chair

01 September 2021

Stevenson Technical Manager Jayden Ellis has been elected to the position of incoming chair of the AQA (Aggregate and Quarry Association of New Zealand).

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Next Steps

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