30/09/2026
🏡 What’s underneath matters.
When you drive through a new housing estate, you see homes, roads, footpaths and landscaping.
What you don’t see is the investigation and testing that happened before they were built.
That’s where HiQA comes in.
Before construction starts, a geotechnical investigation can involve drilling or excavating test locations, collecting soil samples and laboratory testing to understand the ground conditions below the surface. This information helps engineers assess the site and make informed decisions about earthworks, roads, foundations and construction requirements.
🚧 A roller went over it, so it’s compacted, right?
Not necessarily. During construction, soil is placed in layers and compacted. HiQA technicians carry out field density and moisture testing to determine whether it has achieved the required level of compaction.
Laboratory testing determines the material’s Maximum Dry Density (MDD) and Optimum Moisture Content (OMC), allowing us to calculate a Density Ratio. The result gives the project team measurable evidence of how well the material has been compacted against the project requirements.
For roads, testing continues through the pavement layers, checking material quality and compaction as each layer is constructed. These layers form the foundation of the completed road, whether it is left unsealed or finished with a sprayed seal, asphalt or concrete pavement.
For homes, geotechnical investigations and soil testing help determine how the ground may behave, including its potential to shrink or swell as moisture conditions change. These results contribute to the site classification, which provides engineers with important information when designing a suitable footing and slab system for the ground conditions.
🏗️ Then comes concrete.
HiQA technicians test fresh concrete, including slump testing to assess its consistency, then prepare concrete specimens for controlled curing. These specimens are later tested for compressive strength, providing results to confirm the concrete is performing against the specified requirements.
🔍 Why do we test? Construction quality shouldn’t rely on assumptions.
“The ground looks compacted.”
Testing provides measurable evidence that the required compaction has been achieved.
“The concrete should be strong enough.”
Testing provides results to demonstrate whether the concrete meets the specified strength requirements.
Finding something that doesn’t meet the requirements is exactly why testing matters. It gives the project team the opportunity to address it before it gets built over.
By the time you drive along that road or move into your new home, most of our work is completely hidden. But what’s underneath still matters.
🧡 HiQA – We test what you build on.