05/08/2026
Whether constructing highways, airport runways, bridges or commercial buildings, aggregates make up the largest volume of most concrete and pavement structures. Their quality directly influences durability, strength and long-term performance.
In South Africa, aggregates must withstand:
Heavy freight transport
High axle loads
Temperature fluctuations
Seasonal rainfall
Long-term weathering
Laboratory testing verifies that aggregates meet engineering specifications before they are incorporated into construction.
Typical laboratory evaluations include:
Particle Size Distribution (Grading)
Aggregate Crushing Value (ACV)
10% Fines Aggregate Crushing Test
Flakiness Index
Water Absorption
Relative Density
Soundness and Durability Testing
Poor-quality aggregates can result in premature pavement failure, rutting, cracking, reduced concrete strength and costly maintenance.
Engineering Insight: Concrete and asphalt are only as reliable as the aggregates used to produce them. Test before you build, contact Igneous Soil Laboratory today.