Aggregate Testing

Aggregates form the skeleton of concrete and mortar, occupying approximately 70% of their volume. Their quality directly determines the strength, durability, volume stability, and ultimately the safety and service life of the entire engineering project. With the increasing scarcity of natural sand and gravel resources and stricter environmental policies, alternative materials such as manufactured sand (mechanism sand) and recycled aggregates are becoming more widely used. This poses new and more complex challenges for the quality control of aggregates.

Testing Products

Sand (Fine Aggregate)

Stone (Coarse Aggregate)

Testing Items

Apparent Density

Loose Bulk Density

Compacted Bulk Density

Void Ratio (Voids Content)

Clay, Silt and Dust Content

Clay Lump Content

Lightweight Material Content

Shell Content

Chloride Content

Soundness

Organic Matter Content

Alkali-Aggregate Reactivity (AAR)

Sulfide and Sulfate Content

Mica Content

Sieve Analysis (Particle Size Distribution/Grading)

Rock Compressive Strength

Crushing Value (Aggregate Crushing Value)

Flat and Elongated Particle Content

Stone Powder Content (Fine Content)

Water Absorption

Testing Standards

Sand (Fine Aggregate) – Natural sand, manufactured sand: GB/T 14684-2022

Stone (Coarse Aggregate) – Crushed stone, iron ore stone: GB/T 14685-2022

Service Advantages

1.  Comprehensive testing parameters, with experience in nuclear power project testing.

2.  Extensive knowledge and experience in testing related aggregate products such as sea sand and washed sand.


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