Aggregate Stockpiles: How to Prevent Segregation and Contamination
Good material can fall out of specification in a poor stockpile. Learn why segregation happens and how to build, load and protect a stockpile.
Based on pavement design
Foundations & Earthworks
Foundations and earthworks
Granular layers under a structure spread load and provide a stable working platform.
The role of materials in Foundations and earthworks
Before a structure or industrial floor is built, natural ground must become a stable, compactable surface. Graded aggregates play this part in sub-layers and engineered fills.
Material selection here depends on ground conditions, groundwater level and design load, and is specified in the project design.
Selection criteriaWhat matters
Three deciding criteria
- 1
Compactability
Continuous grading, to reach the required density with less energy.
- 2
Drainage
Good permeability, to stop moisture staying in the sub-layers.
- 3
Layer stability
Sound particles that do not crush under plant traffic.
Related productsMaterials
Materials commonly used for Foundations and earthworks
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Based on pavement design
Base material
Continuously graded crushed mix for the load-bearing layer under the surface.Specifications and uses
Sized by design
Rubble stone
Irregular stones for foundations, retaining walls, aprons and stone structures.Specifications and usesProduction and processing
Sand and gravel industry
Converting Tonnes and Cubic Metres: Bulk Density and Sand Bulking
The weight and volume of materials change with compaction and moisture. Learn bulk density, the bulking of damp sand and how to estimate sand and gravel quantities.
Industrial applications
Base and Subbase: How Granular Layers Decide Pavement Life
Base and subbase layers spread traffic loads into the subgrade. Learn how the two layers differ, what their materials need and the key points of placing them.
Quarrying and extraction
Stages of Operating a Stone Quarry: From Exploration to Land Restoration
Operating a stone quarry is a multi-stage process. Review exploration, planning, benched extraction, haulage and restoration of the land.
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