Soil - Special components 

Page / - last modified by TerraIndex TerraIndex on 2021/09/30 15:19 

Special components 
last modified by TerraIndex TerraIndex
on 2021/09/30 15:19

Table of Contents

A layer consists of special components when more than half of its volume consists of special material. That material can be either natural or anthropogenic in nature. A layer consisting of special material is described less extensively than a layer that consists of soil or rock. Below the categories of special components and their descriptions can be found.
Unbroken concrete
Antropogenic material: concrete that is not classified as debris, for example, a concrete slab.
Geotextile
Antropogenic material: textiles and films used in ground improvement usually made of plastic.
Used wood
Antropogenic material: wood or woody material that has been used. Examples include rice mats, foundation piles, shoring, shipwrecks.
Charcoal
Antropogenic material: charred remains of wood due to combustion, usually broken pieces.
Garbage
Antropogenic material: unspecified household waste.
Human made chalk
Antropogenic material: lime-based human made material such as slaked lime or lime identifiable as an admixture.
Filler material with plastics
Antropogenic material: filler material with a low specific weight consisting mainly of plastics and similar plastics, with expanded polystyrene as an example.
Filler material with stones
Antropogenic material: filler material with a low specific weight consisting of man-made stony material.
Examples include bims, expanded clay pellets, flugsand foam concrete and foam glass.
Woody plant remnants
Natural material: the woody, undigested remains of plants, such as stems, branches and woody roots.
Not woody plant remnants
Natural material: the non-woody, undigested remains of plants, such as rootlets, cane stems and leaves.
Debris
Antropogenic material: construction and demolition waste, often a mixture of stony materials made or worked by man.
Mixture of soil
Antropogenic material: a mixture of the soil on site with a material such as cement or water glass. water glass itself is also included here.
Stones
Antropogenic material: stones of natural material that have been used as ballast or dump rock or are the by-product of mining operations.  
Combustion residues
Antropogenic material: mineral combustion residues with a diameter ranging from less than 63 µm to greater than 2 mm.
Fine combustion residues
Antropogenic material: mineral combustion residues with a diameter similar to that of silt and lutum (less than 63 µm).
Medium coarse combustion residues
Antropogenic material: mineral combustion residues with a diameter similar to that of sand (0.063 to 2 mm).
Coarse combustion residues
Antropogenic material: mineral combustion residues with a diameter greater than 2 mm.
Road surfacing material
Antropogenic material: material used for paving of roads and yards. Examples include asphalt, concrete pavers, crushed clinker stones and tiles.
Weathered boulders
Natural material: a boulder so weathered that the material is completely pulverized and can be pierced.
References
•	BRO-Catalogus Geologisch booronderzoek versie 0.99 – 25 maart 2020
Contents
•	Unbroken concrete
•	Geotextile
•	Used wood
•	Charcoal
•	Garbage
•	Human made chalk
•	Filler material with plastics
•	Filler material with stones
•	Woody plant remnants
•	Not woody plant remnants
•	Debris
•	Mixture of soil
•	Stones
•	Combustion residues
•	Fine combustion residues
•	Medium coarse combustion residues
•	Coarse combustion residues
•	Road surfacing material
•	Weathered boulders
•	References