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1		-Research.WebHome
	1	+Environmental Surveys.Research.WebHome

Author

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1		-XWiki.terraindex
	1	+XWiki.RoelofZwaan

Content

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23	23	The secondary fraction lies between 5 and 50 % of the same material. At 5% > 20% of the same material one can speak of a weak presence of the material. At 20%>50% of the same material one can speak of a strong presence of the material. There is a possibility to add a second secondary component, but that is also the maximum of secondary components that can be present.
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25		-== [[Gradation>>doc:Characteristics .Soil boundaries.WebHome]] ==
	25	+== [[Gradation>>doc:Environmental Surveys.Characteristics .Soil boundaries.WebHome]] ==
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27	27	When the material has abrupt transition into the primary or tertiary fraction the gradation is called weak. With a strong gradation the border between materials is less clear and the clast size changes gradually.
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35	35	= Tertiary =
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37		-This category is used for the indication of a strange or [[special component>>doc:Soil.Special components.WebHome]] present in the layer. In this category many residual materials are present, for example calcium and wood. The fraction present can range from 5 to 50%. At 5% > 25% of the same material one can speak of a weak presence of the material. At 25%>50% of the same material one can speak of a strong presence of the material. Organic components are not accounted in the tertiary category. For other materials present the samples need to be of at least class QM4. Further below some components are explained.
	37	+This category is used for the indication of a strange or [[special component>>doc:Environmental Surveys.Soil.Special components.WebHome]] present in the layer. In this category many residual materials are present, for example calcium and wood. The fraction present can range from 5 to 50%. At 5% > 25% of the same material one can speak of a weak presence of the material. At 25%>50% of the same material one can speak of a strong presence of the material. Organic components are not accounted in the tertiary category. For other materials present the samples need to be of at least class QM4. Further below some components are explained.
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39	39	== AC 16 base/ AC 16-22 base ==
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57	57	== Asbestos ==
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59		-Asbestos is a term used to refer to six naturally occurring silicate minerals. All are composed of long and thin fibrous crystals, each fiber being composed of many microscopic 'fibrils' that can be released into the atmosphere by abrasion and other processes. Asbestos is used to strengthen ceramic creations and in walls or roofs of houses. When one suspect the presence of asbestos in a decayed wall or roof one needs to select the 'Asbestos suspect material'-field. More on asbestos-sampling and other specification can be found on the following [[page>>doc:Characteristics .Samples .Asbestos.WebHome]].
	59	+Asbestos is a term used to refer to six naturally occurring silicate minerals. All are composed of long and thin fibrous crystals, each fiber being composed of many microscopic 'fibrils' that can be released into the atmosphere by abrasion and other processes. Asbestos is used to strengthen ceramic creations and in walls or roofs of houses. When one suspect the presence of asbestos in a decayed wall or roof one needs to select the 'Asbestos suspect material'-field. More on asbestos-sampling and other specification can be found on the following [[page>>doc:Environmental Surveys.Characteristics .Samples .Asbestos.WebHome]].
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61	61	== Asphalt or bitumen ==
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111	111	A porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air.
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113		-== [[Clay>>doc:Rock types.Sedimenten.Clay.WebHome]] ==
	113	+== [[Clay>>doc:Environmental Surveys.Rock types.Sedimenten.Clay.WebHome]] ==
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115	115	A stiff, sticky fine-grained earth that can be moulded when wet, and is dried and baked to make bricks, pottery, and ceramics.
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174	174	Any rock-forming mineral that has a specific gravity greater than 2.8 and that is generally dark in color.
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176		-== [[Detritus>>doc:Organic depositions.Detritus.WebHome]] ==
	176	+== [[Detritus>>doc:Environmental Surveys.Organic depositions.Detritus.WebHome]] ==
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178	178	Detritus is particles of rock derived from pre-existing rock through processes of weathering and erosion. Detritus can also be dead organic material.
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180		-== [[Dolerite>>doc:Rock types.Igneous rocks.Extrusive igneous rocks.Dolerite.WebHome]] ==
	180	+== [[Dolerite>>doc:Environmental Surveys.Rock types.Igneous rocks.Extrusive igneous rocks.Dolerite.WebHome]] ==
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182	182	Dolerite is an igneous rock with a silica amount of 48 till 52%. The minerals present in dolerite are: olivine, plagioclase, biotite, amphiboles and pyroxenes.
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184		-== [[Dy>>doc:Organic depositions.Dy.WebHome]] ==
	184	+== [[Dy>>doc:Environmental Surveys.Organic depositions.Dy.WebHome]] ==
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186	186	Type of soil formed in nutrient low waters which mainly consist of very fine sunken organic components.
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208	208	Gravel is a loose aggregation of rock fragments. Gravel is classified by particle size range and includes size classes from granule- to boulder-sized fragments. ISO 14688 grades gravels as fine, medium, and coarse with ranges 2 mm to 6.3 mm to 20 mm to 63 mm.
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210		-== [[Gypsum>>doc:Rock types.Salts.Gypsum.WebHome]] ==
	210	+== [[Gypsum>>doc:Environmental Surveys.Rock types.Salts.Gypsum.WebHome]] ==
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212	212	Gypsum is the common name for CaSO,,4,,·2 H,,2,,O and is present at places where the sea water is partly or totally dried up. These dried up areas form loose layers in between the other rocks. This type of rock is soluble in water and is formed close to halite and anhydrite. Gypsum breaks into rhombus shaped pieces.
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362	362	Unwanted or unusable material, substances, or by-products.
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364		-== [[Wood>>doc:Organic depositions.Wood.WebHome]] ==
	364	+== [[Wood>>doc:Environmental Surveys.Organic depositions.Wood.WebHome]] ==
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366	366	Wood is the hard fibrous material that forms the main substance of the trunk or branches of a tree or shrub, used for fuel or timber.
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