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Samenvatting Materiaalleer (1018FOWIAR) Kunststeen
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Samenvatting materiaalleer hoofdstuk 4: kunststeen Combinatie van ppt en notities
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KunststeenI. Inleiding
1. Definitie
Steen die door de mens vervaardigd wordt (keramisch materiaal)
2. Soorten
o Gebakken (vb.: baksteen)
o Bindmiddelproducten
II. Bindmiddelproducten
1. Wat wordt er gebonden
o Kalkhoudende bindmiddelen + toeslagmaterialen + vulstoffen + hulpstoffen
o Toeslagmaterialen: granulatenzand, grind, gebroken natuursteen, steenpuin
2. Waarom
o Individuele bouwelementen maken
o Bouwelementen aan elkaar binden
3. Terminologie
o Pasta/ specie = niet-droog of niet-verhard binmiddelproduct
o Cementsteen, mortel of beton(steen) = verhard bindmiddelproduct
4. ‘Onderdelen’
o Inerte bestanddelen (granulaten) vormt skelet
o Bindmiddel (verharde cementpasta) = weefsel
5. Soorten
o Mortels
o Gipselementen
o Elementen met hydraulische kalk
o Betonsoorten
III. Bindmiddelen
1. Onderverdeling
| YM
, o Hydraulische: water nodig voor verharding
Hydratatieproces: Chem. verhardingsreactie tussen water en cement
Cement + water = cementpasta/lijm cementsteen
Cement + water + fijn toeslagmateriaal mortel
Cement + water + fijne en grove toeslagstoffen beton(steen)
Fc Beton: na 28 dagen
o Niet-hydraulische: geen water nodig voor verharding
Verharding door koolzuur in de lucht
Wel water nodig voor bewerkbaarheid van de specie
2. Soorten
o Cement
Anorganisch poeder
Voornamelijk calciumwaterstofsilicaat
o Gips
Calciumsulfaat
o Kalk
Geblust
( CaO + H2O Ca(OH)2 )
Calciumoxide
Calciumcarbonaat
Ongeblust
Calciumoxide
Calciumcarbonaat
IV. Toeslagmateriaal – granulaten - indeling
1. Afmeting
o Fijn: 0 – 4 mm zand
o Grof: 4 – 32 mm grind
| YM
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