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dc.contributor.authorBernhardt, Markus
dc.contributor.authorJustnes, Harald
dc.contributor.authorTellesbø, Hilde
dc.contributor.authorWiik, Kjell
dc.date.accessioned2017-10-31T10:12:34Z
dc.date.available2017-10-31T10:12:34Z
dc.date.created2014-07-26T16:20:34Z
dc.date.issued2014
dc.identifier.citationCement & Concrete Composites. 2014, 53 (Oct), 233-238.nb_NO
dc.identifier.issn0958-9465
dc.identifier.urihttp://hdl.handle.net/11250/2463119
dc.description.abstractIn an attempt to improve the properties, lightweight aggregates were produced from clay with the addition of Na2CO3, SiO2, Fe2O3, and Fe in quantities between 2 and 10 wt% and examined with respect to strength, density and expansion behavior. The additives were mixed into dry clay powder, water was added and pellets were formed by hand and fired at 1120 °C in a chamber furnace. Particle densities of the products ranged from 0.31 to 0.57 g/cm3, porosities from 78% to 89% and the solid strength from 0.54 to 1.58 MPa. The addition of Na2CO3 proved to decrease the viscosity of the glass phase at the surface of the pellets but resulted in a reduced expansion, irregular shape and pellets sticking together. SiO2 addition did not give any major change in properties. The addition of Fe2O3 increased the pore size in the center of the pellets, however with insignificant change in strength and density. Adding 5 wt% metallic iron powder led to LWA pellets with increased porosity, reduced density, larger pores and low mechanical strength and could be a useful additive in applications where low density is more important than strength.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleThe effect of additives on the properties of lightweight aggregates produced from claynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber233-238nb_NO
dc.source.volume53nb_NO
dc.source.journalCement & Concrete Compositesnb_NO
dc.source.issueOctnb_NO
dc.identifier.doi10.1016/j.cemconcomp.2014.07.005
dc.identifier.cristin1144391
dc.description.localcode© 2014. This is the authors’ accepted and refereed manuscript to the article. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,66,35,0
cristin.unitnameInstitutt for materialteknologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal