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Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge
Thesis (MScFor)--Stellenbosch University, 2004.
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| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2012
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| _version_ | 1867613915150548992 |
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| access_status_str | Open Access |
| author | Mostert, F. |
| author2 | Gerischer, G. F. R. |
| author_browse | Gerischer, G. F. R. Mostert, F. |
| author_facet | Gerischer, G. F. R. Mostert, F. |
| author_sort | Mostert, F. |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MScFor)--Stellenbosch University, 2004. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/49988 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:43:43.080Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/49988 Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge Mostert, F. Gerischer, G. F. R. Stellenbosch University. Faculty of AgriSciences. Dept. of Forest and Wood Science. Fiberboard Paper industry -- By-products Composite materials Cement composites Thesis (MScFor)--Stellenbosch University, 2004. ENGLISH ABSTRACT: This research focuses on the utilisation of de-inking sludge from a tissue mill to produce a wood-fibre inorganic composite called the Deviro panel. The study is based on the SA provisional patent 95/9594 by Ysbrandy and Gerischer' and the further research conducted by Crafford'. The patented Deviro panel contains up to 70% de-inking sludge. Cement and a cement extender serve to fortify the composite. The panel's fibre content of 25-30% is significantly greater than encountered in commercial fibre inorganic composites which contain 8-12% fibre by weight. The physico-mechanical characteristics of the Deviro panel compare favourably with resin bonded wood-fibre composites, but less favourably compared to conventional wood and wood-fibre inorganic composites. These properties are strongly dependent on panel density. For instance flexural strength being directly proportional while dimensional stability and hygroscopicity being inversely proportional to density. After confirming the results from the preceding work by Crafford, further improvements were investigated through chemical and curing enhancements. For instance, an autoclaving treatment during the curing period showed an increase in flexural strength. Addition of water glass could be associated with bulking of the panel, which resulted in increased flexural strength and a slight reduction of density. Panel density could be significantly reduced by the addition of Perlite, while inhibiting the concomitant reduction in strength. In addition a pilot production process was developed to produce 1m2 panels, which exhibited similar curing characteristics as the smaller panel units. AFRIKAANSE OPSOMMING: Hierdie navorsing handeloor die gebruik van ontinkingsslyk van 'n sneespapier meule om die Deviro paneel, 'n houtvesel anorganiese saamgestelde produk, te produseer. Die studie volg uit die SA voorlopige patent 95/9594 deur Ysbrandy en Gerischer en verdere narvorsing deur Crafford'. Die gepatenteerde Deviro paneel bevat tot 70% ontinkingsslyk. Sement en sement-byvoegmiddels dien om die saamgestelde produk te versterk. Die paneel bevat 25-30% vesel wat aansienlik meer is as ander kommersiële anorganiese saamgestelde produkte wat 'n vesel inhoud van 8-12% het. Die megamese eienskappe van die Deviro paneel is vergelykbaar met houtvesel saamgestelde produkte waar hars as kleefiniddel dien, maar vergelyk minder gunstig teenoor konvensionele hout en houtvesel anorganiese saamgestelde produkte. Die paneel se eienskappe is afhanklik van sy digtheid Buig sterkte is eweredig terwyl dimensionele stabiliteit en hygroskopisiteit omgekeerd eweredig aan die digtheid van die paneel is. Die voorafgaande werk van Crafford is eers gestaaf voordat veranderinge aan die chemiese samestelling en drogingsmetodes van die paneel nagevors is. Daar is byvoorbeeld bevind dat, deur die paneel te outoklaveer gedurende die set periode, dit lei tot 'n toename in buig sterkte. Die byvoeging van water glas kan swelling laat plaasvind wat 'n afname in buig sterkte en 'n afname in digtheid tot gevolg het. Digtheid kan ook aansienlik verlaag word deur die byvoeging van Perlite terwyl 'n dienooreenkomstige verlaging in buig sterkte tot 'n mate voorkom word. 'n Loods produksie proses is ook ontwikkel om 'n 1m2 paneel te vervaardig wat dieselfde eienskappe toon as die kleiner paneel. Masters 2012-08-27T11:33:11Z 2012-08-27T11:33:11Z 2004-04 Thesis http://hdl.handle.net/10019.1/49988 en_ZA Stellenbosch University 138 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Fiberboard Paper industry -- By-products Composite materials Cement composites Mostert, F. Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title | Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title_full | Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title_fullStr | Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title_full_unstemmed | Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title_short | Improving the Deviro panel : technical enhancements of a wood fibre-cement composite from paper mill de-inking sludge |
| title_sort | improving the deviro panel technical enhancements of a wood fibre cement composite from paper mill de inking sludge |
| topic | Fiberboard Paper industry -- By-products Composite materials Cement composites |
| url | http://hdl.handle.net/10019.1/49988 |
| work_keys_str_mv | AT mostertf improvingthedeviropaneltechnicalenhancementsofawoodfibrecementcompositefrompapermilldeinkingsludge |