A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cellulose modified fibres in cement based composites
The objective of the present work is to evaluate the effect of surface modification of cellulose pulp fibres on the mechanical and microstructure of fibre-cement composites. Surface modification of the cellulose pulps was performed with Methacryloxypropyltri-methoxysilane (MPTS) and Aminopropyltri-ethoxysilane (APTS) in an attempt to improve their durability into fibre-cement composites. The surface modification showed significant influence on the microstructure of the composites on the fibre-matrix interface and in the mineralization of the fibre lumen as seen by scanning electron microscopy (SEM) with back-scattered electron (BSE) detector. Accelerated ageing cycles decreased modulus of rupture (MOR) and toughness (TE) of the composites. Composites reinforced with MPTS-modified fibres presented fibres free from cement hydration products, while APTS-modified fibres presented accelerated mineralization. Higher mineralization of the fibres led to higher embrittlement of the composite after accelerated ageing cycles. These observations are therefore very useful for understanding the mechanisms of degradation of fibre-cement composites.
Cellulose modified fibres in cement based composites
The objective of the present work is to evaluate the effect of surface modification of cellulose pulp fibres on the mechanical and microstructure of fibre-cement composites. Surface modification of the cellulose pulps was performed with Methacryloxypropyltri-methoxysilane (MPTS) and Aminopropyltri-ethoxysilane (APTS) in an attempt to improve their durability into fibre-cement composites. The surface modification showed significant influence on the microstructure of the composites on the fibre-matrix interface and in the mineralization of the fibre lumen as seen by scanning electron microscopy (SEM) with back-scattered electron (BSE) detector. Accelerated ageing cycles decreased modulus of rupture (MOR) and toughness (TE) of the composites. Composites reinforced with MPTS-modified fibres presented fibres free from cement hydration products, while APTS-modified fibres presented accelerated mineralization. Higher mineralization of the fibres led to higher embrittlement of the composite after accelerated ageing cycles. These observations are therefore very useful for understanding the mechanisms of degradation of fibre-cement composites.
Cellulose modified fibres in cement based composites
Tonoli, G.H.D. (author) / Rodrigues Filho, U.P. (author) / Savastano, H. jun. (author) / Bras, J. (author) / Belgacem, M.N. (author) / Rocco Lahr, F.A. (author)
2009
8 Seiten, 9 Bilder, 3 Tabellen, 34 Quellen
Conference paper
English
Cellulosefaser , chemische Oberflächenbehandlung , Elektronenbeugung , energiedispersive Röntgenspektrometrie , Fasereigenschaft , Hydratation , künstliches Altern , mechanische Spannungsverteilung , Mikrostruktur , Mineralisierung , Oberflächenmodifizierung , Organosilan , Portlandzement , Rasterelektronenmikroskopie , Rückstreuung , Tauchprüfung , Versprödung , Zellstoffbrei
Cellulose modified fibres in cement based composites
| British Library Online Contents | 2009
| British Library Conference Proceedings | 1997
Cement Composites Reinforced with Vegetable Fibres
| Springer Verlag | 2011