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PVA polymer modified glass fiber reinforced cementitious composites

Li, Z. / Liu, A.C.P. / Leung, C.K.Y.

This report presents an experimental investigation an the effect of polyvinyl alcohol (PVA) polymer modified alkali resistance (AR)-glass fiber reinforced cementitious composites (GFRC). The performance of the alkali resistance glass fibres in blended cementitious matrix was evaluated by a series of tensile and flexural tests. Specimens with different amounts of PVA polymer were tested. Specimens under dry air and moist curing environment were compared. The results indicate that the addition of 2% (weight) PVA polymer Shows improvement in strength, toughness, ductility, and deflection. SEM studies indicated that PVA forms a thin film covering an the glass fibre surface, which inhibits the nucleation of calcium hydroxide crystals an the glass fibres surface and to enhance the formation of C-S-H during the hydration. The presence of PVA Shows the ability to reduce the embrittlement of the GFRC and changes the failure mode from brittle to ductile. EDAX results shows that the Ca/Si ratio in the fiber interface of the PVA modified specimens is greatly reduced.

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PVA polymer modified glass fiber reinforced cementitious composites

Li, Z. / Liu, A.C.P. / Leung, C.K.Y.

This report presents an experimental investigation an the effect of polyvinyl alcohol (PVA) polymer modified alkali resistance (AR)-glass fiber reinforced cementitious composites (GFRC). The performance of the alkali resistance glass fibres in blended cementitious matrix was evaluated by a series of tensile and flexural tests. Specimens with different amounts of PVA polymer were tested. Specimens under dry air and moist curing environment were compared. The results indicate that the addition of 2% (weight) PVA polymer Shows improvement in strength, toughness, ductility, and deflection. SEM studies indicated that PVA forms a thin film covering an the glass fibre surface, which inhibits the nucleation of calcium hydroxide crystals an the glass fibres surface and to enhance the formation of C-S-H during the hydration. The presence of PVA Shows the ability to reduce the embrittlement of the GFRC and changes the failure mode from brittle to ductile. EDAX results shows that the Ca/Si ratio in the fiber interface of the PVA modified specimens is greatly reduced.

PVA polymer modified glass fiber reinforced cementitious composites

Li, Z. / Liu, A.C.P. / Leung, C.K.Y.

This report presents an experimental investigation an the effect of polyvinyl alcohol (PVA) polymer modified alkali resistance (AR)-glass fiber reinforced cementitious composites (GFRC). The performance of the alkali resistance glass fibres in blended cementitious matrix was evaluated by a series of tensile and flexural tests. Specimens with different amounts of PVA polymer were tested. Specimens under dry air and moist curing environment were compared. The results indicate that the addition of 2% (weight) PVA polymer Shows improvement in strength, toughness, ductility, and deflection. SEM studies indicated that PVA forms a thin film covering an the glass fibre surface, which inhibits the nucleation of calcium hydroxide crystals an the glass fibres surface and to enhance the formation of C-S-H during the hydration. The presence of PVA Shows the ability to reduce the embrittlement of the GFRC and changes the failure mode from brittle to ductile. EDAX results shows that the Ca/Si ratio in the fiber interface of the PVA modified specimens is greatly reduced.

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Title:

PVA polymer modified glass fiber reinforced cementitious composites

Contributors:

Li, Z. (author) / Liu, A.C.P. (author) / Leung, C.K.Y. (author)

Published in:

a Tribute to Surendra P. Shah, Symposium, Concrete: Material Science to Application, 2002 ; 401-410

SP ACI special publications series / ACI, American Concrete Institute, ACI International SP ; 206

Publication date:

2002

Size:

10 Seiten, 6 Bilder, 2 Tabellen, 9 Quellen

ISBN:

Type of media:

Conference paper

Type of material:

Print

Language:

English

Keywords:

glasfaserarmierter Zement , Polyvinylalkohol , Alkaliangriff , modifizierte Faser , Zugprüfung , Biegefestigkeit , Festigkeitserhöhung , Zähigkeit (Werkstoff) , Duktilität , CSH (Calciumsilicathydrat) , Wasserabbinden von Zement , Versprödung , Versagensart

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