MICROSTRUCTURE OF INTERFACIAL TRANSITION ZONE BETWEEN PET FIBRES AND CEMENT PASTE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F14%3A00224670" target="_blank" >RIV/68407700:21110/14:00224670 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

MICROSTRUCTURE OF INTERFACIAL TRANSITION ZONE BETWEEN PET FIBRES AND CEMENT PASTE

Popis výsledku v původním jazyce

Considerable amount of waste in the form of polyethylene terephthalate (PET) bottles could be utilized in the form of dispersed microreinforcement in concrete (fibre reinforced concrete). PET fibres, however, have poor wettability and adhesion to cementpaste, which can be modified by alkaline hydrolysis with sodium hydroxide at elevated temperature. The alkaline treatment was used to increase fibre surface, which was followed by changes in the structure of the interfacial transition zone (ITZ) and interfacial bond between fibre and cementitious matrix. Raman microspectroscopy mapping was employed to study microstructural changes of ITZ within the distance 0 ? 250 ?m from a PET fibre. The band at 357 cm-1 corresponding to the Ca?O bond vibration in portlandite was used to determine its distribution. For determination of the relative abundance of ettringite, the SO42- stretching vibration at 987 cm-1 was used. The most intensive bands of portlandite and ettringite were found within the

Název v anglickém jazyce

MICROSTRUCTURE OF INTERFACIAL TRANSITION ZONE BETWEEN PET FIBRES AND CEMENT PASTE

Popis výsledku anglicky

Considerable amount of waste in the form of polyethylene terephthalate (PET) bottles could be utilized in the form of dispersed microreinforcement in concrete (fibre reinforced concrete). PET fibres, however, have poor wettability and adhesion to cementpaste, which can be modified by alkaline hydrolysis with sodium hydroxide at elevated temperature. The alkaline treatment was used to increase fibre surface, which was followed by changes in the structure of the interfacial transition zone (ITZ) and interfacial bond between fibre and cementitious matrix. Raman microspectroscopy mapping was employed to study microstructural changes of ITZ within the distance 0 ? 250 ?m from a PET fibre. The band at 357 cm-1 corresponding to the Ca?O bond vibration in portlandite was used to determine its distribution. For determination of the relative abundance of ettringite, the SO42- stretching vibration at 987 cm-1 was used. The most intensive bands of portlandite and ettringite were found within the

Druh

O - Ostatní výsledky

CEP obor

JI - Kompositní materiály

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů