Microstructure of interfacial transition zone between PET fibres and cement paste

Title:

Microstructure of interfacial transition zone between PET fibres and cement paste

Creator:

Machovič, Vladimír, Lapčák, Ladislav, Borecká, Lenka, Miloslav Lhotka, Andertová, Jana, Kopecký, Lubomír, and Mišková, Linda

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:ce2414e5-11aa-40b1-9292-e921716bd644
uuid:ce2414e5-11aa-40b1-9292-e921716bd644
doi:10.13168/AGG.2013.0012
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, spektroskopie, spectroscopy, fibre reinforced concrete, Raman mapping microspectroscopy, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

Considerable amount of waste in the form of polyethylene terephthalate (PET) bottles could be utilized in the form of dispersed microreinforcement in concrete. PET fibres, however, have poor wettability and adhesion to cement paste, 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 μm 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 distance 0 - 50 μm from an unmodified PET fibre. Besides the elevated concentration of these minerals, abundant pores occur in this region. In the case of alkaline modified PET fibres the ITZ zone was not found., Vladimír Machovič, Ladislav Lapčák, Lenka Borecká, Miloslav Lhotka, Jana Andertová, Lubomír Kopecký and Linda Mišková., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2013 Volume:10 | Number:1 (169)

Harvested from:

CDK

Metadata only:

false