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MICROSCOPIC ANALYSIS OF CEMENT BEAMS AFTER ACCELERATED DEGRADATION TESTS

Kostelecka, M.; Pernicova, R.
Abstract:
The article deals with the degradation of cement beams containing polypropylene and polyvinyl alcohol fibres. Nowadays it is developed high-quality concrete that contains a minimum of reinforcement or all it is replace by micro fibres. Microscopic examination of fiber breakage and changes at fiber-matrix interface was investigated in this paper. The cement beams were stored in an aggressive environment of 3% NaCl, 5% NaOH and 5% H2SO4 for 28 days (CSN P CEN / TS 12390-11). Mechanical parameters and changes of fibres structure was monitored after 7 and 28 days. The confocal laser scanning microscope Lext OLS 3000 with 3D display capability was used to monitor degradation changes. Aggressive environment represent by chloride solution (NaCl) and sulphate solution (H2SO4) was simulated within the resistance test. On the basis of the measured experiments, it can be concluded that, aggressive environment had just negligible influence on the mechanical parameters and the degradation of the individual fibres did not show at all.
SGEM Research areas:
Year:
2018
Type of Publication:
In Proceedings
Keywords:
degradation; PVA; PP; microscopy; cement beams
Volume:
18
SGEM Book title:
18th International Multidisciplinary Scientific GeoConference SGEM 2018
Book number:
6.3
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
635-640
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
02-08 July, 2018
ISBN:
978-619-7408-52-2
ISSN:
1314-2704
Conference:
18th International Multidisciplinary Scientific GeoConference SGEM 2018, 02-08 July, 2018
DOI:
10.5593/sgem2018/6.3/S27.082
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