DBPapers

MICROSCOPIC ANALYSIS OF CEMENT BEAMS AFTER ACCELERATED DEGRADATION TESTS

M. Kostelecka, R. Pernicova
Thursday 11 October 2018 by Libadmin2018

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.

Keywords: degradation, PVA, PP, microscopy, cement beams


Home | Contact | Site Map | Site statistics | Visitors : 0 / 353063

Follow site activity en  Follow site activity GREEN DESIGN AND SUSTAINABLE ARCHITECTURE  Follow site activity Papers SGEM2018   ?

CrossRef Member    Indexed in ISI Web Of Knowledge   Indexed in ISI Web Of Knowledge
   

© Copyright 2001 International Multidisciplinary Scientific GeoConference & EXPO SGEM. All Rights Reserved.

Creative Commons License