Abstract
This paper deals with an improvement and an assessment of a polymeric macro-fibers adhesion to the cement matrix. For this purpose, two approaches were employed – (i) roughening of fibers using a plasma treatment and (ii) an addition of finely ground recycled concrete (amount 30 wt. %) to the matrix ensuring the roughness of interfacial zones. Polyethylene terephthalate (PET) and polypropylene (PP) fibers, both ca. 0.3mm in a diameter, were used. These were surface roughened using a cold oxygen plasma treatment and then observed by means of the scanning electron microscopy. Consequently, pull-out tests of an individual fiber embedded 25mm in the matrix were performed, while the force needed for fiber pullout was recorded. Results have shown that plasma treated fibers reached on a better adhesion with the matrix by up to ca. 5% (PET) and 20% (PP), if compared to reference fibers. When recycled concrete was used, the adhesion increased further by about 5–10% for both fiber types.
Highlights
It is widely known that waste production shows an unsustainable trend in global scale
This study researched the adhesion between polymeric macro fibers, having ca. 0.3 mm in the diameter, and two types of cement matrices
The reference matrix was composed of cement (CEM I 42.5 R, w/c 0.4), while in the second case, 30 wt. % of cement was replaced with recycled concrete at the form of finely ground powder
Summary
It is widely known that waste production shows an unsustainable trend in global scale. This hold true for the construction industry. It is reported that global production of construction demolition waste ranges from 3 to 10 billion tonnes per year of which 3.5 million tonnes in the Czech Republic. These basic data provide the sufficient proof of why it is necessary to deal with the reduction of waste and its re-use. It is necessary to find new efficient solutions for the reprocessing of construction waste including concrete from demolished buildings [2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
