Akademik Veri Yönetim Sistemi
2nd World Congress and Expo on Recycling, Berlin, Almanya, 25 - 27 Temmuz 2016
This research analyses recycle of polypropylene
fiber admixed concretes. Study aims to research reuse of fiber admixed recycled
aggregates in concrete. In this research
eight types of polypropylene fiber are used.
Polypropylene fibers added to the mixture in three different ratios. The
quantity of cement in the mixture is 300 kg/m3. Water-cement ratio is
0,52. For experiments, cylinder concrete molds with 150 mm diameter and 300 mm
height were used. Samples were broken by jawbreaker at the end of 120 days. As
a result of the break, recycled fiber aggregates were obtained with 0-4 mm,
7-15 mm and 16-22.4 mm sizes. Recycled aggregates’ specific weight and unit
weight were calculated. Values of specific weight and unit weight were
decreased. By using fiber-reinforced recycled aggregates a new concrete mixture
was made. To the new mixture, recycled aggregates with sizes of 7-15 mm and
16-22.4 mm were added. As fine
aggregate, 0-4 mm natural sand is used. Ratio of cement in the new mixture is
350 kg/m3 Ratio of water-cement is 0,56. Compression strength of the
obtained concrete is analyzed for 28 days.
Compression strengths of fiber admixture concrete and fiber admixture
recycled aggregated concrete are compared. Compression strength is decreased by
22.59 % in some mixtures and increased by 11,14 % in some others. It is
concluded that by changing water-cement ratio and quantity of chemical
admixture, it is possible increase the compression strength. Therefore it is possible to use polypropylene
fiber concretes in recycling.