Akademik Veri Yönetim Sistemi
2nd World Congress and Expo on Recycling, Berlin, Almanya, 25 - 27 Temmuz 2016
In this study, re-use of
recycle aggregates obtained from polypropylene fiber-reinforced welded
concretes in concrete is researched. Eight kinds of polypropylene fibers were
used in the study. Polypropylene fibers were used within the admixture at three
different rates. The amount of cement in the admixture is 300 kg/m3. Water-cement rate is 0,52. Cylinder samples in
150 mm diameter and 300 mm height were used for the tests. Samples were crushed
in jaw crusher in the end of 120 days. Fibrous
recycle aggregates at the size of 0-4 mm, 7-15 mm and 16-22.4 mm were acquired
in the end of crushing. A new concrete admixture was acquired by using
fiber-reinforced recycle aggregates. Recycle aggregates at the sizes of 7-15 mm and 16-22.4 mm were added to new admixture. 0-4 mm natural sand
was used as fine aggregate. The fine aggregate obtained from recycle was not
used in the new admixture. It was observed in the pretests carried out that
recycle fine sand increase the amount of water and cement in the admixture. The
amount of cement in new admixture is 350 kg/m3. Water-cement rate is
0,56. Cubic samples were prepared from new
admixture at the size of 70x70x115 mm. upward wear and water absorption
tests were conducted on the samples in the end of 28 days. Welded concrete was
compared with abrasion and water absorption values. Abrasion and
water-absorption values have increased compared to welded concrete.