Investigation of bond behavior between lightweight aggregate concrete and steel rebar using bending test


Arslan M. E. , Durmus A.

COMPUTERS AND CONCRETE, cilt.8, ss.465-472, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 8 Konu: 4
  • Basım Tarihi: 2011
  • Doi Numarası: 10.12989/cac.2011.8.4.465
  • Dergi Adı: COMPUTERS AND CONCRETE
  • Sayfa Sayıları: ss.465-472

Özet

This paper investigates bond behavior of structural lightweight concrete (SLWC) and ordinary concrete (OC) comparatively using bending test called Standard Belgium Hinged Beam Test (SBHBT). For this purpose the experiments were carried out as three series on 36 beam specimens (12 specimens of SLWC and OC with 20 phi development length, 12 specimens of SLWC with 25 phi development length). For each series bond behavior of steel rebars with 8, 10, 12, 14 mm diameters were tested. The results indicate that bond strength of SLWC is considerable lower than OC and 20 phi development length is insufficient for steel rebars with 12 mm and 14 mm diameters. Therefore development length of SLWC was extended to 25 phi, even if 8 and 10 mm steel rebars provided acceptable bond strength. In this way, bond strength between SLWC and 8 and 10 mm steel rebars was developed. In addition, adequate bond behavior was achieved for 12 mm rebar but the beam in which 14 mm rebar used exceeded their bearing capacity by shear forces before yield stress. This result shows that SBHBT is more convenient for small sized steel rebars.