Title:
Bond Strength between High-Performance Concrete and 7 mm Non-Pretensioned Plain Steel Wire
Author(s):
Andrzej Seruga and Marcin Dyba
Publication:
Structural Journal
Volume:
122
Issue:
1
Appears on pages(s):
169-181
Keywords:
bond behavior; bond stress-slip relationship; high-performance concrete (HPC); plain steel wire; pullout test.
DOI:
10.14359/51742145
Date:
1/1/2025
Abstract:
This paper examines the bond behavior between non-pretensioned
plain steel wire and high-performance concrete (HPC). It investigates the effects of embedment length and concrete compressive strength on bond performance for the production of railway sleepers. To determine the performance, pullout concrete specimens reinforced with 7 mm diameter plain steel wire were cast
and tested under a uniaxial load. The main test parameters include
the embedment length: 40, 80, 120, 240, 330, and 460 mm; and
concrete compressive strength: 40, 60, 72, and 88 MPa. The modified pullout test method developed at Cracow University of Technology was used in the experimental investigation.
The study unequivocally demonstrates that the maximum bond
stress between HPC and a non-pretensioned plain steel wire with
a diameter of 7 mm decreases as the embedment length increases,
irrespective of the concrete’s compressive strength. Furthermore,
it was observed that the average bond stress increases with an
increase in the concrete’s compressive strength with time. After
conducting tests on HPC specimens with compressive strengths
ranging from 60 to 88 MPa and embedment lengths ranging from
40 to 120 mm, it was determined that the resulting maximum
adhesion bond stress was 2.22 MPa. This was 52% higher than
the bond stress found in test pieces made of concrete with fcm =
40 MPa. Additionally, the average residual bond stress was found
to be twice that of concrete with a compressive strength of 40 MPa.
These findings demonstrate a clear advantage of using HPC in
terms of bond stress.