Author/Authors :
Rezaei Alireza نويسنده , Akhavan Kazemi Kani نويسنده MSc degree in Civil Engineering from Eastern Mediterranean University , Eren Ozgur نويسنده PhD degree from Eastern Mediterranean University.
Abstract :
This paper describes an experimental study conducted to investigate the
properties of concretes produced with recycled aggregates and normal aggregates for two
di erent concrete classes (C20/25, C30/37). Tests of compressive strength, splitting
tensile strength, ultrasonic pulse velocity, rebound hammer, wet and dry density, and
freeze-thaw resistance were conducted on specimens of the concretes. Moreover, slump
test was conducted on fresh concrete. The results showed that the slump of Recycled
Aggregate Concrete (RAC) was less than that of Normal Aggregate Concrete (NAC).
For class C20/25, the average compressive strength, rebound hammer, and density of
the RAC were 26%, 17%, and 16.6% less, respectively, than those of NAC. The splitting
tensile strength of RAC was 3.5% greater than that of NAC. Moreover, for C30/37 the
average compressive strength, splitting tensile strength, rebound hammer, and density
of the RAC were 32.5%, 12%, 21% and 30% less, respectively, than those of NAC. For
classes C20/25 and C30/37, the ultrasonic pulse velocities of RAC were 17% and 18%,
respectively, smaller than those of NAC, RAC for C20/25 lost 2.5% more weight than NAC
in freeze-thaw resistance tests and RAC for C30/37 lost 29% more weight than NAC in
this test.
