USE OF SLAG WELDING SAW SUBSTITUTION AS COARSE AGGREGATE IN CONCRETE

Abstract

This research, steel welding waste called slag welding
SAW was used as a substitute for coarse aggregate in
concrete with a content of 50%. This study aims to
determine the utilization of SAW welding slag waste
as a substitute for coarse aggregate concrete by
testing the compressive strength, tensile strength, and
flexural strength. The concrete mix design plan uses
quality of 25 MPa, using SNI 2834-2000. The
specimens for testing the compressive strength of
normal concrete and concrete slag welding SAW at
the age of 14, 21, and 28 days totaling 18 cubes with
a size of 15 x 15 x 15 cm, testing the tensile strength
of concrete slag welding SAW at the age of 28 days
totaling 2 shapes cylinder with a size of 30 x 15 cm,
as well as testing the flexural strength of concrete
slag welding SAW at the age of 28 days totaling 2
blocks with a size of 50 x 10 x 10 cm. Slump test of
fresh concrete design (60-180) mm. The average
compressive strength test results for normal concrete
at 28 days were 16,465 MPa. The results of the
average compressive strength test of concrete slag
welding SAW at 28 days were 15,518 MPa. The
average tensile strength test results of slag welding
SAW concrete at 28 days were 1.36 MPa. The
average flexural strength test results of slag welding
SAW concrete at 28 days were 1.17 MPa.