UJI EKSPERIMENTAL KUAT LENTUR BALOK DAN PELAT BETON BERTULANG DENGAN AGREGAT KASAR DAN HALUS BETON DAUR ULANG
ABSTRACT: In this experimental
study, recycled concrete was used on cylinder specimens, the reinforced concrete
beams, and the reinforced concrete slabs. Recycled concrete made of waste
material from laboratory experiment is used for fine and coarse aggregates in
this experiment. Cylinder specimens, beams, and slabs were used to determine
the mechanical properties such as compressive strength, shear strength, split
tensile strength, and flexural strength. Two mix designs with fc’ = 25 MPa and Fc’
= 20 MPa were used in this study. Three different persentage variations of
recycled concrete aggregates were used in mix design with ' c f = 20 MPa.
Firstly, it consists of 100% recycled coarse aggregates (RCA) and 0% recycle
fine aggregates (RFA). Secondly, it consists of 80% RCA and 20% RFA, and
thirdly, it consists of 60% RCA and 40% RFA. Nine reinforced concrete slabs
with three variations of mix design were tested. The test results showed that
the mechanical properties such as compressive strength, split tensile strength,
shear strength, and flexural strength decreased when using more RFA. The
flexural strength of reinforced concrete slab showed that the yield and
ultimate moment are close to each other, but ductility decreased when the RFA
increased. Three different persentage variations of coarse recycled concrete
aggregates (RCA) were used in mix design with ' c f = 25 MPa, which are 0%,
50%, and 100% of RCA. The test results showed the characteristics of
compressive strength values are: fc’=28.7 MPa and fc’=28.4 MPa for each of the
mixtures of 50% and 100% RCA. The split tensile strength values are: fct= 2.38
MPa, fct= 2.78 MPa, and fct= 2.81 MPa for 0%, 50% and 100% RCA. While the shear
strength are: Fv= 5,55 MPa, fv= 4,28 MPa, and fv= 3.86 MPa for 0%, 50%, and
100% RCA.
Keywords: recycled coarse
aggregates, recycled fine aggregates, compressive strength, split tensile strength,
shear strength, flexural strength, ductility
Penulis: Buen Sian, Adhijoso
Tjondro, Riani Sidauruk, Sisi Nova Rizkiani
Kode Jurnal: jptindustridd130172
