Pemanfaatan Limbah Beton Sebagai Pengganti Agregat Kasar Dengan Penambahan Adittive Beton Mix Terhadap Nilai Kuat Tekan Beton

Utilization of concrete waste as an additional material for making
concrete. And this research also adds chemical additives to the
concrete mix using recycled coarse aggregate which is expected to
increase the strength of the concrete. This research aims to
determine the effect of adding concrete waste on the compressive
strength of concrete due to variations in adding additives (Concrete
Mix). and Knowing the comparison results of each substitute mixture
of pure coarse aggregate with recycled coarse aggregate added with
additives (Concrete Mix). This research method uses an
experimental research method by comparing 4 (four) variations of
the mixture to determine the compressive strength of concrete with
a design compressive strength of 25 MPa. The results of the research
show that each variation with a cylindrical specimen of 300mm x
150mm with a soaking age of 28 days, variations normal concrete
with an average compressive strength of 25.38 MPa, a variation of
25% waste concrete with an average compressive strength of 21.89
MPa, a variation of waste concrete + 400ml mixed concrete with an
average compressive strength of 25.48 MPa and a variation of waste
concrete + mixed concrete 600ml with an average compressive
strength of 28.31 MPa. So it can be concluded that the use of 25%
concrete waste does not meet the planned compressive strength
and cannot be used in construction, whereas by adding 400ml and
600ml mixed concrete additives, the maximum compressive strength
is obtained and is suitable for use in construction.