| dc.description.abstract | The high demand for concrete in infrastructure development
motivates research to improve the strength of concrete, including the
exploration of substitutes or additives to concrete mixes from local
waste. One of the materials considered is blood clam shell waste.
This study aims to identify the effect of variations in adding Sikament
LN superplasticizer to concrete with 10% blood clam shell powder
as a partial substitution of sand on concrete's compressive strength
and tensile strength and determine the maximum strength value. The
Sikament LN variations used were 0%, 1%, 1.25%, and 1.5% by
weight of cement. This research was conducted using an
experimental test, including aggregate testing, mix planning, making
test specimens, and testing compressive and tensile strength after 28
days. Mix planning calculations were carried out based on SNI 03-
2834-2000. The results showed that the addition of Sikament LN and
the substitution of blood clam shell powder significantly improved
the strength of concrete. The compressive strength of concrete
increased between 5.402% to 29.574%, while the split tensile
strength increased between 11.779% to 27.793%. The highest
strength values were achieved in concrete with 1.5% Sikament LN
and 10% blood clam shell powder, with a compressive strength of
27.361 MPa and split tensile strength of 2.757 MPa, compared to
regular concrete with a compressive strength of 21.116 MPa and
tensile strength of 2.157 MPa. These results demonstrate the
potential of using blood clam shell waste and Sikament LN
superplasticizer as effective additives in improving concrete
performance. | en_US |
