Penggunaan Limbah Nikel Sebagai Material Subtitusi Agregat Kasar Pada Beton K.250

The purpose of this study was to Analyze the characteristics of the
aggregates used in concrete mixtures and analyze how much
increase in compressive strength of concrete with a variation of
nickel slag substitution 0%, 5%, 15%, 25% compared with normal
concrete. The characteristics of the material examined are water
content, sludge content, specific gravity and absorption, volume
weight, abrasion with los angeles machines, and filter analysis.
While the large increase in compressive strength of concrete can be
tested at the age of 7 days, 14 days, 28 days and 35 days.

From the results of the analysis of the characteristics of nickel slag
waste in concrete mixes meet the test standards in concrete
mixtures, with a moisture content of 0.86%, sludge content of 0.44%,
specific gravity of 2.94 gr / cm3, volume weight of 1.76 gr / cm3,
abrasion 36.07%. And a large increase in compressive strength of
concrete with a variation of nickel slag substitution of 0%, 5%, 15%,
25% compared to normal concrete is increasing. The highest
percentage increase in concrete compressive strength is found in
concrete compressive strength between a variation of 15% with a
variation of 25% at 14 days concrete age, with a percentage increase
in value of 13.13%.