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Abstrak. Makalah ini adalah hasil studi eksperimental mengenai  penggunaan limbah nikel di dalam meminimalkan dampak intrusi  mikroorganisme terhadap perilaku fisik pada material beton. Mikroorganisme yang diintrusikan ke dalam pori-pori beton adalah golongan jamur (Aspergillus niger) dan ragi (Sacchromycodes ludwigi). Kedua golongan mikroorganisme ini memproduksi zat organik yaitu asam asetat (CH3COOH) yang dapat bereaksi dengan senyawa kimia di dalam material beton, terutama senyawa kalsium hidroksida dan kalsium silikat hidrat. Reaksi tersebut berdampak pada meningkatnya porositas, koefisien permeabilitas, dan hilangnya sebagian massa beton. Dampak intrusi mikroorganisme tersebut dapat diminimalkan dengan menggunakan 16% bubuk slag nikel. Untuk beton tanpa bubuk slag nikel, perilaku fisiknya cenderung mengikuti persamaan fungsi geometri, sedangkan pada beton 16% bubuk slag nikel cenderung mengikuti persamaan fungsi laju pertumbuhan jenuh. Abstract . This paper is presents the experimental study on use of nickel slag powder in the minimization intrusion impact of microorganism to physical properties of concrete materials. The intrusion of microorganism into concrete pores is fungus (Aspegillus Niger) and yeast (Sacchromycodes ludwigi) groups. Both types of this microorganism produce organic matter is acetate acid (CH3COOH) able to react with chemical compound in concrete materials, especially calcium hydroxide and calcium silicate hydrate compound. The reaction affect on the increasing of porosity, permeability coefficient, and loss masses of concrete. The effect of intrusion of microorganism can be minimized by use 16% nickel slag powder. For concrete without nickel slag powder, physical properties tend to follow equation of geometry function (power equation equation), while the concrete of 16% nickel slag powder as indicated by equation of saturated growth rate function.

Kontribusi Bubuk Slag Nikel di dalam Meminimalkan Dampak Intrusi Mikroorganisme terhadap Perilaku Fisik Material Beton