Degradasi Kekuatan Beton Akibat Intrusi Mikroorganisme
Abstrak
This paper presents the experimental study on concrete strength degradation under intrusive of microorganism.
The intrusion media of coconut water with natural fermentation process produces microorganism with dominant
elements are aspergillus niger and sacchromycode ludwigi. The microorganism may be well spread in concrete
due to nutrition such as free lime from reaction process. The microorganism in its present in concrete produces
sulfuric acid (H2SO4) and its reaction with calsium hydroxide (CaOH) causes strength reduction in concrete.
Experimental result shows that for concrete of minimum strength, its strength degradation is more sensitive due
to intrusion microorganism. The degradation in strength concrete may be of range 60% for concrete strength fc’
= 25 MPa, 50% for fc’ = 40 MPa, and 33% for fc’ = 60 MPa.
The intrusion media of coconut water with natural fermentation process produces microorganism with dominant
elements are aspergillus niger and sacchromycode ludwigi. The microorganism may be well spread in concrete
due to nutrition such as free lime from reaction process. The microorganism in its present in concrete produces
sulfuric acid (H2SO4) and its reaction with calsium hydroxide (CaOH) causes strength reduction in concrete.
Experimental result shows that for concrete of minimum strength, its strength degradation is more sensitive due
to intrusion microorganism. The degradation in strength concrete may be of range 60% for concrete strength fc’
= 25 MPa, 50% for fc’ = 40 MPa, and 33% for fc’ = 60 MPa.