CD Skripsi
Pengaruh Variasi Konsentrasi Bakteri Bacillus Subtilis Terhadap Sifat Mekanik Beton Di Lingkungan Sulfat
ABSTRACT
The use of concrete structures is the main choice for construction development,
especially in the riau province. Concrete has several advantages and
disadvantages. One of the shortcomings in concrete is cracks. The strength of
concrete will decrease if there are cracks. One of the innovations that can overcome
the problem is by utilizing bacteria as a concrete mixture material. Bacillus subtilis
bacteria is able to repair cracks in concrete. This study examined Bacillus subtilis
concrete bacteria with different concentration volume variations of 105 cells/20 ml,
105 cells/25 ml and 105 cells/30 ml soaked using sulfate solution. This study
examines the mechanical properties of concrete that is Compressive Strength and
Flexural Strength on concrete. Testing is carried out at the concrete age of 28 days
and 56 days after soaking the sulfate solution. Based on the results of the study
obtained that the volume of the best concentration of Bacillus subtilis bacteria on
concrete is 105 cells / 20 ml, with the highest Compressive Strength test results with
an increase of 28.16% and 22.94% against normal concrete at the time of testing
at the age of 28 and 56 days, the highest Flexural Strength test results with an
increase of 11.83% and 14.74% against normal concrete at the time of testing were
28 and 56 days old in the sulfate environment.
Keyword : Concrete, Cracks, Bacillus subtilis, sulfate, Mechanical Properties,
Compressive Strength, Flexural Strength
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