STUDI EKSPERIMENTAL PENGARUH PERSENTASE CAMPURAN BAKTERI BACILLUS CEREUS TERHADAP KUAT TEKAN BETON PADA SELF HEALING CONCRETE (SHC)
Daftar Isi:
- Infrastructure development is inseparable from the concrete construction, concrete material generally consists of a mixture of coarse aggregate, fine aggregate, cement and water. In the manufacture of concrete often contained cavities in the concrete and often cracks in the concrete caused by the heat of hydration, weather extremes and others. This resulted in the concrete can decrease the compressive strength of concrete plans, therefore this study uses additional materials such as bacteria bacilllus cereus because in previous studies of bacterial spores Bacillus cereus can withstand temperatures up to 100o C, which is added to the concrete with mixture percentage of bacteria to the water as much as 4%, 5% and 6%. With a population of 106 bacterial cells / ml. In this study, self-healing concrete is reviewed in three stages of the experiment, ie at the age of 7, 14 and 28 days, the results of compressive strength of concrete SHC highest in the percentage of 5% of the bacteria Bacillus cereus which is 30,16 MPa higher than the compressive strength of normal concrete with a mixture of planning and the same with the average maximum compressive strength of 22,55 MPa. SHC so that concrete can increase the maximum compressive strength at the age of up to 33,75 %. in the development of bacteria seen from SEM analysis by comparing normal concrete with an average of 6,64 μ cavity with concrete that has the content of the bacteria, the bacteria can grow and expand by 16,49 π. so that concrete SHC which contains bacillus cereus bacteria by 5% both are used in all types of buildings that have a concrete structure Key Words: Self-healing concrete, bacillus cereus bacteria, compressive strength, concrete