Determination of the Strength Characteristics of Sporosarcinal - Pasteurii Concrete

Abstract

The strength characteristics of Sporosarcinal Pasteurii concrete (S. Pasteurii concrete) was investigated. To achieve this aim, the suitability of the materials used for concrete specimens were tested before the compressive, tensile and flexural strength of the S. Pasteurii concrete was investigated. Bacteria concentration of 0, 0.5, 2, 4 and 6OD was mix with the concrete. The water cement ratio adapted was 0.5. For the compressive strength, three cubes of size 150 x 150 x150mm was crushed for each curing day of 1, 3, 7,14, 28 and 56 days. The average compressive strength was obtained as the compressive strength of the concrete at each curing age. For the split tensile strength, three cylindrical specimen of size 100mm x 200mm was used at each day to obtain the strength at 7, 14, 21 and 28 days. The average tensile strength was obtained and for the flexural strength, three beam samples of 100 x 100 x 450mm was used at each curing day of 7, 14, 21 and 28days to obtain the average flexural strength. All the properties of the materials used for the concrete production met the standard requirement of the relevant code of practice. The compressive, tensile and flexural strength of S. Pasteurii concrete was improved in comparison with the control concrete. The percentage increase of the compressive strength at 28days are 17.76%, 19.72%, 25% and 4.04% for 0.5OD, 2OD, 4OD and 6OD respectively. The highest tensile strength was increased by 16.24% and obtained when 0.5OD bacteria concentration was used and cured for 14days. The flexural strength of S. Pasteurii concrete was improved by 44.44%, 8.89%,47.40% and 8.52% for 0.5OD, 2OD,4OD and 6OD respectively at 28 day of curing.