This biochemically mediated process resulted in efficient sealing of sub-millimeter sized (0.15 mm width) cracks. The mechanism of crack healing in bacterial concrete presumably occurs through metabolic conversion of calcium lactate to calcium carbonate what results in crack-sealing. Microscopic techniques in combination with permeability tests revealed that complete healing of cracks occurred in bacterial concrete and only partly in control concrete. In the present study the crack healing capacity of a specific bio-chemical additive, consisting of a mixture of viable but dormant bacteria and organic compounds packed in porous expanded clay particles, was investigated. Therefore, within the Delft Centre for Materials at the Delft University of Technology, the functionality of various self-healing additives is investigated in order to develop a new generation of self-healing concretes. #Sandkorn am auge manualĪs regular manual maintenance and repair of concrete constructions is costly and in some cases not at all possible, inclusion of an autonomous self-healing repair mechanism would be highly beneficial as it could both reduce maintenance and increase material durability. Ingress water and chemicals can cause premature matrix degradation and corrosion of embedded steel reinforcement. While larger cracks hamper structural integrity, also smaller sub-millimeter sized cracks may result in durability problems as particularly connected cracks increase matrix permeability. The results showed a variety of variations, but the majority of the composition of 10⁵ Cells/ml of water was the most effective composition improved, the crack improvement reached 93.33% on crack with dimension of 0.5 mm width and 3 cm depth at 60-day mortar age.Ī typical durability-related phenomenon in many concrete constructions is crack formation. The bacterial composition used was 10⁴ Cells/mL of water, 10⁵ Cells/ml of water and 10⁶ Cells/ml of water, with the addition of medium peptone, NaCl and yeast extract mixed on the mortar test sample. The purpose of this study is to find out how much influence in the addition of bacteria in a particular composition to a rigid pavement to repair cracks and analyze the most effective methods used to accelerate the process of repair cracks in a rigid pavement. Bacillus Subtillis is a bacteria that lives on the ground that has been separated in the laboratory. Method of repair cracks in the rigid pavement can be done in various ways, one is with the addition of Bacillus Subtillis Bacteria. Cracks in a rigid pavement are the main cause of water entry into the structure.Wiley is a global provider of content and content-enabled workflow solutions in areas of scientific, technical, medical, and scholarly research professional development and education. Our core businesses produce scientific, technical, medical, and scholarly journals, reference works, books, database services, and advertising professional books, subscription products, certification and training services and online applications and education content and services including integrated online teaching and learning resources for undergraduate and graduate students and lifelong learners. has been a valued source of information and understanding for more than 200 years, helping people around the world meet their needs and fulfill their aspirations. Wiley has published the works of more than 450 Nobel laureates in all categories: Literature, Economics, Physiology or Medicine, Physics, Chemistry, and Peace.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |