Biološki procesi samopopravljivosti betona

diplomsko delo

Mojca Legan (Author), Andreja Žgajnar Gotvajn (Mentor)

Abstract

V biološkem procesu samopopravljivosti betona, bakterije proizvajajo kristale kalcijevega karbonata in z njimi napolnijo razpoke, ki se pojavljajo na površini betona. Po navadi se te bakterije hranijo s kalcijevim laktatom in med presnovo proizvajajo kalcijev karbonat, ki tesni razpoke. Neaktivne bakterije se aktivirajo, ko pridejo v stik z vodo in kisikom. Poraba kisika med delovanjem bakterij pa ne pomaga le pri bakterijski pretvorbi kalcijevega laktata v kalcijev karbonat, temveč se tako tudi zmanjša količina kisika v betonu, saj ta ustvarja pogoje za korozijo. Zaradi bakterijske pretvorbe se kisik porabi in s tem podaljša obstojnost betonske infrastrukture. Namen diplomskega dela je bil pregled dostopne literature s področja bioloških procesov samopopravljivosti betona in primerjava teh procesov z naravnimi procesi samopopravljivosti betona. Ugotovitve avtorjev, ki opisujejo procese samopopravljivosti betona, se v mnogih pogledih še vedno razlikujejo. Največ razlik pri avtorjih opazimo predvsem v smislu kako izbrati najbolj učinkovito vrsto bakterije ter organskega hranila oziroma nutrienta za te bakterije, ter na kakšen način vnesti te bakterije v sam beton.

Keywords

beton;samopopravljivost betona;biološki procesi;bakterije;kalcijev karbonat;biološko obarjanje;diplomska dela;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[M. Legan]
UDC:	666.97.098(043.2)
COBISS:	1538305219
Views:	788
Downloads:	188
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary abstract:	In the biological process of self-healing concrete bacteria produce crystals of calcium carbonate, which fills the cracks on the surface of the concrete. Usually this type of bacteria feed theirselves with calcium lactate and during metabolism process calcium carbonate is formed, which ends in the cracks. Inactive bacteria become active when they get in contact with water and oxygen. During metabolism bacteria consume oxygen, and as a result that contributes to a lower amount of oxygen in the concrete and better corrosion resistance of reinforced concrete. Because of this kind of biological conversion of chemical substances and consequently lack of oxygen in the concrete, durability and resistance of concrete structures is improved. The purpose of graduation thesis was examination of accessible literature from the field of biological processes of self-healing concretes and comparison of those with natural processes of self-healing concretes. Knowledge and research conclusions of different authors, which describes processes and effects of self-healing concrete, are still different from many aspects. Authors still aren't unified, which type of bacteria is the most appropriate for usage in self-healing concrete, which organic nourishment or nutrient is most effective and what technology of making self-healing concrete is most adequate from different perspectives in civil engineering.
Secondary keywords:	bacteria;concrete;biological processes;calcium carbonate;self-healing;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000372
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo
Pages:	28 str.
ID:	11214225