TY  - JOUR
TI  - Self-healing performance of biogranule containing microbial self-healing concrete under intermittent wet/dry cycles
AB  - Development of self-sensing and self-healing concrete is essential to minimize the labour-intensive monitoring and repair activitiesconducted for the maintenance of concrete structures. A type of self-healing concrete can be achieved by using microbial agentsthat induce calcium carbonate precipitation inside a concrete crack. Recently, biogranules consist of nitrate reducingmicroorganisms were presented as a new generation microbial healing agent and biogranule containing specimens revealed decenthealing performance under completely submerged conditions. However, their performance under intermittent wetting conditions,a common case for various concrete structures, remains unknown. This study presents the self-healing performance of biogranulecontaining biomortar specimens under intermittent wet/dry conditions. In-house produced biogranules were incorporated intomortar specimens at a dose of 1.45% w/w cement (1.00% of bacteria w/w cement) and self-healing performance of crackedspecimens were investigated under alternating wet/dry conditions for a crack width range of 50 to 600 µm. Upon alternating wet/drytreatment for 4 weeks, cracks up to a 400 µm crack width were effectively healed in biomortar specimens. Their water tightnessregain was 44% better than control specimens due to their enhanced healing performance. Overall, non-axenic biogranules appearto be useful in development of self-healing bioconcrete for applications under spraying or intermittent wetting conditions.
AU  - Erşan, Yusuf Çağatay
DO  - 10.2339/politeknik.742210
PY  - 2021
JO  - Politeknik Dergisi
VL  - 24
IS  - 1
SN  - 1302-0900
SP  - 323
EP  - 332
DB  - TRDizin
UR  - http://search/yayin/detay/419237
ER  -