A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of self-healing on strength and durability of zeolite-immobilized bacterial cementitious mortar composites
AbstractThere is a compelling economic incentive to develop concrete materials that can repair its own damage, increase durability and prevent structural failure. This research investigated the potential of adding two different mineral producing bacteria into two types of cementitious mortar matrix to enhance self-healing ability for autonomous crack repair. In this study, zeolite was used as a carrier material to protect bacteria in high pH environment normally exists in concrete. The spore forming ability and ureolytic activity of zeolite-immobilized bacteria were investigated in order to examine potential for producing healing compounds. The self-healing ability of bacteria incorporated normal and fiber reinforced mortars was judged based on the development of compressive strength and permeation properties of cracked specimens with age as well as micro-structural characterization of crack healing compounds using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction.
HighlightsStudied self-healing characteristics of bacteria incorporated mortar composites.Used zeolite as a bacterial carrier and studied influence of bacteria on strength and permeation properties.SEM, EDS and XRD studies were conducted to confirm the presence of calcite precipitation at cracks.All bacteria incorporated mortar composites exhibited excellent self-healing characteristics.
Effect of self-healing on strength and durability of zeolite-immobilized bacterial cementitious mortar composites
AbstractThere is a compelling economic incentive to develop concrete materials that can repair its own damage, increase durability and prevent structural failure. This research investigated the potential of adding two different mineral producing bacteria into two types of cementitious mortar matrix to enhance self-healing ability for autonomous crack repair. In this study, zeolite was used as a carrier material to protect bacteria in high pH environment normally exists in concrete. The spore forming ability and ureolytic activity of zeolite-immobilized bacteria were investigated in order to examine potential for producing healing compounds. The self-healing ability of bacteria incorporated normal and fiber reinforced mortars was judged based on the development of compressive strength and permeation properties of cracked specimens with age as well as micro-structural characterization of crack healing compounds using scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction.
HighlightsStudied self-healing characteristics of bacteria incorporated mortar composites.Used zeolite as a bacterial carrier and studied influence of bacteria on strength and permeation properties.SEM, EDS and XRD studies were conducted to confirm the presence of calcite precipitation at cracks.All bacteria incorporated mortar composites exhibited excellent self-healing characteristics.
Effect of self-healing on strength and durability of zeolite-immobilized bacterial cementitious mortar composites
Bhaskar, Sini (author) / Anwar Hossain, Khandaker M. (author) / Lachemi, Mohamed (author) / Wolfaardt, Gideon (author) / Otini Kroukamp, Marthinus (author)
Cement and Concrete Composites ; 82 ; 23-33
2017-05-23
11 pages
Article (Journal)
Electronic Resource
English
Self‐Healing Bacterial Cementitious Composites
| Wiley | 2021
DURABILITY OF CEMENTITIOUS COMPOSITES
| British Library Conference Proceedings | 2005