Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars

Simple item page
dc.contributor.authorMunyao, Onesmus Mulwa
dc.contributor.authorThiong’o, Joseph Karanja
dc.contributor.authorWachira, Jackson Muthengia
dc.contributor.authorMutitu, Daniel Karanja
dc.contributor.authorMwirichia, Romano
dc.date.accessioned2020-08-31T12:27:36Z
dc.date.available2020-08-31T12:27:36Z
dc.date.issued2020
dc.descriptionA research article published in Journal of Chemistryen_US
dc.description.abstractCement-based materials are subject to degradation during their service life. Most of the structural failures have been associated with corrosion of the rebar due to chloride ingress, alkali aggregate reaction, and/or sulfate attack. Microbial activities, especially in waste water collection points such as sewer lines, may compromise the integrity of concrete structures. (is study reports an experimental work carried out to determine the effect of Starkeya novella bacteria species on mechanical and microstructural properties of cement mortars. Mortar prisms were prepared from selected ordinary Portland cement (OPC) and Portland pozzolana cement (PPC) in Kenyan markets. Bacterial solution of 1.0 ×107 cell/mL concentration was used as either mix water, curing media, or both. Distilled water was used to prepare mortar prisms for control samples. Compressive strength was determined after the 7th, 28th, 56th, and 90th day of curing. Scanning electron microscopy (SEM) was tested on both bacterial and control mortar prisms after the 28th day of curing. Both PPC and OPC exhibited significant decrease in compressive strength for bacterial-prepared mortars as compared to controls. SEM analysis showed extreme erosion on the microstructure of the microbial mortars. (is was denoted by massive formation of ettringite and gypsum which are injurious to mortar/concrete.en_US
dc.identifier.citationMunyao, O. M., Thiong’o, J. K., Wachira, J. M., Mutitu, D. K., & Mwirichia, R. (2020). Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars. Journal of Chemistry, 2020.en_US
dc.identifier.issn2090-9071
dc.identifier.urihttp://downloads.hindawi.com/journals/jchem/2020/8212396.pdf
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/20290
dc.language.isoenen_US
dc.publisherHindawien_US
dc.subjectStarkeya novellaen_US
dc.subjectCement Mortarsen_US
dc.titleInfluence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortarsen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Influence of Starkeya novella on Mechanical and Microstructural.pdf
Size:
7.02 MB
Format:
Adobe Portable Document Format
Description:
Full-text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
RP-Department of Chemistry