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Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars
Joint Authors
Wachira, Jackson Muthengia
Mutitu, Daniel Karanja
Mwirichia, Romano
Thiong’o, Joseph Karanja
Munyao, Onesmus Mulwa
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-05-18
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Cement-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.
This 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.
This was denoted by massive formation of ettringite and gypsum which are injurious to mortar/concrete.
American Psychological Association (APA)
Munyao, Onesmus Mulwa& Thiong’o, Joseph Karanja& Wachira, Jackson Muthengia& Mutitu, Daniel Karanja& Mwirichia, Romano. 2020. Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars. Journal of Chemistry،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1182286
Modern Language Association (MLA)
Munyao, Onesmus Mulwa…[et al.]. Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars. Journal of Chemistry No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1182286
American Medical Association (AMA)
Munyao, Onesmus Mulwa& Thiong’o, Joseph Karanja& Wachira, Jackson Muthengia& Mutitu, Daniel Karanja& Mwirichia, Romano. Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars. Journal of Chemistry. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1182286
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1182286