Browsing Journals: Department of Physical Sciences by Author "Thiong’o, Joseph K."
Now showing items 1-6 of 6
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Cementing material from rice husk-broken bricks-spent bleaching earth-dried calcium carbide residue
Wachira, Jackson M.; Muthakia, Gerald K.; Thiong’o, Joseph K. (2012)A cementious material, coded CSBR (Carbide residue Spent bleaching earth Broken bricks and Rice husks), was made from dried calcium carbide residue (DCCR) and an incinerated mix of rice husks (RH), broken bricks (BB) and ... -
Effect of Bacillus cohnii on Some Physicomechanical and Microstructural Properties of Ordinary Portland Cement
Ngari, Reginah Wangui; Thiong’o, Joseph K.; Wachira, Jackson M. (Hindawi, 2020-09)Cement-made materials face durability and sustainability challenges. (is is majorly caused by the presence of cracks. Cracking affects the mechanical strength of cement-based materials. Microbiologically induced calcite ... -
Influence of Starkeya novella on Mechanical and Microstructural Properties of Cement Mortars
Munyao, Onesmus Mulwa; Thiong’o, Joseph K.; Wachira, Jackson M.; Mutitu, Daniel Karanja; Mwirichia, Romano K. (Hindawi, 2020-04)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 ... -
Physicochemical Performance of Portland-Rice Husk Ash-Calcined Clay-Dried Acetylene Lime Sludge Cement in Sulphate and Chloride Media
Wachira, Jackson M.; Thiong’o, Joseph K.; Marangu, Joseph M.; Murithi, Leonard G (Hindawi, 2019-03)This paper reports leach and/or intake of SO42−, Cl−, Ca2+, Na+, and K+ from and/or into cement mortar cubes made from a novel cementious material in naturally encountered environmental simulated media. The paper also ... -
A Review on Pyroprocessing Techniques for Selected Wastes Used for Blended Cement Production Applications
Nalobile, Protus; Wachira, Jackson M.; Thiong’o, Joseph K.; Marangu, Joseph M. (Hindawi, 2020-08)Pyroprocessing is an important stage in cement manufacturing. In this process, materials are subjected to high temperatures so as to cause a chemical or physical change. Its control improves efficiency in energy utilization ... -
Thermal Resistivity of Chemically Activated Calcined Clays-Based Cements
Mwiti, Marangu J.; Thiong’o, Joseph K. (Springer, 2017-10)The study investigated the effects of selected potential chemical activators on thermal resistivity of calcined clay based cement mortars. 0.5 M Na2SO4 and 0.5 M NaOH were used as activator solutions. The chemical ...