Browsing by Author "Wachira, Jackson Muthengia"
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Chloride Diffusivity in Blended Cement Made from Selected Industrial and Agrowastes
Wachira, Jackson Muthengia; Marangu, Joseph Mwiti (Hindawi, 2020)This paper reports study findings on the diffusivity of chloride ions in potential blended cement. The cement, abbreviated as PCDC, was made from blending ordinary Portland cement (OPC) with dried calcium carbide residue ... -
Chloride Ingress in Chemically Activated Calcined Clay-Based Cement
Marangu, Joseph Mwiti; Thiong’o, Joseph Karanja; Wachira, Jackson Muthengia (Elsevier, 2018)Chloride-laden environments pose serious durability concerns in cement based materials. This paper presents the findings of chloride ingress in chemically activated calcined Clay-Ordinary Portland Cement blended mortars. ... -
Effect of Sulphate and Chloride Ingress on Selected Cements Mortar Prisms Immersed in Seawater and Leather Industry Effluent
Wachira, Jackson Muthengia; Ngari, Reginah Wangui; Thiong’o, Joseph Karanja; Marangu, Joseph Mwiti (Hindawi, 2019)Cement structures are major capital investments globally. However, exposure of cement-based materials to aggressive media such as chloride- and sulphate-laden environments such as coastal areas affects their performance. ... -
Performance of Ground Clay Brick Mortars in Simulated Chloride and Sulphate Media
Musyimi, Festus Ngui; Wachira, Jackson Muthengia; Thiong’o, Joseph Karanja; Marangu, Joseph Mwiti (Hindawi, 2019)The durability of cement-based structures majorly depends on their resistivity to the aggressive media in the construction environment. The most aggressive ions commonly encountered in construction environment are chloride ... -
Physicochemical Performance of Portland-Rice Husk Ash-Calcined Clay-Dried Acetylene Lime Sludge Cement in Sulphate and Chloride Media
Wachira, Jackson Muthengia; Thiong’o, Joseph Karanja; Marangu, Joseph Mwiti; Murithi, Leonard Genson (ResearchGate GmbH, 2019)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 ... -
Potential for Selected Kenyan Clay in Production of Limestone Calcined Clay Cement
Marangu, Joseph Mwiti; Riding, Kyle; Alaibani, Anfal; Zayed, Abla; Thiong’o, Joseph Karanja; Wachira, Jackson Muthengia (Springer, 2020)The potential for calcined clay, and in particular Limestone Calcined Clay Cement (LC3), to be used in concrete in Kenya was examined in this study. Locations of clay sources and existing mining infrastructure were examined ... -
Pyroprocessing and the Optimum Mix Ratio of Rice Husks, Broken Bricks and Spent Bleaching Earth to Make Pozzolanic Cement
Nalobile, Protus; Wachira, Jackson Muthengia; Thiong'o, Joseph Karanja; Marangu, Joseph Mwiti (Elsevier, 2019)This paper presents the findings of an experimental investigation on optimizing pozzolanic activity of a blend of Rice Husks (RH), Spent Bleaching Earth (SBE) and Broken Bricks (BB) to form pozzolana that would have ...