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Now showing items 11-20 of 23
Review of Carbonation Resistance in Hydrated Cement Based Materials
(Hindawi, 2019-01)
Blended cements are preferred to Ordinary Portland Cement (OPC) in construction industry due to costs and technological and
environmental benefits associated with them. Prevalence of significant quantities of carbon dioxide ...
Influence of Lysinibacillus sphaericus on compressive strength and water sorptivity in microbial cement mortar
(Elsevier, 2019-11)
Cement structures are subject to degradation either by aggressive media or development of micro/macro cracks
which create external substance ingress pathways. Microbiocementation can be employed as a self-intelligent
solution ...
Effects of biocementation on some properties of cement-based materials incorporating Bacillus Species bacteria – a review
(Taylor and Francis, 2019-11)
There is a growing need in the construction industry to improve transfer and
durability aspects of Portland pozzolana cement. Ureolytic bacteria have recently
emerged as potential micro-organisms well known for precipitation ...
Diffusivity of Sulphate Ion in Selected Ordinary Portland and Portland Pozzolana Cements Mortar
(Kenya Chemical Society, 2014)
Cement is subject to degradation by aggressive media. This study investigated sulphate
diffusivity in mortar made from selected Kenyan cements which included three brands of
Ordinary Portland Cements (OPC) and three ...
Determination of Potassium Levels in Intensive Subsistence Agricultural Soils in Nyamira County, Kenya
(2013)
Assessment of potassium levels in agricultural soils of Nyamira County, Kenya was necessitated by the observed progressive drops in maize acreage yields over the years despite use of phosphorus and nitrogenous fertilizers. ...
Beneficiation of Iron in Thermal-Reduced Ilmenite by Magnetic Separation
(2013)
ncreasing demands for Iron in countries development, and lack of conventional reducing agents has resulted into sourcing
of alternative ways of beneficiating the iron ore. This paper reports on the study that was done ...
Cementing material from rice husk-broken bricks-spent bleaching earth-dried calcium carbide residue
(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 ...
Concentration of Laterites Using Biomass
(Kenya Industrial Property Institute, 2015-06-11)
A method of concentrating iron in laterites to make the iron extraction process economical
is disclosed. Concentration using biomass yields higher levels of iron by using appropriate
ratio of biomass: laterites. The ...
Properties of activated blended cement containing high content of calcined clay
(Elsevier, 2018-08)
This paper presents findings of an experimental investigation on sodium sulphate
(Na2SO4) activated calcined clay e Portland cement blends in sulphuric acid media.
Calcined clays were blended with Ordinary Portland Cement ...
Influence of Lysinibacillus sphaericus on compressive strength and water sorptivity in microbial cement mortar
(Elsevier, 2019-11)
Cement structures are subject to degradation either by aggressive media or development of micro/macro cracks
which create external substance ingress pathways. Microbiocementation can be employed as a self-intelligent
solution ...