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Nkalagu is a town in Ishielu Local Government Area of Ebonyi State, Nigeria. It is notable for having a large deposit of limestone which provided the raw material for the large cement plant of the Nigerian Cement Company (Nigercem). [1] Nkalagu is the first town you will enter, when you are going into Ebonyi State through Enugu-Abakaliki ...
The company was founded [8] by the Northern Nigeria Development Company and sourced its limestone from the Kalambaina formation nearby. BUA Group acquired controlling interest in CCNN in 2009 and in 2018, it facilitated the merger of its solely owned Kalambaina Cement with the publicly listed CCNN. [ 9 ]
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In the lime industry, limestone is a general term for rocks that contain 80% or more of calcium or magnesium carbonate, including marble, chalk, oolite, and marl.Further classification is done by composition as high calcium, argillaceous (clayey), silicious, conglomerate, magnesian, dolomite, and other limestones. [5]
Limestone (calcium carbonate CaCO 3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO 3. Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place ...
Clay blocks (sometimes called clay block brick) being laid with an adhesive rather than mortar. Bricks are made in a similar way to mud-bricks except without the fibrous binder such as straw and are fired ("burned" in a brick clamp or kiln) after they have air-dried to permanently harden them. Kiln fired clay bricks are a ceramic material ...
This reduces the compressive strength of the mortar but allows the wall system to function better. The lime mortar acts as a wick that helps to pull water from the brick. This can help to prevent the older brick from spalling. Even when the brick is a modern, harder element, repointing with a higher ratio lime mortar may help to reduce rising damp.
A limestone pavement is a natural karst landform consisting of a flat, incised surface of exposed limestone that resembles an artificial pavement. [1] The term is mainly used in the UK and Ireland, where many of these landforms have developed distinctive surface patterning resembling paving blocks. [ 2 ]