{"id":7902,"date":"2019-06-18T12:06:47","date_gmt":"2019-06-18T12:06:47","guid":{"rendered":"https:\/\/nbrri.gov.ng\/new\/?page_id=7902"},"modified":"2019-06-20T09:12:22","modified_gmt":"2019-06-20T09:12:22","slug":"cement-testing","status":"publish","type":"page","link":"https:\/\/nbrri.gov.ng\/new\/cement-testing\/","title":{"rendered":"Cement Testing"},"content":{"rendered":"

Cement, a fine-grained binder which when mixed with fine aggregate, sand and water transforms into a paste that binds and hardens when submerged in water.
\nHigh quality cement is necessary for the production of mortar and concrete to satisfy relevant construction industry specifications.<\/p>\n

\u2022 Consistency, initial and final setting time (Vicat method)<\/strong><\/em>
\n\u2022 Soundness of cement (le-Chatelier method)<\/strong><\/em>
\n\u2022 Fineness<\/strong><\/em>
\n\u2022 Specific gravity<\/strong><\/em>
\n\u2022 Chemical analysis of cement<\/strong><\/em>
\n\u2022 Flame photometry<\/strong><\/em>
\n\u2022 Loss on Ignition<\/strong><\/em><\/p>\n

 <\/p>\n

CONSISTENCY, INITIAL AND FINAL SETTING TIME (VICAT METHOD)<\/strong>
\nThe vicat test set determines the quantity of water required to produce a cement paste of standard consistency and setting time of cements.<\/p>\n

\"\"Figure 18:<\/em><\/strong> Vicat apparatus<\/p>\n

 <\/p>\n

SOUNDNESS OF CEMENT (LE-CHATELIER METHOD)<\/strong><\/em>
\nThe le chatelier method is used to determine the expansion of cement<\/p>\n

\"\"<\/p>\n

Figure 19: Le – Chatelier mould<\/strong><\/em><\/p>\n

FINENESS<\/strong>
\nThe Blaine apparatus is used to determine the fineness of cement<\/p>\n

\"\"Figure 20: Blaine air permeability apparatus<\/strong><\/p>\n

 <\/p>\n

SPECIFIC GRAVITY<\/strong>
\nThe Le chatelier flask is used for determining the density of cement<\/p>\n

\"\"Figure 21: Le-Chatelier flask<\/strong><\/p>\n

CHEMICAL ANALYSIS<\/strong>
\nChemical analysis plays an important part in the categorization of cement.<\/p>\n

FLAME PHOTOMETRY<\/strong>
\nThe flame photometer<\/p>\n

is used to determine the constituent parts of cement<\/p>\n

\"\"Figure 22: Flame photometer<\/strong><\/em><\/p>\n

 <\/p>\n

LOSS ON IGNITION<\/strong>
\nThe muffle furnace is used for determining the loss on ignition and insoluble residue of cement<\/p>\n

\"\"Figure 23: Muffle Furnace<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Cement, a fine-grained binder which when mixed with fine aggregate, sand and water transforms into a paste that binds and hardens when submerged in water. 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