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Corrosion of reinforcing steel bars in concrete

Before being placed in a formwork, steel reinforcement may become rusted, because it was initially exposed to the atmosphere. When freshly-mixed concrete is placed around this steel, the mixing water penetrates through the rust pores, where it gradually forms hydrated calcium ferrite (4.CaO. Fe2 O3 13H2 O). Moreover, this water reacts with steel and forms…

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Why Is Calibration So Important ?

Calibration quantifies the risk associated with a measurement. It provides a user with an unbroken chain between the instrument in use, and its corresponding SI unit. Calibration also evaluates how an instrument drifts from the true value with time; thereby providing a means of determining if a device is stable or approaching the end of…

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Calibration – What is it? Who needs it?

You have just bought a new thermometer to measure the temperature of a solution you prepare for clients. The solution needs to be a specific temperature and you assume that the new thermometer you bought gives an accurate measurement. However, there is a possibility that this thermometer gives an incorrect measurement, or is “off” by one…

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