Compute for the Initial setting time of the cement given the following result: TIME (minutes) PENETRATION 15 46 30 41 45 35 60 32 75 28 90 23 o 83 mins o 85 mins o 87 mins o 84 mins

Q: Figure 15.51

A: Solution

Q: For determination of initial setting time use the following data: Time Penetration 30 min 40 mm 40…

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Q: compressive load P as shown in Table 1 below. Table 1. Experimental results Length b (cm)…

A:

Q: The pycnometer method has been adopted to measure the specific gravity of cement. The following…

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Types of Cement

Cement is a fine mixture of limestone, chalk, or marl and clay which when mixed with water, becomes compacted due to the formation of strong molecular bonds. Due to hydration, cement turns into a hard mass when left for a sufficient amount of time upon mixing with water. The water turns the cement compounds into gel-like submicroscopic particles having higher surface areas. It is due to the hydration properties of cement, they are often known as hydraulic cement. For instance, Portland cement is a popular example in this category.