Cementitious / Images
1Cement Hydration
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149
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149
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The sequence of micrographs of Portland cement was taken at 15 minutes, 4 hours and 20 hours after mixture preparation. The prepared mixture was inserted into a QX-202C capsule and imaged using a high vacuum SEM.

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2Gypsum Hydration
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150
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150
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Early stages of gypsum hydration are imaged with a conventional SEM using a QX-202C capsule. The growth of needle like crystals can be followed in the sequence of micrographs. Images were taken at 8, 24, and 60 minutes. The formation of a network of gypsum crystals is evident within the first hour of observation as seen in the image on the right.

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3Mortar Hydration
151
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151
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151
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The sequence of micrographs of commercial mortar was taken at 5 minutes, 30 minutes and 60 minutes after mixture preparation. The prepared mixture was inserted into a QX-202C capsule and imaged using a high vacuum SEM.

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