How does cement harden? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12 Students CBSE Exams.
How does cement harden?
When cement is mixed with water it hardens. This is probably due to a complicated chemical reaction between the compounds in the cement and water. There are four main compounds in cement. These are believed to become crystals with the addition of water. When the crystals interlock, cement hardens.
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