Loss of water: Cement is a mixture of various compounds, including calcium silicates and calcium aluminates. When water is added to cement, these compounds react with water to form a paste. This paste is then used to bind together construction materials, such as sand and gravel. As the cement paste cures, it loses water and hardens. This process is called hydration.
Chemical reactions: The chemical reactions that take place during the hydration of cement also contribute to its thickening. These reactions produce a number of different compounds, including calcium hydroxide and calcium silicate hydrate. These compounds are responsible for the strength and durability of cement. However, they can also make the cement paste more viscous, which can lead to thickening.
Temperature: The temperature of the water used to mix cement can also affect its thickness. Warm water causes the cement to hydrate more quickly, which can lead to thickening. Cold water slows down the hydration process, which can help to prevent thickening.
Additives: Some cement manufacturers add additives to their products to improve their performance. These additives can include plasticizers, which help to reduce the viscosity of the cement paste, and air-entraining agents, which help to introduce air bubbles into the paste. These additives can help to prevent the cement from thickening.
