— The effect of adding gypsum to clinker measured by performing a mortar compressive strength test and the binding time at the ages of 1, 3, 7, and 28 days.

Gypsum plays a very important role in controlling the rate of hardening of the cement. During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process. Gypsum is added to control the "setting of cement".

Cooling and addition of gypsum. Milling of gypsum and clinker that will together make the cement. The block diagram of the production process of cement is given below : Figure 1 : Cement production process block diagram. 2. Cement production step by step. 2.1 Limestone rock crushing.

 — Explore the significance of clinker grinding in cement manufacturing, from particle size reduction to improved reactivity and quality control. Learn how this integral process transforms clinker into the final cement product.

Gypsum is one of the additive raw materials added to the clinker grinding process that regulate the binding time of cement or commonly known as a retarder.

Alkanolamines are commonly used complexing agents in the cement industry. Due to its surface activation effect on cement clinker particles, it is commonly used as cement grinding aids [44], [45].When used as chemical admixtures, it can accelerate the early hydration process of cement by complexing with metal ions [46], [47].Among them, …

 — Finish grinding of clinker and other cement ingredients reduces 25 mm clinker balls to particle sizes optimally ranging from 3 to 30 microns. The European Cement Research Academy (ECRA) estimates that up to 70% of the power consumed in cement production is for material size reduction.

Therefore, understanding the relationship of the resistance to grinding of the cement components to the overall resistance when intergrinding is essential to optimize and reduce the energy consumption of these processes.

 — It has been recognized that gypsum and calcium sulfates in general play an important role in the manufacture of clinker-mineralizer or modifier in the recycling of alkalis—both as binding components-expansive cements—and as regulators of the rheology and of the hydration rate of Portland cement.

The main purpose of adding gypsum in the cement is to slow down the hydration process of cement once it is mixed with water. The process involved in hydration of cement is that, when the water is added into cement, it starts reacting with the C3A and hardens.