Limestone cement, often referred to as Portland-limestone cement (PLC), incorporates a significant amount of ground limestone into the cement mix, replacing a portion of the clinker. Typically, PLC contains between 5% to 35% limestone. This substitution not only reduces the carbon footprint of cement production by lowering the clinker content, which is the primary source of CO 2 emissions but also improves certain properties of the resulting concrete. The fine particles of limestone contribute to the concrete’s workability and density, enhancing its overall performance. PLC is recognized for its sustainability benefits and its potential to improve the durability of concrete structures, particularly in environmentally challenging conditions.