This cement falls into the third category of Type I cements and is characterized by high fineness (Blaine value), a near-zero residue on a 90-micron sieve, and very high compressive strength. Mortar and concrete made with this cement exhibit moderate resistance in sulfate-rich environments. The increased specific surface area (Blaine) significantly enhances many of the cement's physical properties, particularly the compressive and flexural strengths of the resulting mortar and concrete. The minimum compressive strength of this cement at 2 and 28 days is 20.0 MPa and 52.5 MPa, respectively.
This cement falls into an intermediate category among Type I cements; while retaining the chemical characteristics of Type II cement, it offers higher strength than both Type II and Type I (class 32.5) cements. Furthermore, mortar or concrete produced with this cement exhibits moderate resistance in sulfate-rich environments. Other notable features include a reduction in the amount of cement required to achieve a specific concrete strength, enhanced durability of the resulting concrete compared to Type I (class 32.5) cement, and the ability to remove formwork earlier than is possible with Type I (class 32.5) cement. The minimum compressive strength of this cement at 2 and 28 days is 10.0 MPa and 42.5 MPa, respectively.