Early-strength low-heat cement for railway engineering and preparation method thereof

The invention relates to early-strength low-heat cement for railway engineering. The early-strength low-heat cement comprises the following components in parts by mass: 90-95 parts of cement clinker and 5-10 parts of gypsum, wherein the litre weight of the cement clinker is greater than 1350 g/l. According to the early strength type low-heat cement, hydration heat is low, strength is high, the 3-day strength is greater than or equal to 16.0 MPa; the 28d strength is greater than or equal to 45.0 MPa, the 56d strength is greater than or equal to 55.0 MPa, the 3-day hydration heat is less than orequal to 220 kj/kg, the 7-day hydration heat is less than or equal to 250 kj/kg, and the 28-day hydration heat is less than or equal to 300 kj/kg, and the crack resistance requirement of the railwayengineering mass concrete can be met. 本发明涉及一种铁道工程用早强型低热水泥，按质量份计的组成为：水泥熟料90-95份；石膏5-10份；所述的水泥熟料的立升重大于1350g/l。本发明所提供的铁道工程用早强型低热水泥，其水化热低，强度高，3天强度≥16.0MPa，28d强度≥45.0MPa，56d强度≥55.0Mpa，3天水化热≤220kj/kg，7天水化热≤250kj/kg，28天水化热≤300kj/kg，可