本发明属于水泥领域，特别涉及一种大掺量低品位石灰石的32.5低碱砌筑水泥及其制备方法。本发明所述低碱水泥以质量分数计包括以下组分：低碱熟料51.0‑61.0％，低品位石灰石35.0‑40.0％，粉煤灰1.0‑5.0％，二水石膏3.0‑4.0％。本发明采用低碱熟料与大掺量低品位石灰石两种配合的方法，得到的水泥与常规水泥相比，其碱含量低，具有较好的后期强度，优化混凝土使用性能，满足客户需求，质量更为优异。同时结合本地资源现状，使用的大掺量低品位石灰石是价格最低的一种，具有明显的成本优势，有效降低水泥成本，既解决了环境保护问题，又有效的利用了当地的资源，具有明显的社会效益和可观的经济效益；同时其制备方法与原料符合绿色环保的需求。

The invention belongs to the field of cement, and particularly relates to 32.5 low-alkali masonry cement of large-dosage low-grade limestone and a preparation method of the 32.5 low-alkali masonry cement. The low-alkali cement disclosed by the invention is prepared from the following components in percentage by mass: 51.0 to 61.0 percent of low-alkali clinker, 35.0 to 40.0 percent of low-grade limestone, 1.0 to 5.0 percent of fly ash and 3.0 to 4.0 percent of dihydrate gypsum. Compared with conventional cement, the cement prepared by adopting a method of matching the low-alkali clinker and the large-dosage low-grade limestone has the advantages of low alkali content, better later strength, optimized concrete use performance, capability of meeting customer requirements and more excellent quality. Meanwhile, in combination with the current situation of local resources, the used large-mixing-amount low-grade limestone is one kind with the lowest price and has the obvious cost advantage, the cement cost is effectively reduced, the environmental protection problem is solved, the local resources are effectively utilized, and obvious social benefits and considerable economic benefits are achieved; meanwhile, the preparation method and the raw materials meet the green and environment-friendly requirements.