开发出了一种石灰石复合激发剂,应用该种激发剂可以用抗压强度52.5 MPa的熟料稳定生产出石灰石混合材掺量为30%的42.5 MPa水泥。同时该种复合激发剂对于大掺量石灰石粉的混凝土也具有良好的增强作用,并且石灰石矿粉可以有效改善混凝土的收缩性能。因此认为,石灰石作为一种新型改性材料在水泥混凝土中具有良好的应用前景。

Utilization of Limestone as Mineral Admixture in Cement and ConcreteLI Yue1,DING Qing-jun2,HU Shu-guang2 (1.School of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100022,China;2.School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China)In this paper,a kind of limestone compound active agent(LCAA),which can greatly increase the strength of blended limestone cement was introduced.For example,52.5 MPa clinker can generate 42.5 MPa cement containing 30% limestones by mass when LCAA was used in the cement.Simultaneously,LCAA also had good effects on the strength increment of limestone mineral admixture concrete.Moreover,the shrinkage property of concrete was obviously decreased by adding lime stone admixture.Therefore,limestone had good future as mineral admixture in cement and concrete.limestone powder;limestone active agent;cement and concrete;shrinkage