我国对混合材的研发工作需要全盘部署和推进

Necessity of overall arrangement and development for the research of mineral admixture in China

上世纪五、六十年代,国内外水泥界都认为水泥混合材是一种中性填充料。对各种混合材进行深加工,激发其潜在水化活性和胶凝性,可在不影响水泥基本性能和强度的前提下少用熟料。国际最新研究成果:深加工矿渣对熟料的替代功能已提高到50%～60%,粉煤灰的可达15%～20%,石灰石的可达5%～10%;LC水泥熟料系数可降到0.50,碳足迹比传统水泥减少200～250 kg CO_2/t,降排近40%。建议我国紧跟国际发展趋势,把混合材看作为水泥组成中一种材料,加紧部署、推进和研发其潜在胶凝性能,部分替代熟料,为水泥工业的低碳转型作出应有的贡献。

In the 1950’s and 1960’s, the mineral admixture used in cement was regarded as a kind of inactive filler in both domestic and foreign cement industries. The potential hydration activity and cementitious property of the mineral admixtures stimulated by deep processing of various mixtures can reduce the clinker content without affecting the performances and strength of cement. According to the latest researches, the replacement ratio of blast furnace slag, fly ash and limestone powder with deep processing could reach 50%~60%, 15%~ 20% and 5%~ 10%, respectively. The LC cement only have a clinker coefficient of 0.50, and its carbon footprint decreases by 200-250kg CO/t in comparison with the traditional cement, which accounted for nearly 40% of the carbon emission of the traditional cement. Following the international development trend, the use of the mineral admixture as a essential material in the cement should be arranged and developed in China, and the potential cementitious property should be further studied, then the partial replacement of the clinker make worthy contributions to the low-carbon transformation of the cement industry.