Understanding the mechanism controlling the sulfate requirement of blended cements is crucial for a successful deployment of these technologies towards a more sustainable industry. Particularly, clarification regarding the role of alumina content on the sulfate requirement is essential to establish suitable procedures to achieve proper sulfation in practice. In this study, the role of alumina content on the sulfate requirement of cementitious systems is investigated in PC, blends of PC and slag and LC³-type systems. It is observed that adsorption of sulfate on surfaces, mainly C-(A)-S-H, is the overwhelming factor controlling the sulfate demand of these systems. Dissolution of alumina from slag and metakaolin and adsorption of sulfate in other surfaces seem to have only a minor effect on the overall sulfate requirement. Furthermore, these effects are not correlated with the total amount of alumina present in the SCM used.

了解控制混合水泥硫酸盐需求的机制对于将这些技术成功部署到更可持续的行业至关重要。特别是，澄清氧化铝含量对硫酸盐要求的作用对于建立合适的程序以在实践中实现适当的硫酸盐化至关重要。^{在本研究中，在 PC、PC 和矿渣的混合物以及 LC 3}中研究了氧化铝含量对水泥体系硫酸盐需求量的影响。型系统。据观察，硫酸盐在表面上的吸附，主要是 C-(A)-SH，是控制这些系统对硫酸盐需求的压倒性因素。氧化铝从炉渣和偏高岭土中的溶解以及硫酸盐在其他表面的吸附似乎对硫酸盐的总需求量只有很小的影响。此外，这些影响与使用的 SCM 中存在的氧化铝总量无关。