Durable concrete by using aluminum containing supplementary cementing materials with special consideration of interactions between additive and aggregate

本项目的目的是研究含铝辅助胶凝材料（SCM）与水泥石基质之间的相互作用，特别是作为一种新的想法与混凝土中的骨料颗粒抑制ASR。在碱性溶液中使用不同的聚集体进行溶解实验，内部有和没有SCM。通过比较在反应产物中基于其原始组成形成纯硅酸盐、铝硅酸盐和铝酸盐结构的添加剂，应根据SCM的铝含量确定ASR抑制效果的机理。同时，还应研究如何使合适的添加剂的活性和用量分别适应骨料的碱敏性。为了能够讨论混凝土中的复杂过程，有必要首先在单独的系统中观察SCM与水泥石基质和骨料的反应。从而期望得到更详细的反应机理。之后，应将其转移到混凝土上，并与混凝土一起使用，以得出关于骨料反应性的辅助胶结材料的种类和数量的基本原则。

The aim of this project is to study interactions between aluminum containing supplementary cementing materials (SCM) with the cement stone matrix, but especially as a new idea with the aggregate grains in concrete to inhibit an ASR. Dissolution experiments using different aggregates in alkaline solutions with and without SCM inside should be done. By the comparison of additives which form, based on their original composition, pure silicate, alumino silicate and aluminate structures in reaction products the mechanisms of the ASR inhibiting effect should be determined in dependence on the aluminum content of the SCM. At the same time it should be examined how can be carried out an adaption of the reactivity and amount of the suitable additive to the alkali sensitivity of the aggregate respectively. To be able to discuss the complicated processes in the concrete, it is necessary to observe the reactions of the SCM`s with the cement stone matrix and the aggregate first in separate systems. Thereby we expect results to the reaction mechanisms in more details. They should be transferred afterwards on the concrete and serve with it to derive basic principles for the kind and amount of a supplementary cementing material on the reactivity of an aggregate.