Using the mechanically activated fraction smaller 2 mm of crushed concrete as an altenative composite material in cement

由于资源稀缺和对废料回收的需求，混凝土废料的回收，尤其是由于大的质量流量，是一个重要的领域， 为实现必要的气候目标而进行的研究。在项目的第一部分中，明确表明使用高能米尔斯，特别是搅拌球磨机，在处理旧混凝土碎砂方面具有显着的优势。除了成核效应之外，还可以检测到独立于粒度组分的活化。此外，它已被证明，骨料和水泥石的分离起着至关重要的作用，再生材料的活性。因此，新项目应处理以下问题：-粗骨料和细骨料以及水泥石的最有效分离存在哪些可能性？是否可以将分离、研磨和研磨联合收割机结合起来？再生骨料有哪些特性？经过加工的水泥石在复合水泥中的作用是什么？水泥能达到什么性能？“再生水泥”在混凝土中的作用是什么？作为拟议项目期间的一个关键要素，水泥水化产物的机械影响和结构变化以及生态效益之间的基本关系将通过在混凝土中的实际应用进行研究。

Because of scarce resources and the demand for recycling of waste materials, the recycling of concrete waste, not least due to the large mass flow, is an important area of ​​research to achieve necessary climate goals. In the first part of the project, it was explicitly shown that the usage of high-energy mills, in particular that of the agitator ball mill, has significant advantages in the treatment of old concrete crushed sand. In addition to the nucleating effect, an activation independent of the granulometric component could be detected. In addition, it has been shown that the separation of aggregate and cement stone plays a crucial role in the activability of recycled material. Accordingly, the new project should deal with the following questions:- What possibilities exist for the most effective separation of coarse and fine aggregate and cement stone?- Is it possible to combine separation, attrition and grinding?- Which properties does the recycled aggregate have?- What is the effect of the processed cement stone in the composite cement?- What cement performance can be achieved?- How does a "recycling cement" behave in concrete?As a key element of the proposed project period, the fundamental relationships between the mechanical impact and structural changes of the cement hydration products as well as the ecological benefits will be examined by means of practical applications in concretes.