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The aim of the research project was to find out why some CEM I-SR and CEM III/B-SR cements do not meet the criteria for high sulfate resistance (SR) under all conditions of the SVA test method, the common accelerated test method in Germany; although these cements show high sulfate resistance in practice.
The new research project focussed on the optimisation of pozzolanic cements concerning the processing and composition of their constituents as well as the durability of concretes made of these cements.
The main scope of this research project was to supply evidence that selected inorganic substances are suitable for the use as minor constituents.
As part of the project, methods should be developed that allow the cement content, cement type and additive content in hardened concrete to be reliably determined.
The research project initially involved a sequence of steps to formulate robust, automated preparation methods and evaluation files and determine their reproducibility.
It was determined how the rheological properties and the consistency of fresh concrete can be improved by the adjustment of the type and proportion of fly ash or calcined clay in the cement to the clinker as well as the type and dosage of the superplasticizer.
The aim of the AiF research project was to identify the causes of the sometimes greater scatter rates in the analysis results in the case of comparison trials for the long-term tank test.
This publication is just available in German.
