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Research projects on the subject Chemistry and mineralogy


Current

Performance of ternary cements with Portland cement clinker, granulated blast furnace slag and calcined clay as the main constituents

The aim of the research project is the detailed investigation of the performance, durability and hydration behaviour of ternary cements with blastfurnace slag and calcined clay as main constituents (KSQ cements).

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Current

Effects of pre-hydration on the performance of cements and the influence of different clinker properties

The research project has two objectives. The first is to investigate whether certain chemical / mineralogical properties can make clinker more robust against pre-hydration effects. Secondly, it will be investigated which measures can be taken to counteract possible negative effects, in particular by adjusting the sulphate carrier composition.

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Completed

Cement chemical optimisation of cements containing fly ash

Various cement-chemical optimisation possibilities for cements containing fly ash with different types of hard coal fly ash were intensively investigated. Furthermore, the effects of different clinkers and sulphate carriers as well as mineral additives on hydration and strength development were determined.

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Completed

Concept for retrospective determination of the concrete composition, the grading curve as well as further properties of aggregates or the cements in hardened concrete

The aim of the project was to address open questions of the finished project IGF 17829 N and to develop a method for determining the grading curve of aggregates in hardened concrete.

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Completed

Influence of the reduction of melting point and viscosity of the clinker melt by ashes of alternative fuels on sintering reactions and coating formation

A database was compiled which cement manufacturers can use to influence and further optimise the formation of the melt phase by selecting suitable alternative fuels and their proportion.

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Completed

Prevention of a deleterious ASR with Portland-fly ash cement – mechanisms in concrete

The research activities continued the project “Low alkali cements with fly ash” (IGF 17249N) with two main targets. Firstly the effects of different characteristics of cements with fly ash on the release of aluminium into the pore solution were investigated. Secondly it was looked into how much each of the examined mechanisms (reduction of the alkali ion concentration, reduction of portlandite availability, release of aluminium into the pore solution, change of the cement stone microstructure) contributes to the prevention of a deleterious ASR.

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Completed

Investigations on the suitability of dolomitic carbonate rocks as cement main constituent

The aim of the research project was to investigate the suitability or usefulness of dolomitic carbonate rocks as a main cement constituent and to define requirements for dolomitic carbonate rocks as required for the production of high-performance dolomitic cements and concretes of high durability.

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Completed

High-performance clinker for blastfurnace cements

Aim of the project was to improve the early strength performance of blastfurnace cements by a systematic adjustment of the clinker phase composition and/or addition of mineralisers in the clinker production process.

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